EXHIBIT 10.6

                                                                  EXECUTION COPY

                               SECURITY AGREEMENT
                               ------------------
                       (Savvis Communications Corporation)

         THIS SECURITY AGREEMENT (this "Agreement") dated effective as of March
18, 2002, is by and between SAVVIS COMMUNICATIONS CORPORATION, a Missouri
corporation ("Debtor"), whose address is 12851 Worldgate Drive, Herndon,
Virginia 20170, whose Tax Identification No. is 43-1727675, and whose
organizational identification number is 00418625, and GENERAL ELECTRIC CAPITAL
CORPORATION, as Agent for itself and other Lessors from time to time party to
the Restated Lease Agreement as defined below (in such capacity, together with
its successors and assigns in such capacity, "Secured Party"), whose address is
10 Riverview Drive, Danbury, CT 06810.

                                R E C I T A L S:
                                ----------------

         A. Debtor has entered into that certain Master Lease Agreement dated as
of March 28, 2000 with the Secured Party (the "Master Lease Agreement").

         B. Debtor and Secured Party have amended and restated the Master Lease
Agreement pursuant to that certain Amended and Restated Master Lease Agreement
dated as of March 8, 2002 (as such agreement may be amended, renewed, extended,
restated, replaced, substituted, supplemented or otherwise modified from time to
time, the "Restated Lease Agreement").

         C. In order to induce Secured Party and the Lessors to enter into the
Restated Lease Agreement, Debtor has agreed to enter into this Agreement.

         D. The execution and delivery of this Agreement is required by the
terms of and is a condition to the effectiveness of the Restated Lease
Agreement.

         NOW, THEREFORE, in consideration of the premises and for other good and
valuable consideration, the adequacy, receipt and sufficiency of which are
hereby acknowledged, and in order to induce Secured Party and the Lessors to
continue the extension of credit made under the Restated Lease Agreement and to
enter into the Restated Lease Agreement, the parties hereto hereby agree as
follows:

                                    ARTICLE 1

                                   Definitions
                                   -----------

         Section 1.1 Definitions. As used in this Agreement, the following terms
have the following meanings:


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                  "Account" means any "account", as such term is defined in
         Article or Chapter 9 of the UCC, now owned or hereafter acquired by
         Debtor and, in any event, shall include, without limitation, each of
         the following, whether now owned or hereafter acquired by Debtor: (a)
         all rights of Debtor to payment for goods sold or leased, services
         rendered or the license of Intellectual Property, whether or not earned
         by performance; (b) all accounts receivable of Debtor; (c) all rights
         of Debtor to receive any payment of money or other form of
         consideration, including, without limitation, all Payment Intangibles;
         (d) all security pledged, assigned or granted to or held by Debtor to
         secure any of the foregoing; (e) all guaranties of, or indemnifications
         with respect to, any of the foregoing; (f) all rights of Debtor as an
         unpaid seller of goods or services, including, but not limited to, all
         rights of stoppage in transit, replevin, reclamation and resale; (g)
         all recoveries from third parties arising from the invalidation,
         subordination, or avoidance of Liens on the assets of Debtor or any
         predecessor-in-interest to or of Debtor; (h) all rights in any returned
         or repossessed goods; (i) all rights to brokerage commissions; and (j)
         all other Supporting Obligations, including any applicable Letter of
         Credit Rights.

                  "Amendment" means as such term is defined in Section 4.17(b).

                  "Broker" means any "broker," as such term is defined in
         Article or Chapter 8 of the UCC, and in any event shall include, but
         not be limited to, any Person defined as a broker or dealer under the
         federal securities laws, but without excluding a bank acting in that
         capacity.

                  "Capital Stock" means corporate stock and any and all
         securities, shares, partnership interests (whether general, limited,
         special or other partnership interests), limited liability company
         interests, membership interests, equity interests, participations,
         rights or other equivalents (however designated) of corporate stock or
         any of the foregoing issued by any entity (whether a corporation, a
         partnership, a limited liability company or another entity) and
         includes, without limitation, securities convertible into Capital Stock
         and rights, warrants or options to acquire Capital Stock.

                  "Chattel Paper" means any "chattel paper," as such term is
         defined in Article or Chapter 9 of the UCC, now owned or hereafter
         acquired by Debtor and includes, without limitation, Electronic Chattel
         Paper.

                  "Clearing Corporation" means any "clearing corporation," as
         such term is defined in Article or Chapter 8 of the UCC, and in any
         event shall include, but not be limited to, any (a) Person that is
         registered as a "clearing agency" under the federal securities laws,
         (b) federal reserve bank, or (c) other Person that provides clearance
         or settlement services with respect to Financial Assets that would
         require it to register as a clearing agency under the federal
         securities laws but for an exclusion or exemption from the registration
         requirement, if its activities as a clearing corporation, including,
         without limitation, promulgation of rules, are subject to regulation by
         a Governmental Authority.

                  "Collateral" means as such term is defined in Section 2.1.


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                  "Commercial Tort Claims" means "commercial tort claims", as
         such term is defined in the UCC, now owned or hereafter acquired by
         Debtor, and includes, without limitation, those set forth on Schedule
         2.

                  "Commodity Account" means any "commodity account," as such
         term is defined in Article or Chapter 9 of the UCC, now owned or
         hereafter acquired by Debtor, including, without limitation, all
         accounts maintained by a Commodity Intermediary in which a Commodity
         Contract is carried for Debtor.

                  "Commodity Contract" means any "commodity contract," as such
         term is defined in Article or Chapter 9 of the UCC, and includes,
         without limitation, a commodity futures contract, a commodity option,
         or other contract that, in each case, is (a) traded on or subject to
         the rules of a board of trade that has been designated as a contract
         market for such a contract pursuant to the federal commodities laws, or
         (b) traded on a foreign commodity board of trade, exchange or market,
         and is carried on the books of a Commodity Intermediary for a Commodity
         Customer.

                  "Commodity Customer" means any "commodity customer" as such
         term is defined in Article or Chapter 9 of the UCC, and includes,
         without limitation, any Person for whom a Commodity Intermediary
         carries a Commodity Contract on its books.

                  "Commodity Intermediary" means any "commodity intermediary,"
         as such term is defined in Article or Chapter 9 of the UCC, including,
         without limitation, (a) a Person who is registered as a futures
         commission merchant under the federal commodities laws, or (b) a Person
         who in the ordinary course of its business provides clearance or
         settlement services for a board of trade that has been designated as a
         contract market pursuant to the federal commodities laws.

                  "Copyright License" means any written agreement now or
         hereafter in existence granting to Debtor any right to use any
         Copyright including, without limitation, the agreements identified on
         Schedule 1; provided, however, that there shall be excluded from the
         Collateral any Copyright License to the extent, and only to the extent,
         that such Copyright License contains, as of the date of this Agreement
         a legally enforceable provision under the UCC that would give any other
         party to such agreement or instrument the right to terminate its
         obligations thereunder based on the grant of the security interest
         created herein pursuant to the terms of this Agreement (except that if
         and when any prohibition on the assignment, pledge or grant of Lien on
         such Copyright License is removed or such assignment, pledge or grant
         is consented to, Secured Party will be deemed to have been granted a
         security interest in such Copyright License as of the date hereof or
         other earliest legally valid date, and the Collateral will be deemed to
         include such Copyright License); provided, that in any event the
         foregoing limitation shall not affect, limit, restrict or impair the
         grant by Debtor of a security interest pursuant to this Agreement in
         any accounts receivable or any money or other amounts due or to become
         due under such agreement or instrument.


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                  "Copyright Security Agreement" means a copyright security
         agreement, executed and delivered by Debtor to Secured Party,
         substantially in the form of Exhibit A, as such agreement may be
         amended, supplemented or otherwise modified from time to time.

                  "Copyrights" means all of the following: (a) all copyrights,
         works protectable by copyright, copyright registrations and copyright
         applications of Debtor, including, without limitation, those set forth
         on Schedule 1; (b) all renewals, extensions and modifications thereof;
         (c) all income, royalties, damages, profits and payments relating to or
         payable under any of the foregoing; (d) the right to sue for past,
         present or future infringements of any of the foregoing; (e) all other
         rights and benefits relating to any of the foregoing throughout the
         world; and (f) all goodwill associated with and symbolized by any of
         the foregoing; in each case, whether now owned or hereafter acquired by
         Debtor.

                  "Deposit Accounts" means any "deposit accounts," as such term
         is defined in Article or Chapter 9 of the UCC, now owned or hereafter
         acquired by Debtor, and in any event shall include, without limitation,
         any and all deposit accounts (including cash collateral accounts), bank
         accounts or investment accounts now owned or hereafter acquired or
         opened by Debtor, including, without limitation, those set forth on
         Schedule 2, and any account which is a replacement or substitute for
         any of such accounts, together with all monies, Instruments,
         certificates, checks, drafts, wire transfer receipts and other Property
         deposited therein and all balances therein and all investments made
         with funds deposited therein or otherwise held in connection therewith,
         including, without limitation, indebtedness (howsoever evidenced)
         and/or securities issued or guaranteed by the government of the U.S.,
         certificates of deposit and all contract rights, General Intangibles,
         contracts, Instruments, Investment Property, Security Entitlements,
         Financial Assets, Commodity Contracts and other Documents now or
         hereafter existing with respect thereto, including, but not limited to,
         any and all renewals, extensions, reissuances and replacements and
         substitutions therefor with all earnings, profits or other Proceeds
         therefrom in the form of interest or otherwise, from time to time
         representing, evidencing, deposited into or held in such deposit
         accounts, bank accounts or investment accounts.

                  "Document" means any "document," as such term is defined in
         Article or Chapter 9 of the UCC, now owned or hereafter acquired by
         Debtor, including, without limitation, all documents of title and all
         receipts covering, evidencing or representing goods now owned or
         hereafter acquired by Debtor.

                  "Electronic Chattel Paper" means any "electronic chattel
         paper", as such term is defined in Article or Chapter 9 of the UCC, now
         owned or hereafter acquired by Debtor.

                  "Entitlement Holder" means any "entitlement holder", as such
         term is defined in Article or Chapter 8 of the UCC, and in any event
         shall include, but not be limited to, any Person identified in the
         records of a Securities Intermediary as the Person having a Security


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         Entitlement against the Securities Intermediary, including, without
         limitation, any Person who acquires a security entitlement under
         Article or Chapter 8 of the UCC.

                  "Equipment" means any "equipment," as such term is defined in
         Article or Chapter 9 of the UCC, now owned or hereafter acquired by
         Debtor and, in any event, shall include, without limitation, all
         machinery, equipment, furniture, fixtures, trade fixtures, trailers,
         rolling stock, vessels, aircraft and vehicles now owned or hereafter
         acquired by Debtor and any and all additions, substitutions and
         replacements of any of the foregoing, wherever located, together with
         all attachments, components, parts, equipment and accessories installed
         thereon or affixed thereto.

                  "FCC" means the Federal Communications Commission and any
         successor agency.

                  "Financial Asset" means any "financial asset," as such term is
         defined in Article or Chapter 8 of the UCC, and in any event shall
         include, but not be limited to, any (a) Security, (b) obligation of a
         Person or a share, participation or other interest in a Person or in
         Property or an enterprise of a Person, which is, or is of a type, dealt
         in or traded on financial markets, or which is recognized in any area
         in which it is issued or dealt in as a medium for investment, and (c)
         any Property that is held by a Securities Intermediary for another
         Person in a Securities Account if the Securities Intermediary has
         expressly agreed with the other Person that the Property is to be
         treated as a Financial Asset under Article or Chapter 8 of the UCC.

                  "Financing Statements" means as such term is defined in
         Section 4.4(b).

                  "Fixtures" means any "fixtures", as such term is defined in
         Article or Chapter 9 of the UCC, now owned or hereafter acquired by
         Debtor, and in any event shall include, without limitation, all plant
         fixtures, trade fixtures, business fixtures, other fixtures and storage
         facilities, wherever located, and all additions and accessions thereto
         and replacements thereto.

                  "Foreign Subsidiary" means, with respect to any Person, each
         direct or indirect Subsidiary of such Person that is not a U.S.
         Subsidiary.

                  "General Intangibles" means any "general intangibles," as such
         term is defined in Article or Chapter 9 of the UCC, now owned or
         hereafter acquired by Debtor and, in any event, shall include, without
         limitation, each of the following, whether now owned or hereafter
         acquired by Debtor: (a) all of Debtor's service marks, trade names,
         trade secrets, registrations, goodwill, franchises, licenses, permits,
         proprietary information, customer lists, designs and inventions; (b)
         all of Debtor's books and records, including, without limitation, all
         computer runs, invoices, tapes, processing software, processing
         contracts (such as contracts for computer time and services) and any
         computer prepared information, tapes or data of every kind and
         description, whether in the possession of Debtor or in the possession
         of third parties, and all of Debtor's other data, plans, manuals,
         computer software, computer


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         tapes, computer disks, computer programs, source codes, object codes,
         management information systems and all rights of Debtor to retrieve
         data and other information from third parties and other data of every
         kind and description, to the extent that they indicate, summarize or
         evidence, or otherwise relate to, the Accounts or Inventory, whether in
         the possession of Debtor or in the possession of any third party; (c)
         all of Debtor's contract rights, partnership interests, joint venture
         interests, securities, Deposit Accounts, investment accounts and
         certificates of deposit (including, without limitation, all contracts
         relating to the construction or operation of the Network, including
         rights of way, easements, leases and all related contracts); (d) all
         rights of Debtor to payment under letters of credit and similar
         agreements, including, without limitation, all Letter of Credit Rights;
         (e) all tax refunds and tax refund claims of Debtor; (f) all choses in
         action and causes of action of Debtor (whether arising in contract,
         tort or otherwise and whether or not currently in litigation) and all
         judgments in favor of Debtor, including, without limitation, all
         commercial tort claims; (g) all rights and claims of Debtor under
         warranties, indemnities, guaranties or other Supporting Obligations
         with respect to such agreements; (h) all Intellectual Property; (i) all
         rights of Debtor under any insurance, surety or similar contract or
         arrangement, provided, however, that there shall be excluded from the
         Collateral any General Intangible to the extent, and only to the
         extent, that such General Intangible as of the date of this Agreement
         (x) is governed by or contains a legally enforceable provision under
         the UCC that would give any other party to such agreement or instrument
         the right to terminate its obligations thereunder based on the grant of
         the Lien pursuant to the terms of this Agreement or (y) would be
         rendered invalid or unenforceable by the grant of the Lien pursuant to
         the terms of this Agreement (except that if and when any prohibition on
         the assignment, pledge or grant of Lien on such General Intangible is
         removed or such assignment, pledge or grant is consented to, or a Lien
         on such General Intangible may be granted without adversely affecting
         the validity or enforceability of such General Intangible, Secured
         Party will be deemed to have been granted a Lien on such General
         Intangible as of the date hereof or other earliest legally valid date,
         and the Collateral and the General Intangibles will be deemed to
         include such General Intangible); provided, that in any event the
         foregoing limitation shall not affect, limit, restrict or impair the
         grant by Debtor of a security interest pursuant to this Agreement in
         any accounts receivable or any money or other amounts due or to become
         due under such contract, agreement, instrument or indenture; and (j)
         all Payment Intangibles.

                  "Governmental Authority" means any nation or government, any
         state, provincial or political subdivision thereof and any entity
         exercising executive, legislative, judicial, regulatory or
         administrative functions of or pertaining to government.

                  "Guarantee" by any Person means any indebtedness, liability or
         obligation, contingent or otherwise, of such Person directly or
         indirectly guaranteeing any Debt or other obligation of any other
         Person and, without limiting the generality of the foregoing, any
         indebtedness, liability or obligation, direct or indirect, contingent
         or otherwise, of such Person (a) to purchase or pay (or advance or
         supply funds for the purchase or payment of) such Debt or other
         obligation (whether arising by virtue of partnership arrangements, by
         agreement to keep-well, to purchase assets, goods, securities or
         services, to take-or-pay, or to maintain


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         financial statement conditions or otherwise) or (b) entered into for
         the purpose of assuring in any other manner the obligee of such Debt or
         other indebtedness, liability or obligation as to the payment thereof
         or to protect the obligee against loss in respect thereof (in whole or
         in part), provided that the term "Guarantee" shall not include
         endorsements for collection or deposit in the ordinary course of
         business. The term "Guarantee" used as a verb has a corresponding
         meaning. The amount of any Guarantee shall be deemed to be an amount
         equal to the stated or determinable amount of the primary obligation in
         respect of which such Guarantee is made or, if not stated or
         determinable, the maximum anticipated liability in respect thereof
         (assuming such Person is required to perform thereunder).

                  "Holdings" means Savvis Communications Corporation, a Delaware
         corporation.

