Document:

<PAGE>

                                                                   EXHIBIT 10.10

Certain confidential portions of this Exhibit were omitted by means of blackout
of the text (the "Mark"). This Exhibit has been filed separately with the
Secretary of the Securities and Exchange Commission without the Mark pursuant to
the Company's Application for Order Granting Confidential Treatment pursuant to
Rule 406 under the Securities Act of 1933, as amended.

             [LETTERHEAD OF INNOVATIVE DRUG DELIVERY SYSTEMS, INC.]

                                                                          [LOGO]

                                                                October 9, 2001

CONFIDENTIAL

Via Facsimile
--- ---------
Dr. Donald E. Morel, Jr.
President and Chief Operating Officer
West Pharmaceutical Services, Inc.
101 Gordon Drive
Lionville, PA 19341

                         Re: Letter Agreement

Dear Don:

Innovative Drug Delivery Systems, Inc. ("IDDS"), West Pharmaceutical Services,
Inc. and West Pharmaceutical Services Drug Delivery & Clinical Research Centre
Ltd. (collectively, "West") have entered into certain agreements with respect to
the licensing, research and development of various pharmaceutical compounds
including but not limited to the License Agreement dated August 25, 2000 (the
"License Agreement"), the Research and Development and Option Agreement related
to nasal midazolam dated September 22, 2000 (the "Nasal Midazolam Option
Agreement") and the Development Milestone and Option Agreement related to nasal
morphine dated September 22, 2000 (the "Nasal Morphine Development Agreement").
IDDS and West now desire to terminate the midazolam project, to amend the
License and Nasal Midazolam Option Agreement, and make certain other
agreements, all as set forth in this letter agreement (the "Letter Agreement").

      1.  Termination of Nasal Midazolam Option Agreement. Pursuant to Section
          6.2.1 of the Nasal Midazolam Option Agreement, the Nasal Midazolam
          Option Agreement is terminated in its entirety as of the date of this
          Letter Agreement. The parties hereby confirm and agree that (i) all
          provisions, rights and obligations that survive termination of the
          Nasal Midazolam Option Agreement pursuant to the terms of that
          agreement shall continue to survive; and (ii) as of the date hereof,
          both parties are in complete satisfaction of all of their obligations
          (financial and otherwise) to the other party in connection with the
          Nasal Midazolam Option Agreement

      2.  Amendment of License Agreement. The License Agreement is hereby
          amended and supplemented as follows:

<PAGE>

Dr. Donald Morel, Jr.
Page Two
October 9, 2001

          a. The parties agree that IDDS's rights and obligations with respect
          to midazolam as set forth in the License Agreement are hereby
          terminated in their entirety. All provisions of the License Agreement
          referring to midazolam (only in so far as they pertain to midazolam)
          shall be null and void and of no further force and effect.

          b. IDDS and West will meet during Q4 2001 to discuss other potential
          applications of West's technology covered under the License Agreement
          in combination with other molecules of interest to IDDS.

          c. IDDS will consider assigning, retaining or hiring a dedicated
          project manager to coordinate all programs and activities with West.
          Until such time, if any, as a dedicated project manager is retained,
          Dr. Leonard Firestone (of IDDS) will continue to coordinate all such
          activities directly with Nick Klutchka (of West).

          d. West shall assist IDDS or its counsel in conducting all
          intellectual property due diligence relating to chitosan,
          nasal-morphine, nasal-fentanyl and any other Licensed Product (as
          defined in the License Agreement) with the exception of nasal
          midazolam and M-6-G. All such reasonable costs, such as
          out-of-pocket expenses incurred in said due diligence will be borne
          by IDDS, to a maximum of $3,000. If it is anticipated that such cap
          will be exceeded, IDDS will be contacted to decide on the appropriate
          next step.

          e. Unless otherwise set forth herein, all other terms of the License
          Agreement shall remain in full force and effect and IIDDS's rights in
          and to Licensed Products (as defined in the License Agreement) other
          than midazolam shall be unaffected by this Letter Agreement.

      3.  Supplement to Nasal Morphine Development Agreement. The parties hereby
          agree that the Nasal Morphine Development Agreement is hereby
          supplemented as follows:

          a. IDDS shall pay West the sum of $*** on or before December 1,
          2001 as transnasal morphine in combination with chitosan advances
          through clinical trials.

          b. IDDS shall commit to spend up to the sum of $*** for Phase II
          clinical trial of transnasal morphine for the treatment of
          breakthrough pain following the parties' agreement on a mutually
          acceptable clinical development plan. This spending will depend on
          market conditions in Q4 2001 and the preclinical development activity
          of fentanyl or some other compound to be named by IDDS. West and IDDS
          would work together on the recognition issues for the $*** to make
          sure that the interests of both parties are taken into account.

*** Represents material which has been omitted pursuant to an Application for
    Order Granting Confidential Treatment and filed separately with the
    Commission.

<PAGE>

Dr. Donald Morel, Jr.
Page Three
October 9, 2001

          c. West shall transfer to the FDA (with a copy to IDDS) all
          documentation necessary for IDDS to own and use, in the name of IDDS,
          the Investigational New Drug application currently held by West for
          transnasalmorphine.

          d. Unless otherwise set forth herein, all other terms of the Nasal
          Morphine Development Agreement shall remain in full force and effect.

This Letter Agreement constitutes our entire agreement with respect to the
subject matter hereof and supersedes all written or oral prior agreements or
understandings with respect thereto and may not be amended without a writing
signed by both parties. This Letter Agreement may be executed in counterparts
and shall be governed by the laws of the Commonwealth of Pennsylvania.

Please sign below in order to acknowledge that the terms set forth above
accurately set forth our mutual understanding, and return an original signed
copy to me.

Faithfully,

/s/ Leonard Firestone
-------------------------------
Leonard Firestone, M.D.
Chief Executive Officer

AGREED TO AND ACCEPTED:
West Pharmaceutical Services, Inc.

By: /s/ Donald E. Morel, Jr.
    --------------------------------
Name:  Dr. Donald E. Morel, Jr.
Title: President and Chief Operating Officer

West Pharmaceutical Services Drug Delivery & Clinical Research Centre Ltd.

By: /s/ Donald E. Morel, Jr.
    ---------------------------------
Name:  Dr. Donald E. Morel, Jr.
Title: Chairman

cc: Daryn Grossman<PAGE>
                                                                    EXHIBIT 10.1

                                    AGREEMENT

                                       AND

                                 PLAN OF MERGER

                                  BY AND AMONG

                           VIANET TECHNOLOGIES, INC.,

                          COMSERVICES ACQUISITION CORP.