                  "Instrument" means any "instrument," as such term is defined
         in Article or Chapter 9 of the UCC, now owned or hereafter acquired by
         Debtor, and, in any event, shall include all promissory notes, drafts,
         bills of exchange and trade acceptances of Debtor, whether now owned or
         hereafter acquired.

                  "Intellectual Property" means the Copyrights, Copyright
         Licenses, Patents, Patent Licenses, Trademarks and Trademark Licenses.

                  "Inventory" means any "inventory," as such term is defined in
         Article or Chapter 9 of the UCC, now owned or hereafter acquired by
         Debtor, and, in any event, shall include, without limitation, each of
         the following, whether now owned or hereafter acquired by Debtor: (a)
         all goods and other personal Property of Debtor that are held for sale
         or lease or to be furnished under any contract of service; (b) all raw
         materials, work-in-process, finished goods, inventory, supplies and
         materials of Debtor; (c) all wrapping, packaging, advertising and
         shipping materials of Debtor; (d) all goods that have been returned to,
         repossessed by or stopped in transit by Debtor; and (e) all Documents
         evidencing any of the foregoing.

                  "Investment Property" means any "investment property," as such
         term is defined in Article or Chapter 9 of the UCC, now owned or
         hereafter acquired by Debtor, and, in any event, shall include, without
         limitation, each of the following, whether now owned or hereafter
         acquired by Debtor: (a) the Securities Accounts and other Investment
         Property described on Schedule 2; (b) any Security or Capital Stock,
         whether certificated or uncertificated; (c) any Security Entitlement;
         (d) any Securities Account; (e) any Commodity Contract; and (f) any
         Commodity Account.

                  "Issuer" means any "issuer," as such term is defined in
         Article or Chapter 8 of the UCC, and in any event shall include, but
         not be limited to, any Person that, with respect to an obligation on or
         a defense to a Security, (a) places or authorizes the placing of its
         name on a Security Certificate, other than as authenticating trustee,
         registrar, transfer agent or the like, to evidence a share,
         participation or other interest in its Property or in an enterprise, or
         to evidence its duty to perform an obligation represented by the
         certificate; (b) creates a share, participation or other interest in
         its Property or in an enterprise, or undertakes an obligation,


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         that is an Uncertificated Security; (c) directly or indirectly creates
         a fractional interest in its rights or Property, if the fractional
         interest is represented by a Security Certificate; or (d) becomes
         responsible for, or in the place of, another Issuer.

                  "Letter of Credit Rights" means "letter of credit rights", as
         such term is defined in the UCC, now owned or hereafter owned by Debtor
         including, without limitation, rights to payment or performance under a
         letter of credit, whether or not Debtor has demanded or is entitled to
         demand payment or performance, and includes, without limitation, those
         set forth on Schedule 2.

                  "License" means any consent, permit, franchise, certificate,
         approval, order, license, right-of-way (whether an easement, contract
         or agreement in any form) or other authorization, including, without
         limitation, any FCC license.

                  "Lien" means, with respect to any Property, any mortgage or
         deed of trust, pledge, hypothecation, assignment, deposit arrangement,
         security interest, tax lien, financing statement, pledge, charge,
         hypothecation or other lien, charge, easement (other than any easement
         not materially impairing usefulness), encumbrance, preference, priority
         or other security agreement or preferential arrangement of any kind or
         nature whatsoever on or with respect to such Property (including,
         without limitation, any conditional sale or other title retention
         agreement having substantially the same economic effect as any of the
         foregoing).

                  "Money" means any "money", as such term is defined in Article
         or Chapter 1 of the UCC, now owned or hereafter acquired by Debtor and,
         in any event, shall include, without limitation, cash.

                  "Obligations" means the "Obligations", as such term is defined
         in the Restated Lease Agreement, and the obligations, indebtedness and
         liabilities of Debtor under this Agreement and any other Credit
         Document to which Debtor may be a party.

                  "Patent License" means any written agreement now or hereafter
         in existence granting to Debtor any right to use any invention on which
         a Patent is in existence including, without limitation, the agreements
         described on Schedule 1; provided, however, that there shall be
         excluded from the Collateral any Patent License to the extent, and only
         to the extent, that such Patent License contains, as of the date of
         this Agreement a legally enforceable provision under the UCC that would
         give any other party to such agreement or instrument the right to
         terminate its obligations thereunder based on the grant of the security
         interest created herein pursuant to the terms of this Agreement (except
         that if and when any prohibition on the assignment, pledge or grant of
         Lien on such Patent License is removed or such assignment, pledge or
         grant is consented to, Secured Party will be deemed to have been
         granted a security interest in such Patent License as of the date
         hereof or other earliest legally valid date, and the Collateral will be
         deemed to include such Patent License); provided, that in any event the
         foregoing limitation shall not affect, limit, restrict or impair the
         grant by Debtor of a security


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         interest pursuant to this Agreement in any accounts receivable or any
         money or other amounts due or to become due under such agreement or
         instrument.

                  "Patent Security Agreement" means a patent security agreement
         executed and delivered by Debtor to Secured Party, substantially in the
         form of Exhibit B, as such agreement may be amended, supplemented or
         otherwise modified from time to time.

                  "Patents" means all of the following: (a) all patents, patent
         applications and patentable inventions of Debtor, including, without
         limitation, those set forth on Schedule 1, and all of the inventions
         and improvements described and claimed therein; (b) all continuations,
         re-examinations, divisions, renewals, extensions, modifications,
         substitutions, continuations-in-part or reissues of any of the
         foregoing; (c) all income, royalties, profits, damages, awards and
         payments relating to or payable under any of the foregoing; (d) the
         right to sue for past, present and future infringements of any of the
         foregoing; (e) all other rights and benefits relating to any of the
         foregoing throughout the world; and (f) all goodwill associated with
         any of the foregoing; in each case, whether now owned or hereafter
         acquired by Debtor.

                  "Payment Intangibles" means "payment intangibles" as such term
         is defined in the UCC.

                  "Perfection Certificate" means a perfection certificate in the
         form of Exhibit E.

                  "Person" means any individual, corporation, trust,
         association, company, partnership, joint venture, limited liability
         company, joint stock company, Governmental Authority or other entity.

                  "Pledged Collateral" means as such term is defined in Section
         4.16(b)(i).

                  "Pledged Shares" means 100% of the Capital Stock now owned or
         hereafter acquired by Debtor in any manner of each of the U.S.
         Subsidiaries of Holdings, including, without limitation, the Capital
         Stock identified on Schedule 3 attached hereto, or on Schedule 1 to an
         Amendment.

                  "Proceeds" means any "proceeds," as such term is defined in
         Article or Chapter 9 of the UCC and, in any event, shall include, but
         not be limited to, (a) any and all proceeds of any insurance,
         indemnity, warranty or guaranty payable to Debtor from time to time
         with respect to any of the Collateral, (b) any and all payments (in any
         form whatsoever) made or due and payable to Debtor from time to time in
         connection with any requisition, confiscation, condemnation, seizure or
         forfeiture of all or any part of the Collateral by any Governmental
         Authority (or any Person acting, or purporting to act, for or on behalf
         of any Governmental Authority), and (c) any and all other amounts from
         time to time paid or payable under or in connection with any of the
         Collateral and all other Payment Intangibles relating thereto.


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                  "Property" means property and/or assets of all kinds, whether
         real, personal or mixed, tangible or intangible (including, without
         limitation, all rights relating thereto), whether owned or acquired on
         or after the date hereof.

                  "Revised Article 9" means the Revised Article 9 of the Uniform
         Commercial Code as enacted in the State of New York and/or any other
         jurisdiction.

                  "Securities Account" means any "securities account," as such
         term is defined in Article or Chapter 8 of the UCC, and in any event
         shall include, but not be limited to, any account to which a Financial
         Asset is or may be credited in accordance with an agreement under which
         the Person maintaining the account undertakes to treat the Person for
         whom the account is maintained as entitled to exercise the rights that
         comprise the Financial Asset.

                  "Securities Intermediary" means any "securities intermediary,"
         as such term is defined in Article or Chapter 8 of the UCC, and in any
         event shall include, but not be limited to, any (a) Clearing
         Corporation, or (b) Person, including a bank or Broker, that in the
         ordinary course of its business maintains Securities Accounts for
         others and is acting in that capacity.

                  "Security" means any "security," as such term is defined in
         Article or Chapter 8 of the UCC and, in any event, shall include, but
         not be limited to, any obligation of an Issuer or a share,
         participation or other interest in an Issuer or in Property or an
         enterprise of an Issuer (a) which is represented by a Security
         Certificate in bearer or registered form, or the transfer of which may
         be registered upon books maintained for that purpose by or on behalf of
         the Issuer, (b) which is one of a class or series or by its terms is
         divisible into a class or series of shares, participations, interests
         or obligations, and (c) which (i) is, or is of a type, dealt in or
         traded on securities exchanges or securities markets, or (ii) is a
         medium for investment and by its terms expressly provides that it is a
         security governed by Article or Chapter 8 of the UCC.

                  "Security Certificate" means any "security certificate," as
         such term is defined in Article or Chapter 8 of the UCC, and in any
         event shall include, but not be limited to, any certificate
         representing a Security.

                  "Security Entitlement" means any "security entitlement," as
         such term is defined in Article or Chapter 8 of the UCC, and in any
         event shall include, but not be limited to, any of the rights and
         Property interests of an Entitlement Holder with respect to a Financial
         Asset.

                  "Software" means all software as such term is defined in the
         Code, other than software embedded in any category of goods.

                  "Subsidiary" means, with respect to any Person, any
         corporation or other entity of which at least a majority of the
         outstanding shares of stock or other ownership interests having by the
         terms thereof ordinary voting power to elect a majority of the board of


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<PAGE>


         directors (or Persons performing similar functions) of such corporation
         or entity (irrespective of whether or not at the time, in the case of a
         corporation, stock of any other class or classes of such corporation
         shall have or might have voting power by reason of the happening of any
         contingency) that is at the time directly or indirectly owned or
         controlled by such Person or one or more of its Subsidiaries or by such
         Person and one or more of its Subsidiaries.

                  "Supporting Obligations" means "supporting obligations," as
         such term is defined in the UCC, now owned or hereafter acquired by
         Debtor.

                  "Trademark License" means any written agreement now or
         hereafter in existence granting to Debtor any right to use any
         Trademark, including, without limitation, the agreements identified on
         Schedule 1; provided, however, that there shall be excluded from the
         Collateral any Trademark License to the extent, and only to the extent,
         that such Trademark License contains, as of the date of this Agreement
         a legally enforceable provision under the UCC that would give any other
         party to such agreement or instrument the right to terminate its
         obligations thereunder based on the grant of the security interest
         created herein pursuant to the terms of this Agreement (except that if
         and when any prohibition on the assignment, pledge or grant of Lien on
         such Trademark License is removed or such assignment, pledge or grant
         is consented to, Secured Party will be deemed to have been granted a
         security interest in such Trademark License as of the date hereof or
         other earliest legally valid date, and the Collateral will be deemed to
         include such Trademark License); provided, that in any event the
         foregoing limitation shall not affect, limit, restrict or impair the
         grant by Debtor of a security interest pursuant to this Agreement in
         any accounts receivable or any money or other amounts due or to become
         due under such agreement or instrument.

                  "Trademark Security Agreement" means a trademark security
         agreement executed and delivered by Debtor to Secured Party,
         substantially in the form of Exhibit C, as such agreement may be
         amended, supplemented or otherwise modified from time to time.

                  "Trademarks" means all of the following: (a) all trademarks,
         trade names, corporate names, company names, business names, fictitious
         business names, trade styles, service marks, logos, other business
         identifiers, prints and labels on which any of the foregoing have
         appeared or appear, all registrations and recordings thereof and all
         applications in connection therewith, including, without limitation,
         registrations, recordings and applications in the United States Patent
         and Trademark Office or in any similar office or agency of the U.S.,
         any state thereof or any other country or any political subdivision
         thereof, including, without limitation, those described in Schedule 1;
         (b) all reissues, extensions and renewals thereof; (c) all income,
         royalties, damages and payments now or hereafter relating to or payable
         under any of the foregoing, including, without limitation, damages or
         payments for past or future infringements of any of the foregoing; (e)
         the right to sue for past, present and future infringements of any of
         the foregoing; (f) all rights corresponding to any of the foregoing
         throughout the world; and (g) all goodwill associated with and
         symbolized by any of the foregoing; in each case, whether now owned or
         hereafter acquired by Debtor.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 11
<PAGE>


                  "UCC" means the Uniform Commercial Code as in effect on or
         after the date hereof in the State of New York and/or any other
         jurisdiction, the laws of which may be applicable to or in connection
         with the creation, perfection or priority, or the effect of perfection
         or non-perfection, of any Lien on any Property created or purported to
         be created pursuant to this Agreement, and includes, without
         limitation, Revised Article 9 as enacted in the State of New York
         and/or any other such jurisdiction.

                  "Uncertificated Security" means any "uncertificated security,"
         as such term is defined in Article or Chapter 8 of the UCC, and in any
         event shall include, but not be limited to, any Security that is not
         represented by a certificate.

                  "U.S." means the United States of America.

                  "U.S. Subsidiary" means, with respect to any Person, each
         direct or indirect Subsidiary of such Person formed under the laws of
         the U.S. or any state thereof.

         Section 1.2 Other Definitional Provisions. Terms used herein that are
defined in the Restated Lease Agreement and are not otherwise defined herein
shall have the meanings therefor specified in the Restated Lease Agreement.
References to "Sections," "Subsections," "Exhibits" and "Schedules" shall be to
Sections, Subsections, Exhibits and Schedules, respectively, of this Agreement
unless otherwise specifically provided. All definitions contained in this
Agreement are equally applicable to the singular and plural forms of the terms
defined. All references to statutes and regulations shall include any amendments
of the same and any successor statutes and regulations. References to particular
sections of the UCC should be read to refer also to parallel sections of the
Uniform Commercial Code as enacted in each state or other jurisdiction where any
portion of the Collateral is or may be located. Terms used herein which are
defined in the UCC, unless otherwise defined herein or in the Restated Lease
Agreement, shall have the meanings determined in accordance with the UCC. The
term "continuing", "continuation" or "continuance" means, in reference to any
Default or Event of Default that has occurred, that such Default or Event of
Default has not been either cured to the reasonable satisfaction of Secured
Party within the applicable grace period (if any) specified in this Agreement or
waived in writing by Secured Party in accordance with the Restated Lease
Agreement.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 12
<PAGE>


                                    ARTICLE 2

                                Security Interest
                                -----------------

         Section 2.1 Security Interest. As collateral security for the prompt
payment and performance in full when due of the Obligations (whether at stated
maturity, by acceleration or otherwise), Debtor hereby pledges and assigns (as
collateral) to Secured Party, and grants to Secured Party a continuing Lien on
and security interest in, all of Debtor's right, title and interest in and to
the following, whether now owned or hereafter arising or acquired and wherever
located (collectively, the "Collateral"), and such grant, insofar as it applies
to Collateral covered by the Master Lease Agreement, is in confirmation of the
existing and continuing Lien and security interest granted under the Master
Lease Agreement:

                  (a) all Accounts;

                  (b) all Chattel Paper;

                  (c) all Instruments;

                  (d) all General Intangibles (including payment intangibles and
         Software);

                  (e) all Documents;

                  (f) all Equipment (including, without limitation, Equipment at
         the locations set forth on Schedule 4);

                  (g) all Fixtures;

                  (h) all Letter of Credit Rights;

                  (i) all Inventory (including, without limitation, Inventory at
         the locations set forth on Schedule 4);

                  (j) all Intellectual Property;

                  (k) all Financial Assets and Investment Property, and the
         certificates and all dividends, cash, instruments and other Property
         from time to time received, receivable or otherwise distributed or
         distributable in respect of or in exchange for any or all of such
         Financial Assets and Investment Property, including, without
         limitation:

                      (i)  all of the Pledged Shares and the certificates (if
                           any) representing the Pledged Shares, and all
                           dividends, cash, Instruments, and other Property from
                           time to time received, receivable, or otherwise


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 13
<PAGE>


                  distributed or distributable in respect of or in exchange for
                  any or all of the Pledged Shares; and

                      (ii) all additional Capital Stock from time to time owned
                           or acquired by Debtor in any manner, and all
                           dividends, cash, Instruments, and other Property from
                           time to time received, receivable, or otherwise
                           distributed or distributable in respect of or in
                           exchange for any or all of such Capital Stock;
                           provided, no Capital Stock of a Foreign Subsidiary is
                           or shall be pledged pursuant to this Section 2.1(k);

                  (l) all Deposit Accounts;

                  (m) all Money;

                  (n) all Commercial Tort Claims;

                  (o) all indebtedness from time to time owed to Debtor by
         Holdings, any other Credit Party or any other Person and the
         instruments evidencing such indebtedness, and all interest, cash,
         instruments and other Property from time to time received, receivable
         or otherwise distributed or distributable in respect of or in exchange
         for any or all of such indebtedness;

                  (p) all Proceeds, in cash or otherwise, of any of the Property
         described in the foregoing clauses (a) through (o) and all liens,
         security, rights, remedies and claims of Debtor with respect thereto;

                  (q) all other goods and personal Property of Debtor of any
         kind or character, whether tangible or intangible, including, without
         limitation, any and all rights in and claims under insurance policies,
         judgments and rights thereunder, and tort claims; and

                  (r) all Proceeds and products of any or all of the foregoing;

provided, however, that the grant of a Lien on and security interest in Licenses
issued by Governmental Authorities is subject to Section 6.3 hereof.