                                       AND

                             COMSERVICES CORPORATION

                             DATED December 23, 2001

                                  Page 1 of 43
<PAGE>

                                    CONTENTS

I.       DEFINITIONS...........................................................3

II.      BASIC TRANSACTION.....................................................8

III.     REPRESENTATIONS AND WARRANTIES CONCERNING CSC AND ITS
         SUBSIDIARIES.........................................................11

IV.      REPRESENTATIONS  AND WARRANTIES OF VIANET AND CAC....................27

V.       REPRESENTATIONS AND WARRANTIES CONCERNING VIANET.....................28

VI.      COVENANTS............................................................29

VII.     CONDITIONS TO OBLIGATION TO CLOSE....................................32

VIII.    SURVIVAL AND INDEMNIFICATION.........................................34

IX.      TERMINATION..........................................................37

X.       MISCELLANEOUS........................................................38

                                  Page 2 of 43
<PAGE>

                          AGREEMENT AND PLAN OF MERGER

AGREEMENT AND PLAN OF MERGER ENTERED INTO ON THIS 23rd DAY OF December, 2001 BY
AND AMONG VIANET TECHNOLOGIES, INC., a DELAWARE CORPORATION ("VIANET"),
COMSERVICES ACQUISITION CORP, A DELAWARE CORPORATION AND A WHOLLY OWNED
SUBSIDIARY OF VIANET ("CAC") AND COMSERVICES CORPORATION, A NEVADA CORPORATION
("CSC") (DOING BUSINESS AS COMM-SERVICES CORPORATION), . VIANET, CAC AND CSC ARE
REFERRED TO COLLECTIVELY HEREIN AS THE "PARTIES".

WHEREAS, CSC is in the business of providing wholesale domestic and
international long distance telecommunications services.

WHEREAS, the Parties desire to effect a tax-free reverse subsidiary merger of
CSC into CAC in a reorganization pursuant to Code Sections 368(a)(1)(A) and
368(a)(2)(E) as a result of which Vianet will own all of the issued and
outstanding shares of CSC and the stockholders of CSC will receive shares of
Vianet in exchange for their CSC shares; and

WHEREAS, the Boards of Directors of Vianet, CAC and CSC have approved the Merger
subject to the terms and conditions of this Agreement.

NOW, THEREFORE, in consideration of the premises and the mutual promises herein
made, and in consideration of the representations, warranties, and covenants
herein contained, the Parties agree as follows.

I.   DEFINITIONS

"ADVERSE CONSEQUENCES" means all actions, suits, proceedings, hearings,
investigations, charges, complaints, claims, demands, injunctions, judgments,
orders, decrees, rulings, damages, dues, penalties, fines, costs, amounts paid
in settlement, liabilities, obligations, Taxes, liens, losses, expenses, and
fees, including court costs and reasonable attorneys' fees and expenses.

"AFFILIATE" has the meaning set forth in Rule 12b-2 of the regulations
promulgated under the Securities Exchange Act.

"BASIS" means any past or present fact, situation, circumstance, status,
condition, activity, practice, plan, occurrence, event, incident, action,
failure to act, or transaction that forms or reasonably would be expected to
form the basis for any specified consequence.

"CERTIFICATE OF MERGER" has the meaning set forth in Section II (3) below.

                                  Page 3 of 43
<PAGE>

"CLOSING" has the meaning set forth in Section II (2) below.

"CLOSING DATE" has the meaning set forth in Section II (2) below.

"COBRA" means the requirements of Part 6 of Subtitle B of Title I of ERISA and
Code Section 4980B.

"CODE" means the Internal Revenue Code of 1986, as amended.

"CONFIDENTIAL INFORMATION" means any information concerning the businesses and
affairs of Vianet and CSC and their Subsidiaries that is not already generally
available to the public.

"CONTINGENT SHARES" has the meaning set forth in Exhibit II (4) (d) (i) below.

"CONTROLLED GROUP" has the meaning set forth in Code Section 1563.

"CONVERSION RATIO" has the meaning set forth in Exhibit II (4) (e) (i) below.

"CONVERTIBLE NOTES" has the meanings set forth in Section VII (1) (i).

"CSC" has the meaning set forth in the preface above.

"CSC SHARE" means any share of the Common Stock, $1.00 par value per share, of
CSC issued and outstanding as of the Effective Time.

"CSC STOCKHOLDER" means any Person who or which holds any CSC Shares at the
Effective Time.

"DELAWARE GENERAL CORPORATION LAW" means the General Corporation Law of the
State of Delaware, as amended.

"DISCLOSURE SCHEDULE" has the meaning set forth in Section III below.

"DISSENTING SHARE" means any CSC Share, which any stockholder who or which has
exercised his or its appraisal rights under the Nevada General Corporation Law
holds of record.

"EFFECTIVE TIME" has the meaning set forth in Section II (4) (a) below.

"EMPLOYEE BENEFIT PLAN" means any (a) nonqualified deferred compensation or
retirement plan or arrangement, (b) qualified defined contribution retirement
plan or arrangement which is an Employee Pension Benefit Plan, (c) qualified
defined benefit retirement plan or arrangement which is an Employee Pension
Benefit Plan (including any Multi employer Plan), or (d) Employee Welfare
Benefit Plan or material fringe benefit or other retirement, bonus, or incentive
plan or program.

                                  Page 4 of 43
<PAGE>

"EMPLOYEE PENSION BENEFIT PLAN" has the meaning set forth in ERISA Section 3(2).

"EMPLOYEE WELFARE BENEFIT PLAN" has the meaning set forth in ERISA Section 3(1).

"ENVIRONMENTAL, HEALTH, AND SAFETY REQUIREMENTS" shall mean all federal, state,
local and foreign statutes, regulations, ordinances and other provisions having
the force or effect of law, all judicial and administrative orders and
determinations, all contractual obligations and all common law concerning public
health and safety, worker health and safety, and pollution or protection of the
environment, including without limitation all those relating to the presence,
use, production, generation, handling, transportation, treatment, storage,
disposal, distribution, labeling, testing, processing, discharge, release,
threatened release, control, or cleanup of any hazardous materials, substances
or wastes, chemical substances or mixtures, pesticides, pollutants,
contaminants, toxic chemicals, petroleum products or byproducts, asbestos,
polychlorinated biphenyls, noise or radiation, each as amended and as now or
hereafter in effect.

"ERISA" means the Employee Retirement Income Security Act of 1974, as amended.

"ERISA AFFILIATE" means each entity which is treated as a single employer with
Seller for purposes of Code Section 414.

"EXCHANGE AGENT" has the meaning set forth in Section II (6) (a) (i) below.

"FIDUCIARY" has the meaning set forth in ERISA Section 3(21).

"FINANCIAL STATEMENTS" has the meaning set forth in Section IV (7) below.

"GAAP" means United States generally accepted accounting principles as in effect
from time to time.

"INFORMATION STATEMENT" has the meaning set forth in Section VI (3) below.

"INTELLECTUAL PROPERTY" means (a) all inventions (whether patentable or
unpatentable and whether or not reduced to practice), all improvements thereto,
and all patents, patent applications, and patent disclosures, together with all
reissues, continuations, continuations-in-part, revisions, extensions, and
reexaminations thereof, (b) all registered and unregistered trademarks, service
marks, trade dress, logos, trade names, and corporate names, together with all
translations, adaptations, derivations, and combinations thereof and including
all goodwill associated therewith, and all applications, registrations, and
renewals in connection therewith, (c) all copyrightable works, all copyrights,
and all applications, registrations, and renewals in connection therewith, (d)
all mask works and all applications, registrations, and renewals in connection
therewith, (e) all trade secrets and confidential business information
(including ideas, research and development, know-how, formulas, compositions,
manufacturing and production processes and techniques, technical data, designs,
drawings, specifications, customer and supplier lists, pricing and cost
information, and business and marketing plans and proposals), (f) all computer
software (including data and related documentation), (g) all other proprietary
rights, and (h) all copies and tangible embodiments thereof (in whatever form or
medium).

                                  Page 5 of 43
<PAGE>

"IRS" means the Internal Revenue Service.

"KNOWLEDGE" means actual knowledge after reasonable investigation and inquiry of
the directors, officers and employees of CSC and its Subsidiaries who would
reasonably be expected to have knowledge of a particular matter.

"LIABILITY" means any liability (whether known or unknown, whether asserted or
unasserted, whether absolute or contingent, whether accrued or unaccrued,
whether liquidated or unliquidated, and whether due or to become due), including
any liability for Taxes.

"MATERIAL ADVERSE EFFECT" means a material adverse effect on the assets,
properties, operations or financial condition of CSC and its Subsidiaries, taken
as a whole.

"MERGER" has the meaning set forth in Section II (1) below.

"MERGER CONSIDERATION" has the meaning set forth in Section II (4) (d) (i).

"MOST RECENT BALANCE SHEET" means the balance sheet contained within the Most
Recent Financial Statements.

"MOST RECENT FINANCIAL STATEMENTS" has the meaning set forth in Section IV (7)
below.

"MULTI EMPLOYER PLAN" has the meaning set forth in ERISA Section 3(37)

"NUMBER OF VIANET SHARES TO BE ISSUED TO CSC SHAREHOLDERS" has the meaning set
forth in Exhibit II (4) (d) (i) below.

"OCTOBER 31 BALANCE SHEET" means the balance sheet contained in the October 31,
2001 Financial Statements.

"ORDINARY COURSE OF BUSINESS" means the ordinary course of business consistent
with past custom and practice (including with respect to quantity and
frequency).

"PARTY" has the meaning set forth in the preface above.

"PBGC" means the Pension Benefit Guaranty Corporation.

                                  Page 6 of 43
<PAGE>

"PERSON" means an individual, a partnership, a corporation, a limited liability
company, an association, a joint stock company, a trust, a joint venture, an
unincorporated organization, or a governmental entity (or any department,
agency, or political subdivision thereof).

"PROHIBITED TRANSACTION" has the meaning set forth in ERISA Section 406 and Code
Section 4975.

"REGISTRATION" has the meaning set forth in Section II (7) below.

"REQUISITE CSC STOCKHOLDER APPROVAL" means the affirmative vote of the holders
of eighty percent (80%) of CSC Shares in favor of this Agreement and the Merger.

"REPORTABLE EVENT" has the meaning set forth in ERISA Section 4043.

"SEC" means the Securities and Exchange Commission.

"SECURITIES ACT" means the Securities Act of 1933, as amended.

"SECURITIES EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended.

"SECURITY INTEREST" means any mortgage, pledge, lien, encumbrance, charge, claim
or other security interest, other than (a) mechanic's, material men's, and
similar liens, (b) liens for Taxes not yet due and payable or for Taxes that the
taxpayer is contesting in good faith through appropriate proceedings, (c)
purchase money liens and liens securing rental payments under capital lease
arrangements, and (d) other liens arising in the Ordinary Course of Business and
not incurred in connection with the borrowing of money.

"SUBSIDIARY" means any corporation with respect to which a specified Person (or
a Subsidiary thereof) owns a majority of the common stock or has the power to
vote or direct the voting of sufficient securities to elect a majority of the
directors.

"SURVIVING CORPORATION" has the meaning set forth in Section II (1) below.

"TAX" means any federal, state, local, or foreign income, gross receipts,
license, payroll, employment, excise, severance, stamp, occupation, premium,
windfall profits, environmental (including taxes under Code Section 59A),
customs duties, capital stock, franchise, profits, withholding, social security
(or similar), unemployment, disability, real property, personal property, sales,
use, transfer, registration, value added, alternative or add-on minimum,
estimated, or other tax of any kind whatsoever, including any interest, penalty,
or addition thereto, whether disputed or not.

                                  Page 7 of 43
<PAGE>

"TAX RETURN" means any return, declaration, report, claim for refund, or
information return or statement relating to Taxes, including any schedule or
attachment thereto, and including any amendment thereof.

"THIRD PARTY CLAIM" has the meaning set forth in Section VIII (4) (a) below.

"VIANET" has the meaning set forth in the preface above.

"VIANET SHARE" means any share of Class A Common Stock, $.001 par value per
Share, of Vianet.

II.  BASIC TRANSACTION.

1)   THE MERGER. On and subject to the terms and conditions of this Agreement,
     CSC will merge with and into CAC (the "Merger") at the effective time, CAC
     shall be the corporation surviving the merger (the "Surviving
     Corporation").

2)   THE CLOSING. The Closing of the transactions contemplated by this Agreement
     (the "Closing") shall take place at the offices of Vianet at 6509
     Windcrest, Suite 160, Plano, Texas 75024, commencing at 2:00 p.m. local
     time on December 28, 2001 or such other date and time as the parties may
     mutually determine (the "Closing Date").

3)   ACTIONS AT THE CLOSING. At the Closing, (i) CSC will deliver to Vianet and
     CAC the various certificates, instruments, and documents referred to in
     Section VII below, (ii) Vianet and CAC will deliver to CSC the various
     certificates, instruments, and documents referred to in Section VII below,
     (iii) CSC and CAC will file with the Secretary of State of the State of
     Delaware a Certificate of Merger in the form attached hereto as Exhibit II
     (3) (a) (the "Certificate of Merger"), (iv) CSC and CAC will file the
     required notice with the Secretary of the State of Nevada and any other
     required filings in the form attached hereto as Exhibit II (3) (b), and (v)
     Vianet will deliver to the Exchange Agent in the manner provided below in
     this Section II the certificates evidencing the Vianet Shares issued in the
     Merger.