         Notwithstanding the foregoing, the Collateral shall not include the
Hazelwood Data Center building itself, provided that the foregoing shall not be
deemed to exclude from the Collateral any assets located in the Hazelwood Data
Center.

         Section 2.2 Debtor Remains Liable. Notwithstanding anything to the
contrary contained herein, (a) Debtor shall remain liable under the contracts,
agreements, documents and instruments included in the Collateral to the extent
set forth therein to perform all of its duties and obligations thereunder to the
same extent as if this Agreement had not been executed, (b) the exercise by
Secured Party of any of its rights or remedies hereunder shall not release
Debtor from any of its


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 14
<PAGE>


duties or obligations under the contracts, agreements, documents and instruments
included in the Collateral, and (c) Secured Party shall not have any
indebtedness, liability or obligation under any of the contracts, agreements,
documents and instruments included in the Collateral by reason of this
Agreement, and Secured Party shall not be obligated to perform any of the
obligations or duties of Debtor thereunder or to take any action to collect or
enforce any claim for payment assigned hereunder.

         Section 2.3 Delivery of Collateral. Debtor has delivered to Secured
Party, endorsed in blank as appropriate, all Collateral the possession of which
is necessary to perfect the security interest of Secured Party therein as of the
date hereof. Furthermore, within 10 days of Debtor gaining any rights in any
additional Collateral having a value in excess of $100,000 the possession of
which is necessary to perfect the security interest of Secured Party therein,
all certificates or instruments representing or evidencing the Pledged Shares,
any Instruments or Chattel Paper or any other Collateral including, without
limitation, any Investment Property, shall be delivered to and held by or on
behalf of Secured Party pursuant hereto in suitable form for transfer by
delivery, or accompanied by duly executed instruments of transfer or assignment
in blank, or held in a Deposit Account or by a Securities Intermediary in a
Securities Account pursuant to an agreement among Secured Party, Debtor and such
Securities Intermediary which agreement establishes "control" (as defined in
Article or Chapter 8 of the UCC) of such Securities Account with Secured Party
in one (or more if Secured Party requests) of the manners prescribed in Section
8-106 of the UCC, all in form and substance reasonably satisfactory to Secured
Party. After the occurrence and during the continuation of a Default or an Event
of Default, Secured Party shall have the right at any time to exchange
certificates or instruments representing or evidencing any Pledged Collateral in
its possession for certificates or instruments of smaller or larger
denominations.

                                    ARTICLE 3

                         Representations and Warranties
                         ------------------------------

         To induce Secured Party to enter into this Agreement, Debtor represents
and warrants to Secured Party that:

         Section 3.1 Title. Debtor has rights in and the power to transfer and
grant a security interest in each item of the Collateral upon which it purports
to grant a Lien hereunder free and clear of any Lien or other encumbrance,
except for those Permitted Encumbrances (if any) which are expressly permitted
to attach to the Collateral in accordance with the Restated Lease Agreement and
Liens in favor of Secured Party, and provided, that this Section 3.1 does not
apply to Intellectual Property (which is addressed in Section 3.8 below).

         Section 3.2 Accounts. Unless Debtor has given Secured Party written
notice to the contrary, whenever the security interest granted hereunder
attaches to an Account with a value in excess of $250,000, Debtor shall be
deemed to have represented and warranted to Secured Party as to each of such
Accounts at the time of its creation that (a) each such Account is genuine and
in all respects what it purports to be, (b) each such Account represents the
legal, valid and binding


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 15
<PAGE>


obligation of the account debtor evidencing indebtedness unpaid and owed by such
account debtor, (c) to the best knowledge of Debtor, except for defenses and
business disputes arising in the ordinary course of business which in the
aggregate are not material, the amount of each Account represented as owing is
the correct amount actually and unconditionally owing except for normal trade
discounts granted in the ordinary course of business, (d) Debtor has not
received any notice of proceedings or actions which are threatened or pending
against any account debtor which might result in any adverse change in such
account debtor's financial condition, and (e) no Account is subject to any
offset, counterclaim or other defense (nor is it subject to any threatened
counterclaim to the best knowledge of Debtor) and, except to the extent
otherwise provided in the Restated Lease Agreement, Debtor has not made any
agreement with any account debtor for any extension of time for the payment
thereof, any compromise or settlement for less than the full amount thereof, any
release of any account debtor from liability therefor, or any deduction
therefrom, except a discount or allowance allowed by Debtor in the ordinary
course of business for prompt payment and disclosed to Secured Party.

         Section 3.3 Financing Statements. No financing statement, security
agreement or other Lien instrument covering all or any part of the Collateral is
on file in any public office, except as may have been filed in favor of Secured
Party pursuant to this Agreement and except for financing statements evidencing
Permitted Encumbrances. Except as otherwise disclosed on Schedule 5, Debtor does
not do business and has not done business within the past five years under a
trade name or any name other than its legal name set forth at the beginning of
this Agreement.

         Section 3.4 Principal Place of Business; Organization; Tax I.D. The
principal place of business and "chief executive office", as such term is
defined in Article or Chapter 9 of the UCC, of Debtor, and the office where
Debtor keeps its books and records, is located at the address of Debtor
designated in the introductory paragraph of this Agreement. In addition, each of
the "jurisdiction of organization," as such term is defined in Article or
Chapter 9 of the UCC, the name of Debtor as it appears in official filings in
its jurisdiction of organization, the United States Federal income tax
identification number of Debtor and the organizational identification number or
similar identification number assigned to Debtor by the jurisdiction of
organization of Debtor (if any) is as specified in the introductory paragraph of
this Agreement.

         Section 3.5 Location of Collateral. All Fixtures, Inventory (except
Inventory in transit) and Equipment (other than vehicles) of Debtor constituting
Collateral having a value in excess of $100,000 are located at the places
specified on Schedule 4, provided that pursuant to the terms of Section 6.26 of
the Restated Lease Agreement, Debtor shall have 90 days after the Execution Date
of the Restated Lease Agreement to provide Secured Party with such Schedule 4.
Debtor shall give written notice to Secured Party at least 30 days prior to the
date any such Inventory and/or Equipment is located at any location other than
as set forth on Schedule 4. Except for warehousing and co-location arrangements,
Debtor has exclusive possession and control of its Inventory and Equipment.
Debtor has good, indefeasible and merchantable title to the Inventory and such
Inventory is not subject to any Lien or security interest or document whatsoever
except for the Lien granted to Secured Party, and except for Permitted
Encumbrances. The Inventory is not subject to any licensing, patent, royalty,
trademark, trade name or copyright agreements with any third parties which would
require any consent of any third party upon sale or disposition of that
Inventory or the


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 16
<PAGE>


payment of any monies to any third party upon such sale or other disposition.
The completion of manufacture, sale or other disposition of such Inventory by
Secured Party following an Event of Default shall not require the consent of any
Person and shall not constitute a breach or default under any contract or
agreement to which Debtor is a party or to which such property is subject. None
of such Inventory (other than Inventory as to which all Documents evidencing
such Inventory have been delivered to Secured Party) or Equipment (other than
vehicles) of Debtor constituting Collateral is evidenced by a Document
(including, without limitation, a negotiable document of title).

         Section 3.6 Perfection. Upon the filing of Financing Statements in the
jurisdictions listed on Schedule 6, the filing of a Patent Security Agreement
(if any) and a Trademark Security Agreement (if any) with the United States
Patent and Trademark Office, the filing of a Copyright Security Agreement (if
any) with the United States Copyright Office, and upon Secured Party's obtaining
control of the Investment Property, Deposit Accounts, Electronic Chattel Paper
and Letter of Credit Rights of Debtor constituting Collateral in accordance with
Section 9-314 of the UCC and the corresponding provisions in Sections 9-104,
9-105, 9-106 and 9-107 (as applicable) of the UCC, and upon Secured Party's or
its agents' obtaining possession of the Pledged Shares (or obtaining "control"
(as such term is defined in Article or Chapter 8 of the UCC) of the Pledged
Shares in one (or more if Secured Party so requests) of the manners prescribed
in Section 8-106 of the UCC) and all other Instruments, Chattel Paper and
Security Certificates of Debtor the security interest in favor of Secured Party
created herein will constitute a valid and perfected Lien upon and security
interest in the Collateral (except for (a) vehicles covered by certificates of
title, and (b) other Property excluded from the application of Article or
Chapter 9 of the UCC by Section 9-109(c) and (d) of the UCC, including, without
limitation, fixtures and deposit accounts, and (c) unregistered Intellectual
Property in which a security interest cannot be perfected by said method of
filing with the United States Patent and Trademark Office and the United States
Copyright Office (it being understood that due to uncertainty in the law a
filing may also be required with the United States Patent and Trademark Office
and the United States Copyright Office, which filing cannot be effected prior to
registration of such Intellectual Property)), subject to no equal or prior Liens
except for those Liens (if any) which constitute Permitted Encumbrances and
which are, in accordance with the Restated Lease Agreement permitted to have
priority equal to or greater than the Liens created pursuant to this Agreement.
The Perfection Certificate has been prepared, completed and executed, and the
information set forth therein is correct and complete.

         Section 3.7 [INTENTIONALLY OMITTED.]

         Section 3.8 Intellectual Property.

                  (a) The information contained on Schedule 1 in respect of
         Federally registered Trademarks, registered Copyrights and issued
         Patents, is true, correct and complete.

                  (b) Debtor is the sole and exclusive owner of the entire and
         unencumbered right, title and interest in and to the Intellectual
         Property set forth on Schedule 1 (consisting of Federally registered
         Trademarks, registered Copyrights and issued Patents) free and clear of


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 17
<PAGE>


         any Liens, including, without limitation, any pledges, assignments,
         licenses, user agreements and covenants by Debtor not to sue third
         Persons, other than Permitted Encumbrances.

                  (c) To Debtor's best knowledge, no claim has been made
         alleging that the use of any of the Intellectual Property set forth on
         Schedule 1 violates or may violate the rights of any third Person.

                  (d) Each of the Patents and Trademarks identified on Schedule
         1 as being registered has been properly registered with the United
         States Patent and Trademark Office and each of the Copyrights
         identified on Schedule 1 as being registered has been properly
         registered with the United States Copyright Office.

                  (e) This Security Agreement is effective to create a valid and
         continuing Lien on and, upon filing of Financing Statements in the
         jurisdictions listed on Schedule 6, the recordation of the Copyright
         Security Agreement with the United States Copyright Office and
         recordation of the Patent Security Agreement and the Trademark Security
         Agreement with the United States Patent and Trademark Office, perfected
         Liens in favor of Secured Party on Debtor's Patents, Trademarks and
         Copyrights (it being understood that due to uncertainty in the law a
         filing may also be required with the United States Copyright Office,
         which filing may not be effective prior to registration of such
         Copyrights) and such perfected Liens are enforceable as such as against
         any and all creditors of and purchasers from Debtor.

         Section 3.9 Pledged Shares and Instruments.

                  (a) The Pledged Shares have been duly authorized and validly
         issued and are fully paid and nonassessable under the laws of the
         jurisdiction of incorporation or organization of the issuers thereof.
         To the best knowledge of Debtor, the Instruments have been duly
         authorized and validly issued by the obligor(s) thereunder and
         constitute legally enforceable indebtedness of the obligor(s)
         thereunder.

                  (b) Debtor is the legal and beneficial owner of the Pledged
         Shares and the Instruments, free and clear of any Lien (other than
         Permitted Encumbrances which are, in accordance with the Restated Lease
         Agreement, permitted to attach to the Pledged Shares), and Debtor has
         not sold, granted any option with respect to, assigned, transferred or
         otherwise disposed of any of its rights or interest in or to the
         Pledged Shares or the Instruments.

                  (c) On the date hereof, the Pledged Shares constitute the
         percentage of the issued and outstanding Capital Stock of the issuers
         thereof indicated on Schedule 3, as such Schedule 3 may from time to
         time be supplemented, amended or modified.

         Section 3.10 Control Property. The information on Schedule 4 is true,
correct and complete. All Deposit Accounts, Electronic Chattel Paper, Commercial
Tort Claims and Investment Property, respectively, existing on the date hereof
is identified on Schedule 4.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 18
<PAGE>


         Section 3.11 Benefit. Debtor expects to derive substantial benefit (and
Debtor may reasonably be expected to derive substantial benefit), directly and
indirectly, from continuation of the extension of credit, the execution and
delivery of the Restated Lease Agreement and the other transactions contemplated
therein. Debtor will receive reasonably equivalent value in exchange for the
Collateral being provided by it pursuant to the Restated Lease Agreement to
which it is a party as security for the payment and performance of the
Obligations.

                                    ARTICLE 4

                                    Covenants
                                    ---------

         Debtor covenants and agrees with Secured Party that until the
Obligations are paid and performed in full, the rights and obligations of
Secured Party and the Lessors under the Restated Lease Agreement and all
commitments of Secured Party to extend credit have expired or have been
terminated:

         Section 4.1 Encumbrances. Except as otherwise permitted by the terms of
the Restated Lease Agreement relating to the disposition of assets, Debtor shall
not create, permit or suffer to exist, and shall defend the Collateral against,
any Lien or other encumbrance on the Collateral except for Permitted
Encumbrances which are, in accordance with the Restated Lease Agreement,
permitted to attach to such Collateral, and shall defend Debtor's rights in the
Collateral and Secured Party's pledge and collateral assignment of and security
interest in the Collateral against the claims and demands of all Persons.
Subject to the creation or existence of Permitted Encumbrances under the
Restated Lease Agreement, Debtor shall do nothing to impair the rights of
Secured Party in the Collateral.

         Section 4.2 [INTENTIONALLY OMITTED]

         Section 4.3 Disposition of Collateral. Except as expressly permitted by
the terms of the Restated Lease Agreement, Debtor shall not sell, lease, assign
(by operation of law or otherwise) or otherwise dispose of, or grant any option
with respect to, the Collateral or any part thereof without the prior written
consent of Secured Party.

         Section 4.4 Further Assurances.

                  (a) Generally; Control. At any time and from time to time,
         upon the request of Secured Party, and at the sole expense of Debtor,
         Debtor shall promptly execute and deliver all such further agreements,
         documents and instruments and take such further action as Secured Party
         may reasonably deem necessary or appropriate to preserve and perfect
         its security interest in and pledge and collateral assignment of the
         Collateral and the required priority of such security interest, to
         carry out the terms and provisions and purposes of this Agreement and
         to enable Secured Party to exercise and enforce its rights and remedies
         hereunder with respect to any of the Collateral, whether in
         anticipation of or following the


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 19
<PAGE>


         effectiveness of Revised Article 9 in any jurisdiction, and, without
         limiting the generality of the foregoing, to the extent any of the
         Collateral at any time constitutes Investment Property, Deposit
         Accounts, Electronic Chattel Paper or Letter of Credit Rights, then
         Debtor shall cause Secured Party to obtain control of such Collateral
         in accordance with Section 9-314 of the UCC and the corresponding
         provisions in Sections 9-104, 9-105, 9-106 and 9-107 (as applicable) of
         the UCC, pursuant to agreements establishing such control in form and
         substance reasonably satisfactory to Secured Party.