4)   EFFECT OF MERGER:

     a)  GENERAL. The Merger shall become effective at the time (the "Effective
         Time") CSC and CAC file the Certificate of Merger with the Secretary of
         State of the State of Delaware. The Merger shall have the effect set
         forth in the Delaware General Corporation Law. The Surviving
         Corporation may, at any time after the Effective Time, take any action
         (including executing and delivering any document) in the name and on
         behalf of either CSC or CAC in order to carry out and effectuate the
         transactions contemplated by this Agreement.

     b)  BYLAWS. The name of the Surviving Corporation shall be amended and
         changed to Comm-Services Corporation

                                  Page 8 of 43
<PAGE>

     c)  DIRECTORS AND OFFICERS. The directors and officers of CAC shall become
         the directors and officers of the Surviving Corporation at and as of
         the Effective Time (retaining their respective positions and terms of
         office); provided, however, that Greg Somers shall become the President
         of the Surviving Corporation and Victor Goetz shall become the Chief
         Financial Officer of the Surviving Corporation.

     d)  CONVERSION OF CSC SHARES:

         i)   At and as of the Effective Time, by virtue of the Merger and
              without any action on the part of any party hereto or any holder
              of CSC Shares, each CSC Share (other than any Dissenting Share)
              shall be converted into the right to receive Vianet Shares and a
              cash payment in lieu of fractional Vianet Shares (which, for
              purposes of this Section II (4) (d) (i) shall be valued at $0.10
              per share) (the "Merger Consideration"). (The ratio of Vianet
              Shares to One (1) CSC Share is referred to herein as the
              "Conversion Ratio". The Conversion Ratio shall be determined on
              Closing in accordance with the provisions of Exhibit II (4) (d)
              (i) )

         ii)  all CSC Shares shall no longer be outstanding or issuable and
              shall be canceled and retired and shall cease to exist, and each
              holder thereof shall thereafter cease to have any rights with
              respect to such CSC Shares, and

         iii) each Dissenting Share shall be converted into the right to receive
              payment from the Surviving Corporation with respect thereto in
              accordance with the provisions of the Nevada General Corporation
              Law, provided, however, that the Conversion Ratio shall be subject
              to equitable adjustment in the event of any stock split, stock
              dividend, reverse stock split, of the CSC Shares or the Vianet
              Shares after the date hereof but prior to the Effective Time.

         iv)  No CSC Share shall be deemed to be outstanding or to have any
              rights other than those set forth above in this Section II (4) (d)
              after the Effective Time.

     e)  CONVERSION OF CAPITAL STOCK OF CAC. At and as of the Effective Time,
         each share of Common Stock of CSC shall be converted into one share of
         Common Stock of CAC.

5)   OTHER EFFECTS OF THE MERGER. The Merger shall have the effects set forth in
     the Delaware General Corporation Law and the Nevada General Corporation
     Law. Without limiting the generality of the foregoing, and subject thereto,
     at the Effective Time, all the properties, rights, privileges, powers and
     franchises of CSC and CAC shall vest in the Surviving Corporation, and all
     debts, liabilities and duties of CSC and CAC shall become the debts,
     liabilities and duties of the Surviving Corporation.

6)   PROCEDURE FOR PAYMENT:

     a)  Immediately after the Closing,

                                  Page 9 of 43
<PAGE>

         i)   Vianet will, on behalf of, and for the benefit of CAC furnish to
              Continental Stock Transfer & Trust Company (the "Exchange Agent")
              a stock certificate (issued in the name of the Exchange Agent or
              its nominee) representing that number of Vianet Shares equal to
              the product of (1) the Conversion Ratio times (2) the number of
              outstanding CSC Shares (other than any Dissenting Shares); and

         ii)  Vianet will cause the Exchange Agent to mail a letter of
              transmittal (with instructions for its use) in form and substance
              reasonably satisfactory to the parties hereto to each record
              holder of outstanding CSC Shares for the holder to use in
              surrendering the certificates which represented his or its CSC
              Shares in exchange for a certificate representing the number of
              Vianet Shares to which each of he or it is entitled.

     b)  Vianet will not pay any dividend or make any distribution on Vianet
         Shares (with a record date at or after the Effective Time) to any
         record holder of outstanding CSC Shares until the holder surrenders for
         exchange his or its certificates which represented CSC Shares. Vianet
         instead will pay the dividend or make the distribution to the Exchange
         Agent in trust for the benefit of the holder pending surrender and
         exchange. Vianet may cause the Exchange Agent to invest any cash the
         Exchange Agent receives from Vianet as a dividend or distribution in
         one or more investments; provided however, that the terms and
         conditions of the investments shall be such as to permit the Exchange
         Agent to make prompt payments of cash to the holders of outstanding CSC
         Shares as necessary. Vianet may cause the Exchange Agent to pay over to
         Vianet any net earnings with respect to the investments. In no event,
         however, will any holder of outstanding CSC Shares be entitled to any
         interest or earnings on the dividend or distribution pending receipt.

     c)  Vianet may cause the Exchange Agent to return any Vianet Shares and
         dividends and distributions thereon remaining unclaimed 180 days after
         the Effective Time, and thereafter each remaining record holder of
         outstanding CSC Shares shall be entitled to look to Vianet (subject to
         abandoned property, escheat, and other similar laws) as a general
         creditor thereof with respect to Vianet Shares and dividends and
         distributions thereon to which he or it is entitled upon surrender of
         his or its certificates.

     d)  Vianet shall pay all charges and expenses of the Exchange Agent.

7)   REGISTRATION. Within one hundred and eighty days of the Closing, Vianet
     will file with the SEC such documentation as is necessary to request the
     registration under the Securities Act of the Vianet Shares issued and
     issuable in exchange for the CSC Shares (the "Registration").

8)   CLOSING OF TRANSFER RECORDS. After the close of business on the Closing
     Date, transfers of CSC Shares outstanding prior to the Effective Time shall
     not be made on the stock transfer books of the Surviving Corporation.