                  (b) Preservation; Assignments; Intellectual Property. Except
         as otherwise expressly permitted by the terms of the Restated Lease
         Agreement relating to disposition of assets and except for Permitted
         Encumbrances, Debtor agrees to defend the title to the Collateral and
         the Lien thereon of Secured Party against the claim of any other Person
         and to maintain and preserve such Lien. Without limiting the generality
         of the foregoing, Debtor shall (a) execute and deliver to Secured Party
         such financing statements, including transmitting utility filings,
         continuation statements and amendments thereto (collectively,
         "Financing Statements"), as Secured Party may from time to time
         require; (b) deliver and pledge to Secured Party all Documents
         (including, without limitation, all documents of title) evidencing
         Inventory or Equipment having a value in excess of $100,000 (except for
         certificates of title covering vehicles unless otherwise required by
         Secured Party) and cause Secured Party to be named as lienholder on all
         such Documents; (c) deliver and pledge to Secured Party all Instruments
         and Chattel Paper of Debtor having a value in excess of $100,000 with
         any necessary endorsements; (d) if and to the extent required by the
         Restated Lease Agreement, execute and deliver to Secured Party an
         assignment (in form and substance satisfactory to Secured Party) of
         contract rights under any material Contract following (and in any
         event, within ten days after) the execution thereof and obtain from
         each of the parties to each of the material Contracts, other than
         Subsidiaries and affiliates of Savvis who grant security interests in
         such contracts to Secured Party, an agreement in writing, in form and
         substance satisfactory to Secured Party, pursuant to which, among other
         things, such parties consent to the grant of such security interests;
         (e) execute and deliver to Secured Party, at the request of Secured
         Party, all such agreements, documents, instruments and other items as
         may be reasonably necessary or appropriate for Secured Party to create
         and perfect its security interest in the Intellectual Property and to
         make all appropriate filings with respect thereto; and (f) execute and
         deliver to Secured Party such other agreements, documents and
         instruments as Secured Party may reasonably require to perfect and
         maintain the validity, effectiveness and priority of the Liens intended
         to be created by the Restated Lease Agreement.

                  (c) Financing Statements. Debtor authorizes Secured Party to
         file one or more Financing Statements or continuation statements
         relating to all or any part of the Collateral without the signature of
         Debtor where permitted by law. A carbon, photographic or other
         reproduction of this Agreement or of any Financing Statement covering
         the Collateral or any part thereof shall be sufficient as a Financing
         Statement and may be filed as a Financing Statement. Secured Party may,
         at any time and from time to time, pursuant to the provisions of this
         Section 4.4, file Financing Statements that describe the Collateral as
         all assets and/or


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 20
<PAGE>


         all personal Property of Debtor or words of similar effect and which
         contain any other information required by Part 5 of Revised Article 9
         for the sufficiency or filing office acceptance of any Financing
         Statement, including whether Debtor is an organization, the type of
         organization and any organization identification number issued to
         Debtor. Debtor agrees to furnish any such information to Secured Party
         promptly upon request. Any such Financing Statements may be signed by
         Secured Party on behalf of Debtor and may be filed at any time in any
         jurisdiction whether or not Revised Article 9 is then in effect in that
         jurisdiction. Debtor acknowledges that it is not authorized to file any
         Financing Statement or amendment or termination statement with respect
         to any Financing Statement without the prior written consent of Secured
         Party and agrees that it will not do so without the prior written
         consent of Secured Party, subject to Debtor's rights under Section
         9-509(d)(2) of the UCC.

         Section 4.5 Insurance. Debtor shall maintain insurance in the types and
amounts, and under the terms and conditions, specified in Section 5.4(a) of the
Restated Lease Agreement. If applicable, recoveries under any such policy of
insurance shall be paid as provided in Section 5.4(c) of the Restated Lease
Agreement.

         Section 4.6 Bailees. If any of the Collateral is at any time in the
possession or control of any warehouseman, bailee or any of Debtor's agents or
processors, Debtor shall, at the request of Secured Party, notify such
warehouseman, bailee, agent or processor of the security interest created
hereunder, shall instruct such Person to hold such Collateral for Secured
Party's account subject to Secured Party's instructions and shall cause such
Person to acknowledge in writing, in form and substance reasonably satisfactory
to Secured Party, that it holds such Collateral for the benefit of Secured
Party.

         Section 4.7 Inspection Rights. Debtor shall permit Secured Party and
its representatives and agents, during normal business hours and upon reasonable
notice to Debtor, to examine, copy and make extracts from its books and records,
to visit and inspect its Properties and to discuss its business, operations and
financial condition with its officers and independent certified public
accountants. Debtor will authorize its accountants in writing (with a copy to
Secured Party) to comply with this Section. Secured Party and/or its
representatives may, at any time and from time to time at Debtor's expense,
conduct field exams for such purposes as Secured Party may reasonably request
during normal business hours and upon reasonable notice to Debtor.

         Section 4.8 [INTENTIONALLY OMITTED]

         Section 4.9 Corporate Changes. Debtor shall not change its name,
identity, jurisdiction of organization or corporate structure in any manner that
might make any Financing Statement filed in connection with this Agreement
misleading or its United States Federal Tax I.D. Number, in each case unless
Debtor shall have given Secured


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 21
<PAGE>


Party 30 days prior written notice thereof and shall have taken all action
deemed necessary or appropriate by Secured Party to protect its Liens and the
perfection and priority thereof. Debtor shall not change its principal place of
business, chief executive office or the place where it keeps its books and
records unless it shall have given Secured Party 30 days prior written notice
thereof and shall have taken all action deemed necessary or appropriate by
Secured Party to cause its security interest in the Collateral to be perfected
with the priority required by the Credit Documents.

         Section 4.10 Books and Records; Information. Debtor shall maintain
appropriate books of records and accounts in accordance with GAAP where required
by the Restated Lease Agreement consistently applied in which true, full and
correct entries will be made of its dealings and business affairs. Debtor shall
from time to time at the request of Secured Party deliver to Secured Party such
information regarding the Collateral and Debtor as Secured Party may reasonably
request, including, without limitation, lists and descriptions of the Collateral
and evidence of the identity and existence of the Collateral. To the extent
required by Section 4.4, Debtor shall mark its books and records to reflect the
security interest of Secured Party under this Agreement.

         Section 4.11 Equipment, Fixtures and Inventory.

                  (a) Debtor shall keep its Equipment (other than vehicles),
         Fixtures and Inventory (other than Inventory in transit) constituting
         Collateral and having a value in excess of $100,000 at the locations
         specified on Schedule 4 or at such other places within the U.S. where
         all action required to perfect Secured Party's security interest in any
         such Equipment, Fixtures and Inventory with the priority required by
         the Restated Lease Agreement shall have been taken; provided that if
         any such Equipment (other than vehicles), Fixtures or Inventory (other
         than Inventory in transit) is being relocated to any jurisdiction where
         the security interest of Secured Party under this Agreement has not
         been previously perfected, then in such case Debtor shall deliver
         prompt (and in any event within not less than 30 days) notice thereof
         to Secured Party.

                  (b) Debtor shall maintain material Equipment, Fixtures and
         Inventory constituting Collateral in good condition and repair
         (ordinary wear and tear excepted) and in accordance with the terms of
         the Restated Lease Agreement. Debtor shall not permit any waste or
         destruction of such Equipment, Fixtures or Inventory or any part
         thereof. Debtor shall not permit such Equipment, Fixtures or Inventory
         to be used in violation of any law, rule or regulation or the terms of
         any policy of insurance. Debtor shall not use or permit any of such
         Equipment, Fixtures or Inventory to be used in any manner or for any
         purpose that would impair its value or expose it to unusual risk.

                  (c) Within 45 days of the end of each of Debtor's fiscal
         quarters, Debtor shall provide Secured Party with a report setting
         forth in reasonable detail any change during such preceding fiscal
         quarter of the location of any Equipment, Fixtures or Inventory (unless
         such location is one of the locations already specified on Schedule 4)
         constituting Collateral.

         Section 4.12 Warehouse Receipts Non-Negotiable. Debtor agrees that if
any warehouse receipt or receipt in the nature of a warehouse receipt is issued
in respect of any of the Collateral, such warehouse receipt or receipt in the
nature thereof shall not be "negotiable" (as such term is used in Section 7.104
of the UCC) unless such warehouse receipt or receipt in the nature thereof is


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 22
<PAGE>


delivered to Secured Party; provided, however, that Debtor shall not be required
to deliver any warehouse receipt pursuant to this Section 4.12 unless the fair
market value of such warehouse receipt exceeds $100,000; provided, further,
however, the aggregate fair market value of all warehouse receipts which have
not been delivered to Secured Party pursuant to this Section 4.12 shall not at
any time exceed $250,000.

         Section 4.13 Notification. Debtor shall promptly notify Secured Party
of (a) any Lien, encumbrance or claim (other than Permitted Encumbrances) that
has attached to or been made or asserted against any of the Collateral, (b) any
material change in any of the Collateral, including, without limitation, any
material damage to or loss of Collateral, and (c) the occurrence of any other
event or condition (including, without limitation, matters as to Lien priority)
that could reasonably be expected to have a material adverse effect on the
Collateral or the security interest created hereunder.

         Section 4.14 [INTENTIONALLY OMITTED]

         Section 4.15 Intellectual Property. Except with the written consent of
Secured Party:

                  (a) If Debtor shall obtain rights to or become entitled to the
         benefit of any Intellectual Property not identified on Schedule 1, the
         provisions of this Agreement shall automatically apply thereto. Debtor
         shall undertake to modify or update Schedule 1 to include any such new
         Intellectual Property and hereby authorizes Secured Party to modify or
         update Schedule 1 to include any such new Intellectual Property in the
         event Debtor fails to timely modify or update Schedule 1 upon written
         notice from Secured Party;

                  (b) Upon the occurrence of any event that would require any
         addition to or modification of Schedule 1 or upon the request of
         Secured Party, Debtor shall furnish to Secured Party statements and
         schedules further identifying the Intellectual Property and such other
         items in connection with the Intellectual Property as Secured Party may
         request. Promptly upon the request of Secured Party, Debtor shall
         modify this Agreement by amending Schedule 1 to include any
         Intellectual Property that becomes part of the Collateral;

                  (c) If an Event of Default shall have occurred and be
         continuing, Debtor shall use its best efforts to obtain any consents,
         waivers or agreements necessary to enable Secured Party to exercise its
         rights and remedies with respect to the Intellectual Property; and

                  (d) Debtor shall, at the request of Secured Party, execute and
         deliver to Secured Party a Copyright Security Agreement, a Patent
         Security Agreement, a Trademark Security Agreement and all other
         agreements, documents, instruments and other items as may be necessary
         for Secured Party to file such agreements with the United States
         Copyright Office, the United States Patent and Trademark Office and any
         similar domestic or foreign office, department or agency. Debtor will,
         at any time and from time to time upon the request of Secured Party,
         execute and deliver to Secured Party all such other agreements,
         documents, instruments and other items as may be necessary or
         appropriate for Secured Party to create


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 23
<PAGE>


         and perfect its security interest in the Intellectual Property and to
         make all appropriate filings with respect thereto.

         Section 4.16 Voting Rights, Distributions, Etc.

                  (a) So long as no Event of Default shall have occurred and be
         continuing:

                           (i) Debtor shall be entitled to exercise any and all
                  voting and other consensual rights (including, without
                  limitation, the right to give consents, waivers and
                  notifications in respect of any of the Pledged Collateral)
                  pertaining to any of the Pledged Collateral or any part
                  thereof; and

                           (ii) Unless an Event of Default shall have occurred
                  and be continuing, Debtor shall be entitled to receive and
                  retain any and all dividends and interest paid in respect of
                  any of the Collateral to the extent permitted by the Restated
                  Lease Agreement; provided, however, that any and all

                                    (A) Restricted Payments paid or payable in
                           violation of the terms of the Restated Lease
                           Agreement,

                                    (B) Restricted Payments paid or payable
                           other than in cash in respect of, and instruments and
                           other Property received, receivable or otherwise
                           distributed in respect of, or in exchange for, any
                           Collateral,

                                    (C) Restricted Payments hereafter paid or
                           payable in cash in respect of any Collateral in
                           connection with a partial or total liquidation or
                           dissolution or in connection with a reduction of
                           capital, capital surplus or paid-in-surplus, and

                                    (D) cash paid, payable or otherwise
                           distributed in redemption of, or in exchange for, any
                           Collateral,

         shall be, and shall be forthwith delivered to Secured Party to hold as,
         Collateral and shall, if received by Debtor, be received in trust for
         the benefit of Secured Party, be segregated from the other Property or
         funds of Debtor and be forthwith delivered to Secured Party as
         Collateral in the same form as so received (with any necessary
         endorsement). All amounts (other than amounts described in clauses
         (ii)(A) through (D) above) received by Secured Party in respect of any
         Pledged Collateral shall be either (1) promptly released to Debtor, so
         long as no Default or Event of Default shall have occurred and be
         continuing or (2) if any Default or Event of Default shall have
         occurred and be continuing, held by Secured Party and (if an Event of
         Default shall have occurred and be continuing) applied as provided by
         the Credit Agreement. During the continuance of any Default, any
         dividends, interest or other distributions (whether in cash,
         securities, Property or otherwise) received by Debtor with respect to
         any Collateral shall be held by Debtor in trust for the benefit of
         Secured Party and


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 24
<PAGE>


         during the continuance of any Event of Default, upon the request of
         Secured Party, shall be delivered promptly to Secured Party to hold as
         Collateral or shall be applied by Secured Party toward payment of the
         Obligations, as Secured Party may in its discretion determine. If such
         Event of Default is waived or cured to the satisfaction of Secured
         Party, any such distributions received by Secured Party (except those
         of the types described in clauses (ii)(A) through (D) above which shall
         not be released to Debtor) shall be returned promptly to Debtor
         (provided that no other Default or Event of Default exists).

                  (b) Upon the occurrence and during the continuance of an Event
         of Default:

                           (i) Secured Party may, without notice to Debtor,
                  transfer or register in the name of Secured Party or any of
                  its nominees any or all of the Collateral described in Section
                  2.1(k) or Section 2.1(o), the proceeds thereof (in cash or
                  otherwise) and all liens, security, rights, remedies and
                  claims of Debtor with respect thereto (collectively, the
                  "Pledged Collateral") held by Secured Party hereunder, and
                  Secured Party or its nominee may thereafter, after delivery of
                  notice to Debtor, exercise all voting and corporate rights at
                  any meeting of any corporation, partnership or other business
                  entity issuing any of the Pledged Collateral and any and all
                  rights of conversion, exchange, subscription or any other
                  rights, privileges or options pertaining to any of the Pledged
                  Collateral as if it were the absolute owner thereof,
                  including, without limitation, the right to exchange at its
                  discretion any and all of the Pledged Collateral upon the
                  merger, consolidation, reorganization, recapitalization or
                  other readjustment of any corporation, partnership or other
                  business entity issuing any of such Pledged Collateral or upon
                  the exercise by any such issuer or Secured Party of any right,
                  privilege or option pertaining to any of the Pledged
                  Collateral, and in connection therewith, to deposit and
                  deliver any and all of the Pledged Collateral with any
                  committee, depositary, transfer agent, registrar or other
                  designated agency upon such terms and conditions as it may
                  determine, all without liability except to account for
                  Property actually received by it, but Secured Party shall have
                  no duty to exercise any of the aforesaid rights, privileges or
                  options, and neither Secured Party nor any Lessor shall be
                  responsible for any failure to do so or delay in so doing;

                           (ii) All rights of Debtor to exercise the voting and
                  other consensual rights which it would otherwise be entitled
                  to exercise pursuant to Section 4.16(a)(i) and to receive the
                  dividends, interest and other distributions which it would
                  otherwise be authorized to receive and retain pursuant to
                  Section 4.16(a)(ii) shall be suspended until such Event of
                  Default shall no longer exist, and all such rights shall,
                  until such Event of Default shall no longer exist, thereupon
                  become vested in Secured Party which shall thereupon have the
                  sole right to exercise such voting and other consensual rights
                  and to receive and hold as Pledged Collateral such dividends,
                  interest and other distributions;

                           (iii) All dividends, interest and other distributions
                  which are received by Debtor contrary to the provisions of
                  this Section 4.16(b) shall be received in trust for


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 25
<PAGE>


                  the benefit of Secured Party, shall be segregated from other
                  funds of Debtor and shall be forthwith paid over to Secured
                  Party as Collateral in the same form as so received (with any
                  necessary endorsement); and

                           (iv) Debtor shall execute and deliver (or cause to be
                  executed and delivered) to Secured Party all such proxies and
                  other instruments as Secured Party may request for the purpose
                  of enabling Secured Party to exercise the voting and other
                  rights which it is entitled to exercise pursuant to this
                  Section 4.16(b) and to receive the dividends, interest and
                  other distributions which it is entitled to receive and retain
                  pursuant to this Section 4.16(b). The foregoing shall not in
                  any way limit Secured Party's power and authority granted
                  pursuant to Section 5.1.

         Section 4.17 Transfers and Other Liens; Additional Investments.

                  (a) Except as may be expressly permitted by the terms of the
         Restated Lease Agreement, Debtor shall not grant any option with
         respect to, exchange, sell or otherwise dispose of any of the
         Collateral or create or permit to exist any Lien upon or with respect
         to any of the Collateral except for the Liens created hereby and
         Permitted Encumbrances which are, in accordance with the Restated Lease
         Agreement, permitted to attach to such Collateral.

                  (b) Debtor agrees that it will (i) cause its U.S. Subsidiaries
         not to issue any Capital Stock, notes or other securities or
         instruments in addition to or in substitution for any of the Pledged
         Shares, except (A) with prior written notice to Secured Party, to
         Debtor or (B) with the written consent of Secured Party, to any Person
         other than Debtor, (ii) pledge hereunder, immediately upon its
         acquisition (directly or indirectly) thereof, any and all such Capital
         Stock, notes or other securities or instruments, issued to Debtor or
         received in addition to or substituted for any of the Pledged
         Collateral, and (iii) promptly (and in any event within three Business
         Days) deliver to Secured Party an Amendment, duly executed by Debtor,
         in substantially the form of Exhibit D (an "Amendment"), in respect of
         such Capital Stock, notes or other securities or instruments, and
         deliver all certificates, notes or other securities or instruments
         representing or evidencing the same to Secured Party. Debtor hereby (1)
         authorizes Secured Party to attach each Amendment to this Agreement,
         and (2) agrees that all such Capital Stock, notes or other securities
         or instruments listed on any Amendment delivered to Secured Party shall
         for all purposes hereunder constitute Pledged Collateral.

         Section 4.18 Possession; Reasonable Care. Regardless of whether a
Default or an Event of Default has occurred or is continuing, Secured Party
shall have the right to hold in its possession all Instruments, Chattel Paper,
Pledged Collateral and other Collateral as to which possession thereof by
Secured Party is necessary or appropriate to perfect its Lien therein. Secured
Party may, from time to time, in its sole discretion, appoint one or more agents
(which in no case shall be Debtor or an Affiliate of Debtor) to hold physical
custody, for the account of Secured Party, of any or all of the Collateral.
Secured Party shall be deemed to have exercised reasonable care in the custody
and preservation of the Collateral in its possession if the Collateral is
accorded treatment substantially


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 26
<PAGE>


equal to that which Secured Party accords its own Property, it being understood
that Secured Party shall not have any responsibility for (a) ascertaining or
taking action with respect to calls, conversions, exchanges, maturities, tenders
or other matters relative to any Collateral, whether or not Secured Party has or
is deemed to have knowledge of such matters, or (b) taking any necessary steps
to preserve rights against any parties with respect to any Collateral. Following
the occurrence and during the continuation of an Event of Default, Secured Party
shall be entitled to take possession of all of the Collateral.

         Section 4.19 Acknowledgment of Collateral Assignment of Deposit
Accounts. Debtor shall deliver to Secured Party, within 45 days of the execution
hereof and at any time as Secured Party may request thereafter, acknowledgment
by each financial institution in which any Deposit Account is held or maintained
that the collateral assignment of such Deposit Account has been recorded in the
books and records of such financial institution, and that Secured Party shall
have dominion and control over such Deposit Account, such acknowledgment to be
in form and substance satisfactory to Secured Party.

         Section 4.20 Statement of Account on Deposit Accounts. Debtor shall,
from time to time upon written request of Secured Party, provide to Secured
Party a copy of any requested statement of account on any Deposit Account
received by Debtor from the financial institution in which a Deposit Account is
held or maintained. At Secured Party's request, Debtor will use its reasonable
efforts to make such arrangements as are necessary or appropriate in order to
enable Secured Party to access such information by inquiry of an officer or
other representative of any such financial institution or via any automated
information system which may be maintained by such financial institution.

         Section 4.21 Commercial Tort Claims. If any responsible officer of
Debtor shall at any time, whether or not Revised Article 9 is in effect in any
particular jurisdiction, become aware that Debtor has acquired (a) a Commercial
Tort Claim, as defined in Revised Article 9, in an amount greater than $100,000
or (b) if and to the extent necessary to comply with the succeeding proviso,
other commercial tort claims, as defined in Revised Article 9, Debtor shall
immediately notify Secured Party in a writing signed by Debtor of the details
thereof and grant to Secured Party in such writing a security interest therein
and in the proceeds thereof, all upon the terms of this Agreement, with such
writing to be in form and substance satisfactory to Secured Party; provided,
however, that the aggregate amount of Commercial Tort Claims in which Secured
Party shall not have a perfected security interest shall not at any time exceed
$250,000.

         Section 4.22 Letter-of-Credit Rights. If Debtor becomes the beneficiary
of a Letter of Credit, Debtor shall promptly, and in any event within two (2)
Business Days after becoming a beneficiary, notify Secured Party thereof and
enter into a tri-party agreement with Secured Party and the issuer and/or
confirmation bank with respect to Letter-of-Credit Rights assigning such
Letter-of-Credit Rights to Secured Party and directing all payment thereunder to
the Collection Account, all in form and substance reasonably satisfactory to
Secured Party.

         Section 4.23 Indemnification. In any suit, proceeding or action brought
by Secured Party relating to any Collateral for any sum owing with respect
thereto or to enforce any rights or claims


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 27
<PAGE>


with respect thereto, Debtor will save, indemnify and keep Secured Party
harmless from and against all expense (including reasonable attorneys' fees and
expenses), loss or damage suffered by reason of any defense, setoff,
counterclaim, recoupment or reduction of liability whatsoever of the account
debtor or other Person obligated on the Collateral, arising out of a breach by
Debtor of any obligation thereunder or arising out of any other agreement,
indebtedness or liability at any time owing to, or in favor of, such obligor or
its successors from Debtor, except in the case of Secured Party, to the extent
such expense, loss, or damage is attributable solely to the gross negligence or
willful misconduct of Secured Party as finally determined by a court of
competent jurisdiction. All such obligations of Debtor shall be and remain
enforceable against and only against Debtor and shall not be enforceable against
Secured Party.

                                    ARTICLE 5

                             Rights of Secured Party
                             -----------------------

         Section 5.1 Power of Attorney. Debtor hereby irrevocably constitutes
and appoints Secured Party and any officer or agent thereof, with full power of
substitution, as its true and lawful attorney-in-fact with full irrevocable
power and authority in the name of Debtor or in its own name, to take, after the
occurrence and during the continuance of an Event of Default, any and all action
and to execute any and all documents and instruments which Secured Party at any
time and from time to time deems necessary or desirable to accomplish the
purposes of this Agreement and, without limiting the generality of the
foregoing, Debtor hereby gives Secured Party the power and right on behalf of
Debtor and in its own name to do any of the following after the occurrence and
during the continuance of an Event of Default, without notice to or the consent
of Debtor:

                  (a) to demand, sue for, collect or receive, in the name of
         Debtor or in its own name, any money or Property at any time payable or
         receivable on account of or in exchange for any of the Collateral and,
         in connection therewith, endorse checks, notes, drafts, acceptances,
         money orders, documents of title or any other instruments for the
         payment of money under the Collateral or any policy of insurance set
         forth, specified or required by the Restated Lease Agreement;

                  (b) to pay or discharge taxes, Liens or other encumbrances
         levied or placed on or threatened against the Collateral;

                  (c) to notify post office authorities to change the address
         for delivery of mail of Debtor to an address designated by Secured
         Party and to receive, open and dispose of mail addressed to Debtor;

                  (d) (i) to direct account debtors and any other parties liable
         for any payment under any of the Collateral to make payment of any and
         all monies due and to become due thereunder directly to Secured Party
         or as Secured Party shall direct, provided, that Secured Party shall
         use reasonable efforts to give Debtor prior notice of the form of any
         such communication and Debtor shall have one (1) business day from
         receipt of such notice to


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 28
<PAGE>


         provide input as to the form of such communication, which input may be
         accepted or rejected in the reasonable discretion of Secured Party;
         (ii) to receive payment of and receipt for any and all monies, claims
         and other amounts due and to become due at any time in respect of or
         arising out of any Collateral; (iii) to sign and endorse any invoices,
         freight or express bills, bills of lading, storage or warehouse
         receipts, drafts against debtors, assignments, proxies, stock powers,
         verifications and notices in connection with accounts and other
         documents relating to the Collateral; (iv) to commence and prosecute
         any suit, action or proceeding at law or in equity in any court of
         competent jurisdiction to collect the Collateral or any part thereof
         and to enforce any other right in respect of any Collateral; (v) to
         defend any suit, action or proceeding brought against Debtor with
         respect to any Collateral; (vi) to settle, compromise or adjust any
         suit, action or proceeding described above and, in connection
         therewith, to give such discharges or releases as Secured Party may
         deem appropriate; (vii) to exchange any of the Collateral for other
         Property upon any merger, consolidation, reorganization,
         recapitalization or other readjustment of the issuer thereof and, in
         connection therewith, deposit any of the Collateral with any committee,
         depositary, transfer agent, registrar or other designated agency upon
         such terms as Secured Party may determine; (viii) to add or release any
         guarantor, indorser, surety or other party to any of the Collateral;
         (ix) to renew, extend or otherwise change the terms and conditions of
         any of the Collateral; (x) to grant or issue any exclusive or
         nonexclusive license under or with respect to any of the Intellectual
         Property; (xi) to endorse Debtor's name on all applications, documents,
         papers and instruments necessary or desirable in order for Secured
         Party to use any of the Intellectual Property; (xii) to make, settle,
         compromise or adjust any claims under or pertaining to any of the
         Collateral (including, without limitation, claims under any policy of
         insurance); and (xiii) to sell, transfer, pledge, convey, make any
         agreement with respect to or otherwise deal with any of the Collateral
         as fully and completely as though Secured Party were the absolute owner
         thereof for all purposes, and to do, at Secured Party's option and
         Debtor's expense, at any time, or from time to time, all acts and
         things which Secured Party deems necessary to protect, preserve,
         maintain or realize upon the Collateral and Secured Party's security
         interest therein.

         This power of attorney is a power coupled with an interest and shall be
irrevocable until this Agreement is terminated in accordance with its terms.
Secured Party shall be under no duty to exercise or withhold the exercise of any
of the rights, powers, privileges and options expressly or implicitly granted to
Secured Party in this Agreement, and shall not be liable for any failure to do
so or any delay in doing so. Neither Secured Party nor any Person designated by
Secured Party shall be liable for any act or omission or for any error of
judgment or any mistake of fact or law except for gross negligence or willful
misconduct or as set forth in Section 4.18. This power of attorney is conferred
on Secured Party solely to protect, preserve, maintain and realize upon its
security interest in the Collateral. Secured Party shall not be responsible for
any decline in the value of the Collateral and shall not be required to take any
steps to preserve rights against prior parties or to protect, preserve or
maintain any Lien given to secure the Collateral.

         Section 5.2 Set-off. The Secured Party shall, after the occurrence and
during the continuation of an Event of Default, have the right to set off and
apply against the Obligations, at any


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 29
<PAGE>


time and without notice to Debtor or Savvis, any and all deposits (general or
special, time or demand, provisional or final) or other sums at any time
credited by or owing from the Secured Party to Debtor and although such
Obligations may be unmatured. The rights and remedies of Secured Party and the
Lessors hereunder are in addition to other rights and remedies (including,
without limitation, other rights of setoff) that Secured Party may have.

         Section 5.3 [INTENTIONALLY OMITTED]

         Section 5.4 Performance by Secured Party. If Debtor shall fail to
perform any covenant or agreement contained in this Agreement, Secured Party may
perform or attempt to perform such covenant or agreement on behalf of Debtor. In
such event, Debtor shall, at the request of Secured Party, promptly pay any
amount expended by Secured Party in connection with such performance or
attempted performance to Secured Party, together with interest thereon at the
default rate as described in Section 1.3 of the Restated Lease Agreement from
and including the date of such expenditure to but excluding the date such
expenditure is paid in full. Notwithstanding the foregoing, it is expressly
agreed that Secured Party shall not have any liability or responsibility for the
performance of any indebtedness, liability or obligation of Debtor under this
Agreement.

         Section 5.5 License. If no Event of Default shall have occurred and be
continuing, Debtor shall have the exclusive, non-transferable right and license
to use the Intellectual Property in the ordinary course of business and the
exclusive right to grant to other Persons licenses and sublicenses with respect
to the Intellectual Property for full and fair consideration. Debtor agrees not
to sell or assign its interest in, or grant any sublicense under, the license
granted under this Section 5.5 without the prior written consent of Secured
Party.

         Section 5.6 Change of Depository. In the event of the termination by
any financial institution in which any Deposit Account is maintained of any
agreement with or for the benefit of Secured Party, or if any such financial
institution shall fail to comply with any material provisions of any such
agreement or any instructions of Secured Party in accordance with any such
agreement or this Agreement, or if Secured Party determines in its reasonable
discretion that the financial condition of any such financial institution has
materially deteriorated, Debtor agrees to transfer the affected Deposit
Account(s) to another financial institution reasonably acceptable to Secured
Party and cause such substitute financial institution to execute such agreements
as Secured Party may require, in form and substance acceptable to Secured Party,
to ensure that Secured Party has a perfected, first priority collateral
assignment of or security interest in the Deposit Account(s) held with such
substitute financial institution. If any affected Deposit Account is a lockbox
account, Debtor agrees to notify its account debtors promptly to remit all
payments which were being sent to the terminated Deposit Account directly to the
substitute Deposit Account.

         Section 5.7 Collection of Deposit Accounts. After the occurrence and
during the continuation of an Event of Default, upon written demand from Secured
Party to any financial institution in which any of the Deposit Accounts are
maintained, each such financial institution is hereby authorized and directed by
Debtor to make payment directly to Secured Party of the funds in or credited to
the Deposit Accounts, or such part thereof as Secured Party may request, and
each such


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 30
<PAGE>


financial institution shall be fully protected in relying upon the written
statement of Secured Party that an Event of Default has occurred and is
continuing and that the Deposit Accounts are at the time of such demand assigned
hereunder and that Secured Party is entitled to payment of the Obligations
therefrom. Secured Party's receipt for sums paid to it pursuant to such demand
shall be a full and complete release, discharge and acquittance to the
depository or other financial institution making such payment to the extent of
the amount so paid. Debtor hereby authorizes Secured Party, upon (a) the
occurrence and during the continuation of an Event of Default consisting of
Debtor's failure to make payment of any of the Obligations, or any part thereof,
or (b) any acceleration of the maturity of the Obligations upon the occurrence
of any Event of Default, each as provided in the Restated Lease Agreement, (i)
to withdraw, collect and receipt for any and all funds, securities or other
investments on deposit in or payable on the Deposit Accounts, (ii) on behalf of
Debtor to endorse the name of Debtor upon any checks, drafts or other
instruments payable to Debtor evidencing payment on the Deposit Accounts, and
(iii) to surrender or present for notation of withdrawal the passbook,
certificate or other documents issued to Debtor in connection with the Deposit
Accounts. No power granted herein to Secured Party by Debtor shall terminate
upon any disability of Debtor.