                                 Page 10 of 43
<PAGE>

9)   DISSENTING SHARES. Notwithstanding anything in this Agreement to the
     contrary, Dissenting Shares shall not be converted into or be exchangeable
     for the right to receive the Merger Consideration, but, instead, the holder
     thereof shall be entitled to receive such consideration as shall be
     determined pursuant to Section 92A.380 of the Nevada General Corporation
     Law; provided, However, that if such holder shall have failed to perfect or
     shall have effectively withdrawn or lost its rights to dissent under the
     Nevada General Corporation Law, each of such holder's Dissenting Shares
     shall thereupon be deemed to have been converted into and to have become
     exchangeable for the right to receive, as of the Effective Time, the Merger
     Consideration (without any interest thereon) in accordance with Section II
     (4) (d) (i) and such holder shall forfeit its appraisal rights provided by
     Section 92A.380 of the Nevada General Corporation Law. CSC shall give
     Vianet and CAC notice of all such Dissenting Shares and Vianet shall have
     the right to participate in all negotiations and proceedings with respect
     to any demands for payment by the holder of any Dissenting Shares. CSC
     shall not, except with the prior written consent of Vianet, voluntarily
     make or agree to make any payment with respect to, or settle or offer to
     settle, any such demands for payment. At and as of the Effective Time, the
     Surviving Corporation shall assume and be responsible for the satisfaction
     and discharge of all appraisal rights to which holders of Dissenting Shares
     may be entitled under Section 92A.380 of the Nevada General Corporation
     Law.

10)  LEGEND. All certificates evidencing Vianet Shares restricted by this
     Agreement shall bear a legend indicating the existence of the restrictions
     imposed hereby and a stop transfer order may be placed with respect to such
     securities. The legend referred to in the preceding sentence shall be
     substantially in the following form:

                  "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
                  REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. THESE
                  SHARES MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR
                  HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION
                  STATEMENT UNDER SUCH SECURITIES ACT OR AN OPINION OF COUNSEL
                  REASONABLY SATISFACTORY TO VIANET TECHNOLOGIES, INC. THAT SUCH
                  REGISTRATION IS NOT REQUIRED."

The holder of record of each certificate evidencing Vianet Shares shall have the
right to have such legend removed from any certificate representing Vianet
Shares following the registration of the Vianet Shares in accordance with the
Registration Rights Agreement, provided that the shares are sold pursuant to the
registration statement and in accordance with the provisions of Section 5 of the
Securities Act of 1933.

                                 Page 11 of 43
<PAGE>

III.  REPRESENTATIONS AND WARRANTIES CONCERNING CSC AND ITS SUBSIDIARIES.

CSC represents and warrants to Vianet that the statements contained in this
Section III are correct and complete as of the date of this Agreement and will
be correct and complete as of the Closing Date (as though made then and as
though the Closing Date were substituted for the date of this Agreement
throughout this Section III), except as set forth in the disclosure schedule
which will be delivered to Vianet prior to the Closing and initialed by the
Parties (the "Disclosure Schedule"). Nothing in the Disclosure Schedule shall be
deemed adequate to disclose an exception to a representation or warranty made
herein, however, unless the Disclosure Schedule identifies the exception with
particularity and describes the relevant facts in detail. Without limiting the
generality of the foregoing, the mere listing (or inclusion of a copy) of a
document or other item shall not be deemed adequate to disclose an exception to
a representation or warranty made herein (unless the representation or warranty
has to do with the existence of the document or other item itself). The
Disclosure Schedule will be arranged in paragraphs corresponding to the lettered
and numbered paragraphs contained in this Section III.

1)   ORGANIZATION, QUALIFICATION, AND CORPORATE POWER; AUTHORIZATION. Each of
     CSC and its Subsidiaries is a corporation duly organized, validly existing,
     and in good standing under the laws of the jurisdiction of its
     incorporation. Each of CSC and its Subsidiaries is duly authorized to
     conduct business and is in good standing under the laws of each
     jurisdiction where such qualification is required. Each of CSC and its
     Subsidiaries has full corporate power and authority and all licenses,
     permits, and authorizations necessary to carry on the businesses in which
     it is engaged and to own and use the properties owned and used by it.
     Section III (1) of the Disclosure Schedule lists the directors and officers
     of each of CSC and its Subsidiaries. CSC has delivered to Vianet correct
     and complete copies of the charter and bylaws of each of CSC and its
     Subsidiaries (as amended to date). CSC has delivered to Vianet true and
     complete copies of all documents and instruments contained in the minute
     books, the stock certificate books, and the stock record books of each of
     CSC and its Subsidiaries. None of CSC and its Subsidiaries is in default
     under or in violation of any provision of its charter or bylaws. CSC has
     full power and authority to execute and deliver this Agreement and to
     perform its obligations hereunder. This Agreement constitutes the valid and
     legally binding obligation of CSC enforceable in accordance with its terms
     and conditions.

2)   CAPITALIZATION. The entire authorized capital stock of CSC consists of
     1,000 CSC Shares, $1.00 par value, of which 1,000 CSC Shares are issued and
     outstanding and no CSC Shares are held in treasury. All of the issued and
     outstanding CSC Shares have been duly authorized, are validly issued, fully
     paid, and non-assessable, and are held of record by the stockholders as set
     forth in Section III (2) of the Disclosure Schedule. Except as set forth
     and described in Section III (2) of the Disclosure Schedule:

     a)  there are no outstanding or authorized options, warrants, purchase
         rights, subscription rights, conversion rights, exchange rights,
         convertible debentures, stock options or other contracts or commitments
         that could require CSC to issue, sell, or otherwise cause to become
         outstanding any of its capital stock,

                                 Page 12 of 43
<PAGE>

     b)  there are no outstanding or authorized stock appreciation, phantom
         stock, profit participation, or similar rights with respect to CSC; and

     c)  there are no voting trusts, proxies, or other agreements or
         understandings with respect to the voting of the capital stock of CSC.

3)   NON-CONTRAVENTION. Except as set forth in Section III (3) to the Disclosure
     Schedule neither the execution and the delivery of this Agreement nor the
     consummation of the transactions contemplated hereby will

     a)  violate any constitution, statute, regulation, rule, injunction,
         judgment, order, decree, ruling, charge, or other restriction of any
         government, governmental agency, or court to which any of CSC and its
         Subsidiaries is subject or any provision of the charter or bylaws of
         any of CSC and its Subsidiaries; or

     b)  conflict with, result in a breach of, constitute a default under,
         result in the acceleration of, create in any party the right to
         accelerate, terminate, modify, or cancel, or require any notice,
         consent, or approval under any agreement, contract, lease, license,
         instrument, or other arrangement to which any of CSC and its
         Subsidiaries is a party or by which it is bound or to which any of its
         assets is subject (or result in then imposition of any Security
         Interest upon any of its assets).

     None of CSC and its Subsidiaries needs to give any notice to, make any
     filing with, or obtain any authorization, consent, or approval of any
     government or governmental agency in order for the Parties to consummate
     the transactions contemplated by this Agreement.

4)   BROKERS' FEES. None of CSC and its Subsidiaries has any Liability or
     obligation to pay any fees or commissions to any broker, finder, or agent
     with respect to the transactions contemplated by this Agreement.

5)   TITLE TO ASSETS. Except as described in Section III (5) of the Disclosure
     Schedule, CSC and its Subsidiaries have good and marketable title to, or a
     valid leasehold interest in, the properties and assets used by them,
     located on their premises, or shown on the Most Recent Balance Sheet or
     acquired after then date thereof, free and clear of all Security Interests,
     except for properties and assets disposed of in the Ordinary Course of
     Business since the date of the Most Recent Balance Sheet.

6)   SUBSIDIARIES. Section III (6) of the Disclosure Schedule sets forth for
     each Subsidiary of CSC

     a)  (i) its name and jurisdiction of incorporation;

     b)  (ii) the number of shares of authorized capital stock of each class of
         its capital stock;

     c)  (iii) the number of issued and outstanding shares of each class of its
         capital stock, the names of the holders thereof, and the number of
         shares held by each such holder; and

                                 Page 13 of 43
<PAGE>

     d)  (iv) the number of shares of its capital stock held in treasury.

     Except as described in Section III (6) to the Disclosure Schedule, all of
     the issued and outstanding shares of capital stock of each Subsidiary of
     CSC have been duly authorized and are validly issued, fully paid, and
     non-assessable. Except as described in Section III (6) to the Disclosure
     Schedule, CSC holds of record and owns beneficially all of the outstanding
     shares of each Subsidiary of CSC free and clear of any restrictions on
     transfer (other than restrictions under the Securities Act and state
     securities laws), Taxes, Security Interests, options, warrants, purchase
     rights, contracts, commitments, equities, claims, and demands. There are no
     outstanding or authorized options, warrants, purchase rights, subscription
     rights, conversion rights, exchange rights, or other contracts or
     commitments that could require any of CSC and its Subsidiaries to sell,
     transfer, or otherwise dispose of any capital stock of any of its
     Subsidiaries or that could require any Subsidiary of CSC to issue, sell, or
     otherwise cause to become outstanding any of its own capital stock. There
     are no outstanding stock appreciation, phantom stock, profit participation,
     or similar rights with respect to any Subsidiary of CSC. There are no
     voting trusts, proxies, or other agreements or understandings with respect
     to the voting of any capital stock of any Subsidiary of CSC. None of CSC
     and its Subsidiaries controls directly or indirectly or has any direct or
     indirect equity participation in any corporation, partnership, trust, or
     other business association which is not a Subsidiary of CSC.

7)   FINANCIAL STATEMENTS. Attached hereto as Exhibit III (7) are the following
     Financial Statements (collectively the "Financial Statements"):

     unaudited Consolidated and Consolidating Balance Sheets and Statements of
     Income, as of and for the month ended October 31, 2001 (the "Most Recent
     Financial Statements") for CSC and its Subsidiaries.

     The Most Recent Financial Statements have been prepared in accordance with
     GAAP on a consistent basis, presently fairly in all material respects the
     financial condition of CSC and its Subsidiaries for such periods, and are
     consistent with the books and records of CSC and its Subsidiaries;
     provided, however, that the Most Recent Financial Statements are subject to
     normal year-end adjustments (which will not be material individually or in
     the aggregate) and lack footnotes and other presentation items.

8)   EVENTS SUBSEQUENT TO October 31, 2001. Except as set forth in Section III
     (8) of the Disclosure Schedule, since October 31, 2001, there has not been
     any material adverse change in the business, financial condition,
     operations, results of operations, of any of CSC and its Subsidiaries.
     Without limiting the generality of the foregoing, since that date:

     a)  none of CSC and its Subsidiaries has sold, leased, transferred, or
         assigned any of its assets, tangible or intangible, other than for a
         fair consideration in the Ordinary Course of Business;

     b)  none of CSC and its Subsidiaries has entered into any agreement,
         contract, lease, or license (or series of related agreements,
         contracts, leases, and licenses) either involving more than $25,000 or
         outside the Ordinary Course of Business;

                                 Page 14 of 43
<PAGE>

     c)  no party (including any of CSC and its Subsidiaries) has accelerated,
         terminated, modified, or canceled any agreement, contract, lease, or
         license (or series of related agreements, contracts, leases, and
         licenses) involving more than $25,000 to which any of CSC and its
         Subsidiaries is a party or by which any of them is bound;

     d)  none of CSC and its Subsidiaries has imposed any Security Interest upon
         any of its assets, tangible or intangible;

     e)  none of CSC and its Subsidiaries has made any capital expenditure (or
         series of related capital expenditures) either involving more than
         $25,000 or outside the Ordinary Course of Business;

     f)  none of CSC and its Subsidiaries has made any capital investment in,
         any loan to, or any acquisition of the securities or assets of, any
         other Person (or series of related capital investments, loans, and
         acquisitions) either involving more than $25,000 or outside the
         Ordinary Course of Business;

     g)  none of CSC and its Subsidiaries has issued any note, bond, or other
         debt security or created, incurred, assumed, or guaranteed any
         indebtedness for borrowed money or capitalized lease obligation either
         involving more than $10,000;

     h)  none of CSC and its Subsidiaries has delayed or postponed the payment
         of accounts payable and other Liabilities outside the Ordinary Course
         of Business;

     i)  none of CSC and its Subsidiaries has canceled, compromised, waived, or
         released any right or claim (or series of related rights and claims)
         either involving more than $5,000 or outside the Ordinary Course of
         Business;

     j)  none of CSC and its Subsidiaries has granted any license or sublicense
         of any rights under or with respect to any Intellectual Property other
         than any license disclosed in Section III (8) (j) of the Disclosure
         Schedule;

     k)  there has been no change made or authorized in the charter or bylaws of
         any of CSC and its Subsidiaries;

     l)  none of CSC and its Subsidiaries has issued, sold, or otherwise
         disposed of any of its capital stock, or granted any options, warrants,
         or other rights to purchase or obtain (including upon conversion,
         exchange, or exercise) any of its capital stock other than grants of
         stock options disclosed in Section III (8) (l) of the Disclosure
         Schedule;

     m)  none of CSC and its Subsidiaries has declared, set aside, or paid any
         dividend or made any distribution with respect to its capital stock
         (whether in cash or in kind) or redeemed, purchased, or otherwise
         acquired any of its capital stock;

     n)  none of CSC and its Subsidiaries has experienced any damage,
         destruction, or loss (whether or not covered by insurance) to its
         property;

     o)  none of CSC and its Subsidiaries has made any loan to, or entered into
         any other transaction with, any of its directors, officers, and
         employees outside the Ordinary Course of Business;

                                 Page 15 of 43
<PAGE>

     p)  none of CSC and its Subsidiaries has entered into any employment
         contract or collective bargaining agreement, written or oral, or
         modified the terms of any existing such contract or agreement;

     q)  none of CSC and its Subsidiaries has granted any increase in the base
         compensation of any of its directors, officers, and employees outside
         the Ordinary Course of Business;

     r)  none of CSC and its Subsidiaries has adopted, amended, modified, or
         terminated any bonus, profit-sharing, incentive, severance, or other
         plan, contract, or commitment for the benefit of any of its directors,
         officers, and employees (or taken any such action with respect to any
         other Employee Benefit Plan);

     s)  none of CSC and its Subsidiaries has made any other change in
         employment terms for any of its directors, officers, and employees
         outside the Ordinary Course of Business;

     t)  none of CSC and its Subsidiaries has made or pledged to make any
         charitable or other capital contribution outside the Ordinary Course of
         Business;

     u)  there has not been any other material occurrence, event, incident,
         action, or transaction outside the Ordinary Course of Business
         involving any of CSC and its Subsidiaries; and

     v)  none of CSC and its Subsidiaries has committed to any of the foregoing.