                                    ARTICLE 6

                                     Default
                                     -------

         Section 6.1 Rights and Remedies. If an Event of Default shall have
occurred and be continuing, Secured Party shall have the following rights and
remedies (subject to Section 6.3):

                  (a) In addition to all other rights and remedies granted to
         Secured Party in this Agreement or in the Restated Lease Agreement or
         by applicable law, Secured Party shall have all of the rights and
         remedies of a secured party under the UCC (whether or not the UCC
         applies to the affected Collateral) and Secured Party may also, without
         notice except as specified below, sell the Collateral or any part
         thereof in one or more parcels at public or private sale, at any
         exchange, broker's board or at any of Secured Party's offices or
         elsewhere, for cash, on credit or for future delivery, and upon such
         other terms as Secured Party may deem commercially reasonable or
         otherwise as may be permitted by law. Without limiting the generality
         of the foregoing, Secured Party may (i) without demand or notice to
         Debtor, collect, receive or take possession of the Collateral or any
         part thereof and for that purpose Secured Party may enter upon any
         premises on which the Collateral is located and remove the Collateral
         therefrom or render it inoperable, and/or (ii) sell, lease or otherwise
         dispose of the Collateral, or any part thereof, in one or more parcels
         at a public or private sale or sales, at Secured Party's offices or
         elsewhere, for cash, on credit or for future delivery, and upon such
         other terms as Secured Party may deem commercially reasonable or
         otherwise as may be permitted by law. Secured Party shall have the
         right at any public sale or sales, and, to the extent permitted by
         applicable law, at any private sale or sales, to bid (which bid may be,
         in whole or in part, in the form of cancellation of indebtedness) and
         become a purchaser of the Collateral or any part thereof free of any
         right or equity of redemption on the part of Debtor, which right or
         equity of redemption is hereby expressly waived and released by Debtor.
         Upon the request of Secured Party, Debtor shall assemble the Collateral
         and make it


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 31
<PAGE>


         available to Secured Party at any place designated by Secured Party
         that is reasonably convenient to Debtor and Secured Party. If and to
         the extent that Secured Party is required by applicable law to give
         prior written notice of the time and/or place of any such sale, Debtor
         agrees that Secured Party shall not be obligated to give more than five
         days prior written notice of the time and place of any public sale or
         of the time after which any private sale may take place and that such
         notice shall constitute reasonable notice of such matters. Secured
         Party shall not be obligated to make any sale of Collateral if it shall
         determine not to do so, regardless of the fact that notice of sale of
         Collateral may have been given. Secured Party may, without notice or
         publication, adjourn any public or private sale or cause the same to be
         adjourned from time to time by announcement at the time and place fixed
         for sale, and such sale may, without further notice, be made at the
         time and place to which the same was so adjourned. Debtor shall be
         liable for all expenses of retaking, holding, preparing for sale or the
         like, and all attorneys' fees, legal expenses and other costs and
         expenses incurred by Secured Party in connection with the collection of
         the Obligations and the enforcement of Secured Party's rights under
         this Agreement. Debtor shall remain liable for any deficiency if the
         Proceeds of any sale or other disposition of the Collateral applied to
         the Obligations are insufficient to pay the Obligations in full.
         Secured Party may apply the Collateral against the Obligations in such
         order and manner as Secured Party may elect in its sole discretion.
         Debtor waives all rights of marshaling, valuation and appraisal in
         respect of the Collateral. Any cash held by Secured Party as Collateral
         and all cash proceeds received by Secured Party in respect of any sale
         of, collection from or other realization upon all or any part of the
         Collateral may, in the discretion of Secured Party, be held by Secured
         Party as collateral for, and then or at any time thereafter applied in
         whole or in part by Secured Party against, the Obligations in such
         order as Secured Party shall select. Any surplus of such cash or cash
         proceeds and interest accrued thereon, if any, held by Secured Party
         and remaining after payment in full of all the Obligations shall be
         paid over to Debtor or to whomsoever may be lawfully entitled to
         receive such surplus; provided that Secured Party shall have no
         obligation to invest or otherwise pay interest on any amounts held by
         it in connection with or pursuant to this Agreement.

                  (b) Secured Party may cause any or all of the Collateral held
         by it to be transferred into the name of Secured Party or the name or
         names of Secured Party's nominee or nominees.

                  (c) Secured Party may exercise any and all rights and remedies
         of Debtor under or in respect of the Collateral, including, without
         limitation, any and all rights of Debtor to demand or otherwise require
         payment of any amount under, or performance of any provision of, any of
         the Collateral and any and all voting rights and corporate powers in
         respect of the Collateral.

                  (d) Secured Party may collect or receive all money or Property
         at any time payable or receivable on account of or in exchange for any
         of the Collateral, but shall be under no obligation to do so.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 32
<PAGE>


                  (e) On any sale of the Collateral, Secured Party is hereby
         authorized to comply with any limitation or restriction with which
         compliance is necessary, in the view of Secured Party's counsel, in
         order to avoid any violation of applicable law or in order to obtain
         any required approval of the purchaser or purchasers by any applicable
         Governmental Authority.

                  (f) For purposes of enabling Secured Party to exercise its
         rights and remedies under this Section 6.1 and enabling Secured Party
         and its successors and assigns to enjoy the full benefits of the
         Collateral, Debtor hereby grants to Secured Party an irrevocable,
         nonexclusive license (exercisable without payment of royalty or other
         compensation to Debtor) to use, assign, license or sublicense any of
         the Intellectual Property that constitutes a part of the Collateral,
         including in such license reasonable access to all media in which any
         of the licensed items may be recorded or stored and all computer
         programs used for the completion or printout thereof. This license
         shall also inure to the benefit of all successors, assigns and
         transferees of Secured Party.

                  (g) Secured Party may require that Debtor assign all of its
         right, title and interest in and to the Intellectual Property or any
         part thereof to Secured Party or such other Person as Secured Party may
         designate pursuant to documents satisfactory to Secured Party.

         Section 6.2 Registration Rights, Private Sales, Etc.

                  (a) If Secured Party shall determine to exercise its right to
         sell all or any of the Pledged Shares pursuant to Section 6.1, Debtor
         agrees that, upon the request of Secured Party (which request may be
         made by Secured Party in its sole discretion), Debtor will, at its own
         expense:

                           (i) execute and deliver, and use its best efforts to
                  cause each issuer of any of the Pledged Shares contemplated to
                  be sold and the directors and officers thereof to execute and
                  deliver, all such agreements, documents and instruments, and
                  do or cause to be done all such other acts and things, as may
                  be reasonably necessary or, in the reasonable opinion of
                  Secured Party, advisable to register such Pledged Shares under
                  the provisions of the Securities Act (as hereinafter defined)
                  and to cause the registration statement relating thereto to
                  become effective and to remain effective for such period as
                  prospectuses are required by law to be furnished and to make
                  all amendments and supplements thereto and to the related
                  prospectus which, in the opinion of Secured Party, are
                  necessary or advisable, all in conformity with the
                  requirements of the Securities Act of 1933, as amended from
                  time to time (the "Securities Act") and the rules and
                  regulations of the Securities and Exchange Commission
                  applicable thereto;

                           (ii) if reasonably necessary or, in the reasonable
                  opinion of Secured Party, advisable, use its best efforts to
                  qualify such Pledged Shares under all applicable state
                  securities or "Blue Sky" laws and to obtain all necessary
                  governmental approvals for the sale of such Pledged Shares, as
                  requested by Secured Party;


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 33
<PAGE>


                           (iii) if reasonably necessary or, in the reasonable
                  opinion of Secured Party, advisable, cause each such issuer to
                  make available to its security holders, as soon as
                  practicable, an earnings statement which will satisfy the
                  provisions of Section 11(a) of the Securities Act;

                           (iv) do or cause to be done all such other acts and
                  things as may be reasonably necessary or appropriate to make
                  such sale of the Pledged Shares or any part thereof valid and
                  binding and in compliance with applicable law; and

                           (v) bear all reasonable costs and expenses, including
                  reasonable attorneys' fees, of carrying out its obligations
                  under this Section 6.2.

                  (b) Debtor recognizes that Secured Party may be unable to
         effect a public sale of any or all of the Pledged Shares by reason of
         certain prohibitions contained in the Securities Act and applicable
         state securities laws but may be compelled to resort to one or more
         private sales thereof to a restricted group of purchasers who will be
         obliged to agree, among other things, to acquire such Pledged Shares
         for their own account for investment and not with a view to the
         distribution or resale thereof. Debtor acknowledges and agrees that any
         such private sale may result in prices and other terms less favorable
         to the seller than if such sale were a public sale and, notwithstanding
         such circumstances, agrees that any such private sale shall, to the
         extent permitted by law, be deemed to have been made in a commercially
         reasonable manner. Neither the Secured Party nor the Lessors shall be
         under any obligation to delay a sale of any of the Pledged Shares for
         the period of time necessary to permit the issuer of such securities to
         register such securities under the Securities Act or under any
         applicable state securities laws, even if such issuer would agree to do
         so.

                  (c) Debtor further agrees to do or cause to be done, to the
         extent that Debtor may do so under applicable law, all such other acts
         and things as may be necessary to make such sales or resales of any
         portion or all of the Pledged Shares valid and binding and in
         compliance with any and all applicable laws, regulations, orders,
         writs, injunctions, decrees or awards of any and all courts,
         arbitrators or governmental instrumentalities, domestic or foreign,
         having jurisdiction over any such sale or sales, all at Debtor's
         expense. Debtor further agrees that a breach of any of the covenants
         contained in this Section 6.2 will cause irreparable injury to Secured
         Party and that Secured Party has no adequate remedy at law in respect
         of such breach and, as a consequence, agrees that each and every
         covenant contained in this Section 6.2 shall be specifically
         enforceable against Debtor, and Debtor hereby waives and agrees, to the
         fullest extent permitted by law, not to assert as a defense against an
         action for specific performance of such covenants that (i) Debtor's
         failure to perform such covenants will not cause irreparable injury to
         Secured Party or (ii) Secured Party has an adequate remedy at law in
         respect of such breach. Debtor further acknowledges the impossibility
         of ascertaining the amount of damages which would be suffered by
         Secured Party by reason of a breach of any of the covenants contained
         in this Section 6.2 and, consequently, agrees that, if Debtor shall
         breach any of such covenants and Secured Party shall sue for damages
         for such


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 35
<PAGE>


         breach, Debtor shall pay to Secured Party, as liquidated damages and
         not as a penalty, an aggregate amount equal to the value of the Pledged
         Shares on the date Secured Party shall demand compliance with this
         Section 6.2.

                  (d) DEBTOR HEREBY AGREES TO INDEMNIFY, PROTECT AND SAVE
         HARMLESS SECURED PARTY AND ANY CONTROLLING PERSONS THEREOF WITHIN THE
         MEANING OF THE SECURITIES ACT FROM AND AGAINST ANY AND ALL LIABILITIES,
         SUITS, CLAIMS, COSTS AND EXPENSES (INCLUDING REASONABLE COUNSEL FEES
         AND DISBURSEMENTS) ARISING UNDER THE SECURITIES ACT, THE SECURITIES AND
         EXCHANGE ACT OF 1934, AS AMENDED, ANY APPLICABLE STATE SECURITIES
         STATUTE, OR AT COMMON LAW, OR PURSUANT TO ANY OTHER APPLICABLE LAW IN
         CONNECTION WITH THE SALE OF ANY SECURITIES OR THE EXERCISE OF ANY OTHER
         RIGHT OR REMEDY OF SECURED PARTY, INSOFAR AS SUCH LIABILITIES, SUITS,
         CLAIMS, COSTS AND EXPENSES ARISE OUT OF, OR ARE BASED UPON, ANY UNTRUE
         STATEMENT OR ALLEGED UNTRUE STATEMENT OF A MATERIAL FACT MADE BY DEBTOR
         OR SAVVIS IN CONNECTION WITH THE SALE OR PROPOSED SALE OF ANY PART OF
         THE COLLATERAL, OR ARISES OUT OF, OR IS BASED UPON, THE OMISSION OR
         ALLEGED OMISSION BY DEBTOR OR SAVVIS TO STATE A MATERIAL FACT REQUIRED
         TO BE STATED IN CONNECTION THEREWITH OR NECESSARY TO MAKE THE
         STATEMENTS MADE NOT MISLEADING; PROVIDED, HOWEVER, THAT DEBTOR SHALL
         NOT BE LIABLE IN ANY SUCH CASE TO THE EXTENT THAT ANY SUCH LIABILITIES,
         SUITS, CLAIMS, COSTS AND EXPENSES ARISE OUT OF, OR ARE BASED UPON, ANY
         UNTRUE STATEMENT OR ALLEGED UNTRUE STATEMENT OR OMISSION OR ALLEGED
         OMISSION MADE IN RELIANCE UPON AND IN CONFORMITY WITH WRITTEN
         INFORMATION FURNISHED TO DEBTOR BY SECURED PARTY SPECIFICALLY FOR
         INCLUSION IN CONNECTION THEREWITH. THE FOREGOING INDEMNITY AGREEMENT IS
         IN ADDITION TO ANY INDEBTEDNESS, LIABILITY OR OBLIGATION THAT DEBTOR
         MAY OTHERWISE HAVE TO SECURED PARTY OR ANY CONTROLLING PERSON THEREOF.

         Section 6.3 Compliance with Laws. Notwithstanding anything to the
contrary contained in the Restated Lease Agreement or in any other agreement,
instrument or document executed by Debtor and delivered to Secured Party,
Secured Party will not take any action pursuant to this Agreement or any
document referred to herein which would constitute or result in any assignment
of any FCC License or any change of control (whether de jure or de facto) of
Debtor if such assignment of any FCC License or change of control would require,
under then existing law, the prior approval of the FCC or any other Governmental
Authority without first obtaining such prior approval of the FCC or other
Governmental Authority. Upon the occurrence of an Event of Default or at any
time thereafter during the continuance thereof, subject to the terms and
conditions of this Agreement, Debtor agrees to take any action which Secured
Party may request in order to obtain from the FCC


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 35
<PAGE>


or such other Governmental Authority such approval as may be necessary to enable
Secured Party to exercise and enjoy the full rights and benefits granted to
Secured Party by this Agreement and the other documents referred to above,
including specifically, at the cost and expense of Debtor, the use of Debtor's
best efforts to assist in obtaining approval of the FCC or such other
Governmental Authority for any action or transaction contemplated by this
Agreement for which such approval is or shall be required by law, and
specifically, without limitation, upon request, to prepare, sign and file with
the FCC or such other Governmental Authority the assignor's or transferor's
portion of any application or applications for consent to the assignment of
License or transfer of control necessary or appropriate under the FCC's or such
other Governmental Authority's rules and regulations for approval of (a) any
sale or other disposition of the Collateral by or on behalf of Secured Party, or
(b) any assumption by Secured Party of voting rights in the Collateral effected
in accordance with the terms of this Agreement.

                                    ARTICLE 7

                                  Miscellaneous
                                  -------------

         Section 7.1 No Waiver; Cumulative Remedies. No failure on the part of
Secured Party to exercise and no delay in exercising, and no course of dealing
with respect to, any right, power or privilege under this Agreement shall
operate as a waiver thereof, nor shall any single or partial exercise of any
right, power or privilege under this Agreement preclude any other or further
exercise thereof or the exercise of any other right, power or privilege. The
rights and remedies provided for in this Agreement are cumulative and not
exclusive of any rights and remedies provided by law.

         Section 7.2 Successors and Assigns. This Agreement shall be binding
upon and inure to the benefit of Debtor and Secured Party and their respective
heirs, successors and permitted assigns, except that Debtor may not assign any
of its rights, indebtedness, liabilities or obligations under this Agreement
without the prior written consent of Secured Party.

         Section 7.3 Entire Agreement; Amendment. THIS AGREEMENT EMBODIES THE
FINAL, ENTIRE AGREEMENT AMONG THE PARTIES HERETO RELATING TO THE SUBJECT MATTER
HEREOF AND SUPERSEDES ANY AND ALL PRIOR COMMITMENTS, AGREEMENTS, REPRESENTATIONS
AND UNDERSTANDINGS, WHETHER WRITTEN OR ORAL, RELATING TO THE SUBJECT MATTER
HEREOF AND MAY NOT BE CONTRADICTED OR VARIED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OR DISCUSSIONS OF THE PARTIES
HERETO. THERE ARE NO UNWRITTEN ORAL AGREEMENTS AMONG THE PARTIES HERETO. The
provisions of this Agreement may be amended or waived only by an instrument in
writing signed by the parties hereto, except as provided in Section 4.15(a).

         Section 7.4 Notices. All notices and other communications provided for
in this Agreement shall be given or made, and shall be deemed effective, as
provided in the Restated Lease Agreement by telecopy or in writing and
telecopied, mailed by certified mail return receipt requested,


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 36
<PAGE>


or delivered to the intended recipient at the "Address for Notices" specified
below its name on the signature pages hereof, or, as to any party, at such other
address as shall be designated by such party in a notice to the other party
given in accordance with this Section 7.4. Except as otherwise provided in this
Agreement, all such communications shall be deemed to have been duly given when
transmitted by telecopy or when personally delivered or, in the case of a mailed
notice, three Business Days after deposit in the mails, in each case given or
addressed as aforesaid; provided, however, that notices to Secured Party shall
be deemed given when received by Secured Party.