9)   UNDISCLOSED LIABILITIES. None of CSC and its Subsidiaries has any Liability
     (and, to the knowledge of CSC, there is no Basis for any present or future
     action, suit, proceeding, hearing, investigation, charge, complaint, claim,
     or demand against any of them giving rise to any Liability), except for:

     a)  Liabilities set forth on the face of the Most Recent Balance Sheet
         (rather than in any notes thereto); and

     b)  Liabilities which have arisen after the date of the Most Recent Balance
         Sheet in the Ordinary Course of Business (none of which results from,
         arises out of, relates to, is in the nature of, or was caused by any
         breach of contract, breach of warranty, tort, infringement, or
         violation of law).

10)  LEGAL COMPLIANCE. Each of CSC and its Subsidiaries has complied with all
     applicable laws (including rules, regulations, codes, plans, injunctions,
     judgments, orders, decrees, rulings, and charges thereunder) of federal,
     state, local, and foreign governments (and all agencies thereof), and no
     action, suit, proceeding, hearing, investigation, charge, complaint, claim,
     demand, or notice has been filed or commenced against any of them alleging
     any failure so to comply.

11)  LICENSES TO DO BUSINESS, Except as provided in Section III (11) of the
     Disclosure Schedule, each of CSC and its Subsidiaries holds all licenses,
     permits, authorities and other regulatory approvals necessary to do
     business and conduct its affairs without interruption and no action, suit,
     proceeding, hearing, investigation, charge, complaint, claim, demand, or
     notice has been filed or commenced against any of them alleging any failure
     so to comply with any license, permit or other authority.

                                 Page 16 of 43
<PAGE>

12)  TAX MATTERS.

     Except as provided in Section III (12) of the Disclosure Schedule:

     a)  Each of CSC and its Subsidiaries has filed all Tax Returns that it was
         required to file. All such Tax Returns were correct and complete in all
         respects. All Taxes owed by any of CSC and its Subsidiaries (whether or
         not shown on any Tax Return) have been paid. None of CSC and its
         Subsidiaries currently is the beneficiary of any extension of time
         within which to file any Tax Return. No claim has ever been made by an
         authority in a jurisdiction where any of CSC and its Subsidiaries does
         not file Tax Returns that it is or may be subject to taxation by that
         jurisdiction. There are no Security Interests on any of the assets of
         any of CSC and its Subsidiaries that arose in connection with any
         failure (or alleged failure) to pay any Tax.

     b)  Each of CSC and its Subsidiaries has withheld and paid all Taxes
         required to have been withheld and paid in connection with amounts paid
         or owing to any employee, independent contractor, creditor,
         stockholder, or other third party.

     c)  To the knowledge of CSC, no authority will assess any additional Taxes
         for any period for which Tax Returns have been filed. There is no
         dispute or claim concerning any Tax Liability of any of CSC and its
         Subsidiaries either:

         i)   claimed or raised by any authority in writing; or

         ii)  as to which CSC has Knowledge based upon personal contact with any
              agent of such authority.

         Since CSC has not yet completed a fiscal year, it has not been required
         to file any federal, state, local or foreign income Tax Returns.

     d)  None of CSC and its Subsidiaries has waived any statute of limitations
         in respect of Taxes or agreed to any extension of time with respect to
         a Tax assessment or deficiency.

     e)  None of CSC and its Subsidiaries has filed a consent under Code Section
         341(f) concerning collapsible corporations. None of CSC and its
         Subsidiaries has made any payments, is obligated to make any payments,
         or is a party to any agreement that under certain circumstances could
         obligate it to make any payments that will not be deductible under Code
         Section 280G. None of CSC and its Subsidiaries has been a United States
         real property holding corporation within the meaning of Code Section
         897(c)(2) during the applicable period specified in Code Section
         897(c)(1)(A)(ii). None of CSC and its Subsidiaries is a party to any
         Tax allocation or sharing agreement. None of CSC and its Subsidiaries

         i)   has been a member of an Affiliated Group filing a consolidated
              federal income Tax Return (other than a group the common parent of
              which was CSC): or

                                 Page 17 of 43
<PAGE>

         ii)  has any Liability for the Taxes of any Person (other than any of
              CSC and its Subsidiaries) under Reg. Section 1.1502-6 (or any
              similar provision of state, local, or foreign law), as a
              transferee or successor, by contract, or otherwise.

     f)  The unpaid Taxes of CSC and its Subsidiaries did not, as of October 31,
         2001, exceed the reserve for Tax Liability (rather than any reserve for
         deferred Taxes established to reflect timing differences between book
         and Tax income) set forth on the face of the Most Recent Balance Sheet
         (rather than in any notes thereto). CSC and its Subsidiaries have not
         incurred any Liability for Taxes since October 31, 2001 other than
         Taxes incurred in the Ordinary Course of Business.

13)  REAL PROPERTY.

     a)  Neither CSC nor any of its Subsidiaries owns any real property.