         Section 7.5 Governing Law; Submission to Jurisdiction; Service of
Process. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED AND ENFORCED IN
ACCORDANCE WITH, THE INTERNAL LAWS OF THE STATE OF NEW YORK APPLICABLE TO
CONTRACTS MADE AND PERFORMED IN THAT STATE AND ANY APPLICABLE LAWS OF THE UNITED
STATES OF AMERICA. EACH OF THE PARTIES HERETO CONSENTS AND AGREES THAT THE STATE
OR FEDERAL COURTS LOCATED IN NEW YORK COUNTY, CITY OF NEW YORK, NEW YORK SHALL
HAVE EXCLUSIVE JURISDICTION TO HEAR AND DETERMINE ANY CLAIMS OR DISPUTES BETWEEN
THE PARTIES PERTAINING TO THIS AGREEMENT OR ARISING OUT OF OR RELATING TO THIS
AGREEMENT; PROVIDED, THAT THE PARTIES ACKNOWLEDGE THAT ANY APPEALS FROM THOSE
COURTS MAY HAVE TO BE HEARD BY A COURT LOCATED OUTSIDE OF NEW YORK COUNTY AND;
PROVIDED, FURTHER THAT NOTHING IN THIS AGREEMENT SHALL BE DEEMED OR OPERATE TO
PRECLUDE THE SECURED PARTY FROM BRINGING SUIT OR TAKING OTHER LEGAL ACTION IN
ANY OTHER JURISDICTION TO REALIZE ON THE COLLATERAL OR ANY OTHER SECURITY FOR
THE OBLIGATIONS, OR TO ENFORCE A JUDGMENT OR OTHER COURT ORDER IN FAVOR OF THE
SECURED PARTY. DEBTOR EXPRESSLY SUBMITS AND CONSENTS IN ADVANCE TO SUCH
JURISDICTION IN ANY ACTION OR SUIT COMMENCED IN ANY SUCH COURT, AND DEBTOR
HEREBY WAIVES ANY OBJECTION THAT IT MAY HAVE BASED UPON LACK OF PERSONAL
JURISDICTION, IMPROPER VENUE OR FORUM NON CONVENIENS AND HEREBY CONSENTS TO THE
GRANTING OF SUCH LEGAL OR EQUITABLE RELIEF AS IS DEEMED APPROPRIATE BY SUCH
COURT. DEBTOR HEREBY WAIVES PERSONAL SERVICE OF THE SUMMONS, COMPLAINT AND OTHER
PROCESS ISSUED IN ANY SUCH ACTION OR SUIT AND AGREES THAT SERVICE OF SUCH
SUMMONS, COMPLAINTS AND OTHER PROCESS MAY BE MADE BY REGISTERED OR CERTIFIED
MAIL ADDRESSED TO DEBTOR AT ITS ADDRESS FOR NOTICES SET FORTH UNDERNEATH ITS
SIGNATURE HERETO AND THAT SERVICE SO MADE SHALL BE DEEMED COMPLETED UPON THE
EARLIER OF DEBTOR'S ACTUAL RECEIPT THEREOF OR 3 DAYS AFTER DEPOSIT IN THE UNITED
STATES MAILS, PROPER POSTAGE PREPAID.

         Section 7.6 Headings. The headings, captions and arrangements used in
this Agreement are for convenience only and shall not affect the interpretation
of this Agreement.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 37
<PAGE>


         Section 7.7 Survival of Representations and Warranties. All
representations and warranties made in this Agreement or in any certificate
delivered pursuant hereto shall survive the execution and delivery of this
Agreement, and no investigation by Secured Party shall affect the
representations and warranties or the right of Secured Party to rely upon them.

         Section 7.8 Counterparts. This Agreement may be executed in any number
of counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

         Section 7.9 Waiver of Bond. In the event Secured Party seeks to take
possession of any or all of the Collateral by judicial process, Debtor hereby
irrevocably waives any bonds and any surety or security relating thereto that
may be required by applicable law as an incident to such possession, and waives
any demand for possession prior to the commencement of any such suit or action.

         Section 7.10 Severability. Any provision of this Agreement which is
determined by a court of competent jurisdiction to be prohibited or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such prohibition or unenforceability without invalidating the
remaining provisions of this Agreement, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

         Section 7.11 Construction. Debtor and Secured Party acknowledge that
each of them has had the benefit of legal counsel of its own choice and has been
afforded an opportunity to review this Agreement with its legal counsel and that
this Agreement shall be construed as if jointly drafted by Debtor and Secured
Party.

         Section 7.12 Termination. If all of the Obligations shall have been
paid and performed in full and all commitments to extend credit of Secured Party
shall have expired or terminated, Secured Party shall, upon the written request
of, and at the expense of, Debtor, promptly execute and deliver to Debtor a
proper instrument or instruments acknowledging the release and termination of
the security interests created by this Agreement, and shall duly assign and
deliver to Debtor (without recourse and without any representation or warranty
except as may be set forth in Section 4.18 and Section 5.1) such of the
Collateral as may be in the possession of Secured Party and has not previously
been sold or otherwise applied pursuant to this Agreement.

         Section 7.13 Waiver of Jury Trial. TO THE FULLEST EXTENT PERMITTED BY
APPLICABLE LAW, EACH OF THE PARTIES HERETO HEREBY IRREVOCABLY AND EXPRESSLY
WAIVES ALL RIGHT TO A TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM
(WHETHER BASED UPON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR RELATING TO
THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THE ACTIONS OF SECURED
PARTY IN THE NEGOTIATION, ADMINISTRATION OR ENFORCEMENT THEREOF.

         [The remainder of this page has been intentionally left blank.]


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 38
<PAGE>


         IN WITNESS WHEREOF, the parties hereto have duly executed this
Agreement as of the day and year first written above.


                             DEBTOR:
                             -------

                             SAVVIS COMMUNICATIONS CORPORATION,
                             a Missouri corporation


                             By: /s/ Nancy Bridgman Lysinger
                                 -----------------------------------------------
                             Name:   Nancy Bridgman Lysinger
                                   ---------------------------------------------
                             Title:  Vice President and Treasurer
                                    --------------------------------------------


                             Address for Notices:
                             --------------------
                             12851 Worldgate Drive
                             Herndon, Virginia 20170
                             Attention: Chief Financial Officer
                             Telephone: (703) 234-8000
                             Telecopy:  (703) 234-8309

                             With a copy (which shall not constitute notice) to:

                             717 Office Parkway
                             St. Louis, Missouri 63141
                             Attention: General Counsel
                             Telephone: (314) 468-7500
                             Telecopy:  (314) 468-7550


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 39
<PAGE>


                                           SECURED PARTY:
                                           --------------

                                           GENERAL ELECTRIC CAPITAL CORPORATION,
                                           as Agent


                                           By: /s/ Robert Wotten
                                               ---------------------------------
                                           Name:   Robert Wotten
                                                 -------------------------------
                                           Title:  Vice President
                                                  ------------------------------


                                           Address for Notices:
                                           --------------------

                                           10 Riverview Drive
                                           Danbury, Connecticut 06810
                                           Attention: Robert W. Wotten
                                           Telephone: (203) 749-6287
                                           Telecopy:  (203) 749-4530


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 40
<PAGE>


STATE OF New York          )
                                    )
COUNTY OF New York         )


         This instrument was acknowledged before me this 18th day of March,
2002, by Nancy Bridgman Lysinger, the Vice President and Treasurer of SAVVIS
COMMUNICATIONS CORPORATION, a Missouri corporation, on behalf of such
corporation.

                                           /s/ Robert Braumuller
         [SEAL]                            -------------------------------------
                                           Notary Public in and for the State
                                           of New York
                                           Print Name: Robert Braumuller
                                                       -------------------------

My commission expires: 8/2/05




STATE OF Connecticut         )
                                    )
COUNTY OF Fairfield          )


         This instrument was acknowledged before me this 15th day of March,
2002, by Robert Wotten, the Vice President of GENERAL ELECTRIC CAPITAL
CORPORATION, a Delaware corporation, as Agent, on behalf of such corporation.

                                           /s/ Delythe Eugenie Lowry
         [SEAL]                            -------------------------------------
                                           Notary Public in and for the State
                                           of Connecticut
                                           Print Name: Delythe Eugeine Lowry
                                                       -------------------------


My commission expires: 8/31/05


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 41
<PAGE>


                                   SCHEDULE 1
                                   ----------

                              INTELLECTUAL PROPERTY

I.       Patents

U.S. Patent Application Serial Number 09/565,220 for System and Method for
Controlling Access to Computer Racks. Filed May 5, 2000. (No Office Action has
been received to date)

U.S. Patent Application Serial Number 09/314,719 for Multi-Level Broadband
Multimedia Delivery System. Filed May 18, 1999. (No Office Action has been
received to date)

II.      Trademarks

         A.       Debtor has registered the following trademarks:

                  Intelligent IP Networking for Dynamic Companies(R)
                  Miscellaneous Design (Swirl)(R)
                  ProConnect(R)
                  ProLink(R)
                  ProManaged(R)
                  ProManaged Plus(R)
                  ProSecure(R)
                  SAVVIS(R) (Note: The SAVVIS trademark is registered in the US
                  and is registered or registration is pending in over 40 other
                  countries) SAVVIS Communications(R)

         B.       Debtor has applications pending to register the following
                  trademarks:

                  Midrange XchangeSM
                  Proactive NetworkSM

         C.       Debtor claims rights to but has no applications pending to
                  register the following trademarks:

                  Financial XchangeSM
                  Intelligent IP NetworkSM
                  Intelligent IP NetworkingSM
                  Intelligent RackSM
                  Intelligent HostingSM


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 42
<PAGE>


                                   SCHEDULE 1
                                   ----------
                                    Continued

                  PrivateNapsSM
                  SAVVISecureSM
                  SNA-2-XchangeSM
                  Superior Performance by DesignSM

III.     Copyrights

         None.


   SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 43
<PAGE>


                                   SCHEDULE 2
                                   ----------

I.       Investment Property

         None.

II.      Deposit Accounts






















SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 44

<PAGE>


                                   SCHEDULE 2
                                   ----------
                                    Continued

III.     Commercial Tort Claims

         None.

IV.      Letter of Credit

         None.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 46
<PAGE>


                                   SCHEDULE 3
                                   ----------

                                 PLEDGED SHARES

100 shares of common stock of SAVVIS Procurement Corporation.

Debtor's 100% limited liability company membership interest in Global Network
Assets, LLC.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 47
<PAGE>


                                   SCHEDULE 4
                                   ----------

                             LOCATIONS OF COLLATERAL

              TO BE PROVIDED WITHIN 90 DAYS AFTER THE CLOSING DATE.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 48
<PAGE>


                                   SCHEDULE 5
                                   ----------

                              TRADE AND OTHER NAMES

                                      None.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 49
<PAGE>


                                   SCHEDULE 6
                                   ----------

               JURISDICTIONS FOR FILING UCC-1 FINANCING STATEMENTS

Missouri.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 50
<PAGE>


                                    EXHIBIT A
                                    ---------

                          COPYRIGHT SECURITY AGREEMENT


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 51
<PAGE>


                          COPYRIGHT SECURITY AGREEMENT
                          ----------------------------
                       (Savvis Communications Corporation)

         THIS COPYRIGHT SECURITY AGREEMENT ("Agreement") is between Savvis
Communications Corporation, a Missouri corporation ("Debtor"), and General
Electric Capital Corporation, a Delaware corporation, as Agent for itself and
other Lessors from time to time party to the Restated Lease Agreement as defined
below (in such capacity, together with its successors and assigns in such
capacity, "Secured Party"), and as Lessor pursuant to that certain Amended and
Restated Lease Agreement dated as of March 8, 2002 (as the same may be amended,
modified, supplemented, renewed, extended or restated from time to time, the
"Restated Lease Agreement") among Savvis Communications Corporation, a Delaware
corporation, and Secured Party.

                                R E C I T A L S:
                                ----------------

         A. Debtor and Secured Party have entered into that certain Security
Agreement dated as of March __, 2002 (as the same may be amended, modified,
supplemented, renewed, extended or restated from time to time, the "Security
Agreement"; all terms defined in the Security Agreement, wherever used herein,
shall have the same meanings herein as are prescribed by the Security
Agreement).

         B. Pursuant to the terms of the Security Agreement, Debtor has granted
to Secured Party a lien and security interest in all General Intangibles of
Debtor including, without limitation, all of Debtor's right, title, and interest
in, to and under all now owned and hereafter acquired Copyrights and Copyright
Licenses, and all products and Proceeds thereof, to secure the payment of the
Obligations (as defined in the Restated Lease Agreement).

         NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, Debtor hereby grants to Secured
Party a lien and continuing security interest in all of Debtor's right, title,
and interest in, to, and under the following (all of the following items or
types of Property being herein collectively referred to as the "Copyright
Collateral"), whether presently existing or hereafter created or acquired, and
such grant insofar as it applies to Collateral covered by the Master Lease
Agreement (as defined in the Restated Lease Agreement), is in confirmation of
the existing and continuing Lien and security interest granted under the Master
Lease Agreement:

                  (1) each Copyright, each registration of a Copyright
         ("Copyright Registration"), and each application for registration of a
         Copyright ("Copyright Application"), including, without limitation,
         each Copyright, Copyright Registration, and Copyright Application
         referred to in Schedule 1 annexed hereto;

                  (2) each Copyright License, including, without limitation,
         each Copyright License referred to in Schedule 1 annexed hereto; and

                  (3) all products and Proceeds of the foregoing, including,
         without limitation, any claim by Debtor against third parties for past,
         present, or future infringement or breach of any Copyright, Copyright
         Registration, Copyright Application, or Copyright License, including,
         without limitation, any Copyright, Copyright Registration, or Copyright
         License listed in Schedule 1 annexed hereto, and any Copyright
         Registration issued pursuant to a Copyright Application referred to in
         Schedule 1 annexed hereto.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 52
<PAGE>


The lien and security interest contained in this Agreement is granted in
conjunction with the liens and security interests granted to Secured Party
pursuant to the Security Agreement.

         Debtor hereby acknowledges and affirms that the rights and remedies of
Secured Party with respect to the liens and security interests in the Copyright
Collateral made and granted hereby are more fully set forth in the Security
Agreement, the terms and provisions of which are incorporated by reference
herein as if fully set forth herein.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 53
<PAGE>


         IN WITNESS WHEREOF, Debtor has caused this Agreement to be duly
executed by its duly authorized officer as of the date written above.


                                           DEBTOR:
                                           -------

                                           SAVVIS COMMUNICATIONS CORPORATION,
                                           a Missouri corporation


                                           By:
                                               ---------------------------------
                                           Name:
                                                 -------------------------------
                                           Title:
                                                  ------------------------------


                                           SECURED PARTY:
                                           --------------

                                           GENERAL ELECTRIC CAPITAL CORPORATION,
                                           a Delaware corporation, as Agent


                                           By:
                                               ---------------------------------
                                           Name:
                                                 -------------------------------
                                           Title:
                                                  ------------------------------


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 54
<PAGE>


                                 ACKNOWLEDGMENT
                                 --------------

STATE OF ______________    )
                                  )
COUNTY OF _____________    )

         This instrument was acknowledged before me this _____ day of ______,
____ by ______________, as __________of Savvis Communications Corporation, a
Missouri corporation, on behalf of such corporation.


                                           -------------------------------------
         {Seal}                            Notary Public in and for the State of


My commission expires:_____________________




STATE OF ______________    )
                                  )
COUNTY OF _____________    )

         This instrument was acknowledged before me this _____ day of _________,
____, by _______________________, as _____________________ of General Electric
Capital Corporation, a Delaware corporation, as Agent, on behalf of such
corporation.


                                           -------------------------------------
         {Seal}                            Notary Public in and for the State of


My commission expires:_____________________


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 55
<PAGE>


                                   Schedule 1
                                       to
                          Copyright Security Agreement
                          ----------------------------

                                   COPYRIGHTS
                                   ----------
<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------
OWNER OF   COUNTRY OF     COPYRIGHT   APPLICATION OR     REGISTRATION OR   EXPIRATION   TITLE
RECORD     REGISTRATION               REGISTRATION NO.   FILING DATE       DATE
---------------------------------------------------------------------------------------------
<S>        <C>            <C>         <C>                <C>               <C>          <C>

---------------------------------------------------------------------------------------------
</TABLE>


                               COPYRIGHT LICENSES
                               ------------------

--------------------------------------------------------------------------------
NAME OF AGREEMENT               COPYRIGHT               DATE OF AGREEMENT

--------------------------------------------------------------------------------


--------------------------------------------------------------------------------


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 56
<PAGE>


                                    EXHIBIT B
                                    ---------

                            PATENT SECURITY AGREEMENT


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 57
<PAGE>


                            PATENT SECURITY AGREEMENT
                            -------------------------
                       (Savvis Communications Corporation)

         THIS PATENT SECURITY AGREEMENT ("Agreement") is between Savvis
Communications Corporation, a Missouri corporation ("Debtor"), and General
Electric Capital Corporation, a Delaware corporation, as Agent for itself and
other Lessors from time to time party to the Restated Lease Agreement as defined
below (in such capacity, together with its successors and assigns in such
capacity, "Secured Party"), and as Lessor pursuant to that certain Amended and
Restated Lease Agreement dated as of March 8, 2002 (as the same may be amended,
modified, supplemented, renewed, extended or restated from time to time, the
"Restated Lease Agreement") among Savvis Communications Corporation, a Delaware
corporation and Secured Party.

                                R E C I T A L S:
                                ----------------

         A. Debtor and Secured Party have entered into that certain Security
Agreement dated as of March __, 2002 (as the same may be amended, modified,
supplemented, renewed, extended or restated from time to time, the "Security
Agreement"; all terms defined in the Security Agreement, wherever used herein,
shall have the same meanings herein as are prescribed by the Security
Agreement).

         B. Pursuant to the terms of the Security Agreement, Debtor has granted
to Secured Party a lien and security interest in all General Intangibles of
Debtor including, without limitation, all of Debtor's right, title, and interest
in, to and under all now owned and hereafter acquired Patents and Patent
Licenses, and all products and Proceeds thereof, to secure the payment of the
Obligations (as defined in the Restated Lease Agreement).

         NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, Debtor hereby grants to Secured
Party a lien and continuing security interest in all of Debtor's right, title,
and interest in, to, and under the following (all of the following items or
types of Property being herein collectively referred to as the "Patent
Collateral"), whether presently existing or hereafter created or acquired, and
such grant insofar as it applies to Collateral covered by the Master Lease
Agreement (as defined in the Restated Lease Agreement), is in confirmation of
the existing and continuing Lien and security interest granted under the Master
Lease Agreement:

                  (1) each Patent and each application for a Patent ("Patent
         Application"), including, without limitation, each Patent and Patent
         Application referred to in Schedule 1 annexed hereto, together with any
         reissues, continuations, divisions, modifications, substitutions or
         extensions thereof;

                  (2) each Patent License, including, without limitation, each
         Patent License referred to in Schedule 1 annexed hereto; and

                  (3) all products and Proceeds of the foregoing, including,
         without limitation, any claim by Debtor against third parties for past,
         present, or future infringement or breach of any Patent or Patent
         License, including, without limitation, any Patent or Patent License
         referred to in Schedule 1 annexed hereto, and any Patent issued
         pursuant to a Patent Application referred to in Schedule 1 annexed
         hereto.

The lien and security interest contained in this Agreement is granted in
conjunction with the liens and security interests granted to Secured Party
pursuant to the Security Agreement.

SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 58
<PAGE>


         Debtor hereby acknowledges and affirms that the rights and remedies of
Secured Party with respect to the liens and security interests in the Patent
Collateral made and granted hereby are more fully set forth in the Security
Agreement, the terms and provisions of which are incorporated by reference
herein as if fully set forth herein.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 59
<PAGE>


         IN WITNESS WHEREOF, Debtor has caused this Agreement to be duly
executed by its duly authorized officer as of the date written above.


                                           DEBTOR:
                                           -------

                                           SAVVIS COMMUNICATIONS CORPORATION
                                           a Missouri corporation


                                           By:
                                               ---------------------------------
                                           Name:
                                           Title:


                                           SECURED PARTY:
                                           --------------

                                           GENERAL ELECTRIC CAPITAL CORPORATION,
                                           a Delaware corporation, as Agent


                                           By:
                                               ---------------------------------
                                           Name:
                                           Title:


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 60
<PAGE>


                                 ACKNOWLEDGMENT
                                 --------------

STATE OF ______________    )
                                  )
COUNTY OF _____________    )

         This instrument was acknowledged before me this _______ day of
_________, ____, by _____________________, as ___________ of Savvis
Communications Corporation, a Missouri corporation, on behalf of such
corporation.


                                           -------------------------------------
         {Seal}                            Notary Public in and for the State of


My commission expires:_____________________




STATE OF ______________    )
                                  )
COUNTY OF _____________    )

         This instrument was acknowledged before me this ______ day of
_________, ____, by _______________, as _____________ of General Electric
Capital Corporation, a Delaware corporation, as Agent, on behalf of such
corporation.


                                           -------------------------------------
         {Seal}                            Notary Public in and for the State of


My commission expires:_____________________


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 61
<PAGE>


                                   Schedule 1
                                       to
                            Patent Security Agreement
                            -------------------------

                                     PATENTS
                                     -------
<TABLE>
<CAPTION>
-----------------------------------------------------------------------------------------------------
OWNER OF     COUNTRY        PATENT       APPLICATION OR     REGISTRATION OR   ISSUE DATE   EXPIRATION
 RECORD     OF ORIGIN   IDENTIFICATION   REGISTRATION NO.     FILING DATE     (IF KNOWN)      DATE
-----------------------------------------------------------------------------------------------------
<S>         <C>         <C>              <C>                <C>               <C>           <C>


-----------------------------------------------------------------------------------------------------


-----------------------------------------------------------------------------------------------------
</TABLE>


                                 PATENT LICENSES
                                 ---------------

--------------------------------------------------------------------------------

NAME OF AGREEMENT               PATENT               DATE OF AGREEMENT

--------------------------------------------------------------------------------


--------------------------------------------------------------------------------


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 62
<PAGE>


                                    EXHIBIT C
                                    ---------

                          TRADEMARK SECURITY AGREEMENT


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 63
<PAGE>


                          TRADEMARK SECURITY AGREEMENT
                          ----------------------------
                       (Savvis Communications Corporation)

         THIS TRADEMARK SECURITY AGREEMENT ("Agreement") is between Savvis
Communications Corporation, a Missouri corporation ("Debtor"), and General
Electric Capital Corporation, a Delaware corporation, as Agent for itself and
other Lessors from time to time party to the Restated Lease Agreement as defined
below (in such capacity, together with its successors and assigns in such
capacity, "Secured Party"), and as Lessor pursuant to that certain Amended and
Restated Lease Agreement dated as of March 8, 2002 (as the same may be amended,
modified, supplemented, renewed, extended or restated from time to time, the
"Restated Lease Agreement") Savvis Communications Corporation, a Delaware
corporation and Secured Party.

                                R E C I T A L S:
                                ----------------

         A. Debtor and Secured Party have entered into that certain Security
Agreement dated as of March __, 2002 (as the same may be amended, modified,
supplemented, renewed, extended or restated from time to time, the "Security
Agreement"; all terms defined in the Security Agreement, wherever used herein,
shall have the same meanings herein as are prescribed by the Security
Agreement).

         B. Pursuant to the terms of the Security Agreement, Debtor has granted
to Secured Party a lien and security interest in all General Intangibles of
Debtor, including, without limitation, all of Debtor's right, title, and
interest in, to and under all now owned and hereafter acquired Trademarks,
together with the goodwill of the business symbolized by Debtor's Trademarks,
and Trademark Licenses, and all products and Proceeds thereof, to secure the
payment of the Obligations (as defined in the Restated Lease Agreement).

         NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, Debtor hereby grants to Secured
Party a lien and continuing security interest in all of Debtor's right, title,
and interest in, to, and under the following (all of the following items or
types of Property being herein collectively referred to as the "Trademark
Collateral"), whether presently existing or hereafter created or acquired, and
such grant insofar as it applies to Collateral covered by the Master Lease
Agreement (as defined in the Restated Lease Agreement), is in confirmation of
the existing and continuing Lien and security interest granted under the Master
Lease Agreement:

                  (1) each Trademark, trademark registration ("Trademark
         Registration") and trademark application ("Trademark Application"),
         including, without limitation, each Trademark, Trademark Registration
         and Trademark Application referred to in Schedule 1 annexed hereto,
         together with the goodwill of the business symbolized thereby; and

                  (2) each Trademark License, including, without limitation,
         each Trademark License listed in Schedule 1 annexed hereto; and

                  (3) all products and proceeds of the foregoing, including,
         without limitation, any claim by Debtor against third parties for past,
         present or future (a) infringement, dilution or breach of any
         Trademark, Trademark Registration, Trademark Application and Trademark
         License, including, without limitation, any Trademark, Trademark
         Registration and Trademark License referred to in Schedule 1 annexed
         hereto, and any Trademark Registration issued pursuant to a Trademark
         Application referred to in Schedule 1 annexed hereto; or (b) injury to
         the goodwill associated with any Trademark, Trademark Registration and
         Trademark Application.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 64
<PAGE>


The lien and security interest contained in this Agreement is granted in
conjunction with the liens and security interests granted to Secured Party
pursuant to the Security Agreement.

         Debtor hereby acknowledges and affirms that the rights and remedies of
Secured Party with respect to the liens and security interests in the Trademark
Collateral made and granted hereby are more fully set forth in the Security
Agreement, the terms and provisions of which are incorporated by reference
herein as if fully set forth herein.


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 65
<PAGE>


         IN WITNESS WHEREOF, Debtor has caused this Agreement to be duly
executed by its duly authorized officer as of the date written above.


                                           DEBTOR:
                                           -------

                                           SAVVIS COMMUNICATIONS CORPORATION,
                                           a Missouri corporation


                                           By:
                                               ---------------------------------
                                           Name:
                                           Title:


                                           SECURED PARTY:
                                           --------------

                                           GENERAL ELECTRIC CAPITAL CORPORATION,
                                           a Delaware corporation, as Agent


                                           By:
                                               ---------------------------------
                                           Name:
                                           Title:


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 66
<PAGE>


                                 ACKNOWLEDGMENT
                                 --------------

STATE OF ______________    )
                                  )
COUNTY OF _____________    )

         This instrument was acknowledged before me this _____ day of
___________, 2002, by _____________, as ______________ of Savvis Communications
Corporation, a Missouri corporation, on behalf of such corporation.


                                           -------------------------------------
         {Seal}                            Notary Public in and for the State of


My commission expires:_____________________




STATE OF ______________    )
                                  )
COUNTY OF _____________    )

         This instrument was acknowledged before me this ____ day of _________,
2002, by __________, as ___________ of General Electric Capital Corporation, a
Delaware corporation, as Agent, on behalf of such corporation.


                                           -------------------------------------
         {Seal}                            Notary Public in and for the State of


My commission expires:_____________________


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 67
<PAGE>


                                   Schedule 1
                                       to
                          Trademark Security Agreement
                          ----------------------------
<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------
                                                 TRADEMARKS
------------------------------------------------------------------------------------------------------------------
Trademark          Country          Filing     Application     Registration     Registration     Status     Class/
                                    Date       Number          Date             Number                      Goods
------------------------------------------------------------------------------------------------------------------
<S>                <C>              <C>       <C>              <C>              <C>              <C>        <C>
------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------
</TABLE>


--------------------------------------------------------------------------------
                               TRADEMARK LICENSES
--------------------------------------------------------------------------------
     Name of Agreement               Parties               Date of Agreement
--------------------------------------------------------------------------------


--------------------------------------------------------------------------------


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 68
<PAGE>


                                    EXHIBIT D
                                    ---------

                                FORM OF AMENDMENT


SECURITY AGREEMENT (Savvis Communications Corporation - Missouri) - Page 69
<PAGE>


                         AMENDMENT TO SECURITY AGREEMENT
                         -------------------------------

         This Amendment, dated _______________, _____, is delivered pursuant to
Section 4.16(b) of the Security Agreement referred to below. The undersigned
hereby agrees that this Amendment may be attached to that certain Security
Agreement, dated as of March __, 2002 (the "Security Agreement"), between the
undersigned and General Electric Capital Corporation, as Lessor and Agent for
itself and other Lessors from time to time party to the Restated Lease Agreement
("GE Capital") under that certain Amended and Restated Lease Agreement dated as
of March 8, 2002 between Savvis Communications Corporation, a Delaware
corporation and GE Capital (the "Restated Lease Agreement") and that the Capital
Stock, notes or other securities or instruments listed on Schedule 1 annexed
hereto shall be and become part of the Collateral referred to in the Security
Agreement and shall secure payment and performance of all Obligations as
provided in the Security Agreement.

         Capitalized terms used herein but not defined herein shall have the
meanings therefor provided in the Security Agreement.


                                           SAVVIS COMMUNICATIONS CORPORATION,
                                           a Missouri corporation


                                           By:
                                               ---------------------------------
                                           Name:
                                                 -------------------------------
                                           Title:
                                                  ------------------------------


AMENDMENT TO PLEDGE AND SECURITY AGREEMENT - Solo Page
<PAGE>


                                   Schedule 1
                                       to
                         Amendment to Security Agreement
                         -------------------------------

                                                                   Percentage of
                                                       Number of    Outstanding
             Class of      Certificate                 Shares or       Shares
Issuer    Capital Stock      No(s).       Par Value    Interests    or Interests
------    -------------    -----------    ---------    ---------   -------------




AMENDMENT TO PLEDGE AND SECURITY AGREEMENT - Solo Page
<PAGE>


                                    EXHIBIT E
                                    ---------

                             PERFECTION CERTIFICATE


AMENDMENT TO PLEDGE AND SECURITY AGREEMENT - Solo Page
<PAGE>


                                     FORM OF

                             PERFECTION CERTIFICATE
                             ----------------------

         The undersigned, a _______________, of Savvis Communications
Corporation, a Missouri corporation (the "Debtor") hereby certifies to the
Secured Party as follows:

         SECTION 1. Names. (a) The exact corporate name of the Debtor, as such
name appears in its certificate of incorporation, is as follows:

                  (b) Set forth below is each other corporate name the Debtor
has had in the past five years, together with the date of the relevant change:

                  (c) Except as set forth in Schedule 1 hereto, the Debtor has
not changed its identity or corporate structure in any way within the past five
years. Changes in identity or corporate structure would include mergers,
consolidations and acquisitions, as well as any change in the form, nature or
jurisdiction of corporate organization. If any such change has occurred, include
in Schedule I the information required by Sections 1 and 2 of this certificate
as to each acquiree or constituent party to a merger or consolidation.

                  (d) The following is a list of all other names (including
trade names or similar appellations) used by the Debtor or any of its divisions
or other business units in connection with the conduct of its business or the
ownership of its properties at any time during the past five years:

                  (e) Set forth below is the Federal Taxpayer Identification
Number of the Debtor.

         SECTION 2. Current Locations. (a) The chief executive office of the
Debtor is located (or has been located in the past five (5) years) at the
address set forth opposite its name below:

Debtor              Mailing Address                 County              State
------              ---------------                 ------              -----


AMENDMENT TO PLEDGE AND SECURITY AGREEMENT - Solo Page
<PAGE>


                  (b) Set forth below opposite the name of the Debtor are all
locations where the Debtor maintains (or has maintained in the past 5 years) any
books or records relating to any Account (with each location at which Chattel
Paper, if any, is kept being indicated by an "*"):

Debtor              Mailing Address                 County              State
------              ---------------                 ------              -----


                  (c) Set forth below opposite the name of the Debtor are all
the places of business of the Debtor (at any time in the last 5 years) not
identified in paragraph (a) or (b) above:

Debtor              Mailing Address                 County              State
------              ---------------                 ------              -----


                  (d) Set forth below opposite the name of the Debtor are all
the locations where the Debtor maintains (or has maintained in the last 5 years)
any Collateral not identified above:

Debtor              Mailing Address                 County              State
------              ---------------                 ------              -----


                  (e) Set forth below opposite the name of the Debtor are the
names and addresses of all persons other than the Debtor that have possession
(or have had possession in the past 5 years) of any of the Collateral of the
Debtor:

Debtor              Mailing Address                 County              State
------              ---------------                 ------              -----


         SECTION 3. Unusual Transactions. All Accounts have been originated by
the Debtor and all Inventory has been acquired by the Debtor in the ordinary
course of business.

         SECTION 4. File Search Reports. Attached hereto as Schedule 2 are true
copies of file search reports from the UCC filing offices where filings
described in the Security Agreement are to be made and in all locations set
forth in the listings provided in Section 5 hereof. Attached hereto as Schedule
3 is a true copy of each financing statement or other filings identified in such
file search reports.

         SECTION 5. UCC Filings. Financing statements on Form UCC1 in
substantially the form of Schedule 4 hereto have been prepared for filing in the
UCC filing office in each jurisdiction where such filing is required under
Article 9 of the applicable Uniform Commercial Code in effect after July 1, 2001
and the Debtor has authorized the filing of such financing statements.


AMENDMENT TO PLEDGE AND SECURITY AGREEMENT - Solo Page
<PAGE>


         SECTION 6. Schedule of Filings. Attached hereto as Schedule 5 is a
schedule setting forth, with respect to the filings described in Section 5
above, each filing and the filing officer which such filing is to be made.

         SECTION 7. Filing Fees. All filing fees and taxes payable in connection
with the filings described in Section 5 above will be paid upon filing.


AMENDMENT TO PLEDGE AND SECURITY AGREEMENT - Solo Page
<PAGE>


         IN WITNESS WHEREOF, the parties hereto have duly executed this
Certificate as of the day and year first written above.


                             DEBTOR:
                             -------

                             SAVVIS COMMUNICATIONS CORPORATION,
                             a Missouri corporation


                             By:
                                 -----------------------------------------------
                             Name:
                                   ---------------------------------------------
                             Title:
                                    --------------------------------------------


                             Address for Notices:
                             --------------------
                             12851 Worldgate Drive
                             Herndon, Virginia 20170
                             Attention: Chief Financial Officer
                             Telephone: (703) 234-8000
                             Telecopy:  (703) 234-8309

                             With a copy (which shall not constitute notice) to:

                             717 Office Parkway
                             St. Louis, Missouri 63141
                             Attention: General Counsel
                             Telephone: (314) 468-7500
                             Telecopy:  (314) 468-7550


AMENDMENT TO PLEDGE AND SECURITY AGREEMENT - Solo Page