     b)  Section III (13) (b) of the Disclosure Schedule lists and describes
         briefly all real property leased or subleased to any of CSC and its
         Subsidiaries. CSC has delivered to Vianet correct and complete copies
         of the leases and subleases listed in Section III (13) (b) of the
         Disclosure Schedule (as amended to date). With respect to each lease
         and sublease listed in Section III (13) (b) of the Disclosure Schedule:

         i)   the lease or sublease is legal, valid, binding, enforceable, and
              in full force and effect, except as limited by bankruptcy and
              insolvency laws and other laws affecting creditors rights
              generally, and general principles of equity;

         ii)  no consent, authorization or other approval is required under the
              lease or sublease in connection with the consummation of the
              transactions contemplated hereby and such lease or sublease will
              continue to be legal, valid, binding, enforceable, and in full
              force and effect on identical terms following the consummation of
              the transactions contemplated hereby, except as limited by
              bankruptcy and insolvency laws and other laws affecting creditors
              rights generally and general principles of equity;

         iii) neither CSC, nor any of its Subsidiaries nor, to the Knowledge of
              CSC, any other person, is in breach or default thereunder, and, to
              the Knowledge of CSC, no event has occurred which, with notice or
              lapse of time, would constitute a breach or default or permit
              termination, modification, or acceleration thereunder;

         iv)  neither CSC nor any of its Subsidiaries nor, to the Knowledge of
              CSC, any other person, has repudiated any provision thereof;

         v)   there are no disputes, oral agreements, or forbearance programs in
              effect as to the lease or sublease;

         vi)  none of CSC and its Subsidiaries has assigned, transferred,
              conveyed, mortgaged, deeded in trust, or encumbered any interest
              in the leasehold or sub-leasehold;

         vii) all facilities leased or subleased thereunder have received all
              approvals of governmental authorities (including licenses and
              permits) required of CSC and its Subsidiaries in connection with
              the operation thereof by CSC and its Subsidiaries and have been
              operated and maintained by CSC and its Subsidiaries in accordance
              with applicable laws, rules, and regulations; and

                                 Page 18 of 43
<PAGE>

         viii) all facilities leased or subleased thereunder are supplied with
              utilities and other services reasonably necessary for the
              operation of said facilities.

14)  INTELLECTUAL PROPERTY.

     a)  CSC and its Subsidiaries own or have the right to use pursuant to
         license, sublicense, agreement, or permission all Intellectual Property
         necessary for the operation of the businesses of CSC and its
         Subsidiaries as presently conducted. Each item of Intellectual Property
         owned or used by any of CSC and its Subsidiaries immediately prior to
         the Closing hereunder will be owned or available for use by CSC or the
         Subsidiary on identical terms and conditions immediately subsequent to
         the Closing hereunder. Except as provided in Section III (14) (a) of
         the Disclosure Schedule, each of CSC and its Subsidiaries has taken all
         action reasonably necessary to maintain and protect each item of
         Intellectual Property that it owns or uses.

     b)  To the knowledge of CSC, none of CSC and its Subsidiaries has
         interfered with, infringed upon, misappropriated, or otherwise come
         into conflict with any Intellectual Property rights of third parties.

     c)  Except as disclosed in Section III (14) (c) to the Disclosure Schedule,
         neither the directors and officers of CSC and its Subsidiaries or the
         employees of CSC and its Subsidiaries with responsibility for
         Intellectual Property matters has ever received any charge, complaint,
         claim, demand, or notice alleging any such interference, infringement,
         misappropriation, or violation (including any claim that any of CSC and
         its Subsidiaries must license or refrain from using any Intellectual
         Property rights of any third party).

     d)  Except as described in Section III (14) (d) to the Disclosure Schedule,
         to the Knowledge of CSC, no third party has interfered with, infringed
         upon, misappropriated, or otherwise come into conflict with any
         Intellectual Property rights of any of CSC and its Subsidiaries.

     e)  Section III (14) (e) of the Disclosure Schedule identifies each item of
         Intellectual Property, including, without limitation, each patent,
         patent application, trademark, trademark application or registration,
         copyright or copyright application or registration owned, held (whether
         pursuant to license or otherwise) or used by CSC and its Subsidiaries
         in conducting their business and identifies each license, agreement, or
         other permission which any of CSC and its Subsidiaries has granted to
         any third party with respect to any of its Intellectual Property
         (together with any exceptions). CSC has delivered to Vianet correct and
         complete copies of all such patents, registrations, applications,
         licenses, agreements, and permissions (as amended to date) and has made
         available to Vianet correct and complete copies of all other written
         documentation evidencing ownership and prosecution (if applicable) of
         each such item. Section III (14) (e) of the Disclosure Schedule also
         identifies each trade name or unregistered trademark used by any of CSC
         and its Subsidiaries in connection with any of its businesses. With
         respect to each item of Intellectual Property required to be identified
         in Section III (14) (e) of the Disclosure Schedule:

                                 Page 19 of 43
<PAGE>

         i)   CSC and its Subsidiaries possess all right, title, and interest in
              and to the item, free and clear of any Security Interest, license,
              assignment, shop rights, covenants by CSC nor to sue third
              parties, or other restriction except for the licenses disclosed in
              Section III (14) (e) (i) of the Disclosure Schedule;

         ii)  the item is not subject to any outstanding injunction, judgment,
              order, decree, ruling, or charge;

         iii) no action, suit, proceeding, hearing, investigation, charge,
              complaint, claim, or demand is pending or, to the Knowledge of of
              CSC is, or has been, threatened which challenges the legality,
              validity, enforceability, use, or ownership of the item;

         iv)  neither CSC nor any of its Subsidiaries has assigned any shop
              right, license, release, covenant not to sue or non-assertion
              assurance to any Person and, except as disclosed in Section III
              (14) (e) (iv) to the Disclosure Schedule, has never agreed to
              indemnify any Person for or against any interference,
              infringement, misappropriation, or other conflict with respect to
              the item; and

         v)   CSC has no Knowledge of any fact or information that would render
              any issuing patent based on the pending patent application item
              invalid and/or unenforceable and have no Knowledge of any past,
              present or threatened claim by any third party that any such
              issuing patent would be invalid and/or unenforceable.

     f)  Section III (14) (f) of the Disclosure Schedule identifies each item of
         Intellectual Property that any third party owns and that any of CSC and
         its Subsidiaries uses pursuant to license, sublicense, agreement, or
         permission. CSC has delivered to Vianet correct and complete copies of
         all such licenses, sublicenses, agreements, and permissions (as amended
         to date). With respect to each item of Intellectual Property required
         to be identified in Section III (14) of the Disclosure Schedule, to the
         Knowledge of CSC:

         i)   the license, sublicense, agreement, or permission covering the
              item is legal, valid, binding, enforceable, and in full force and
              effect, except as limited by bankruptcy and insolvency laws and
              other laws affecting creditors rights generally, and general
              principles of equity;

         ii)  no consent, authorization or other approval is required under the
              license or sublicense in connection with the consummation of the
              transactions contemplated hereby and such license, sublicense,
              agreement, or permission will continue to be legal, valid,
              binding, enforceable, and in full force and effect on identical
              terms following the consummation of the transactions contemplated
              hereby, except as limited by bankruptcy and insolvency laws and
              other laws affecting creditors rights generally, and general
              principles of equity;

                                 Page 20 of 43
<PAGE>

         iii) no party to the license, sublicense, agreement, or permission is
              in breach or default, and no event has occurred which with notice
              or lapse of time would constitute a breach or default or permit
              termination, modification, or acceleration thereunder;

         iv)  no party to the license, sublicense, agreement, or permission has
              repudiated any provision thereof;

         v)   with respect to each sublicense, the representations and
              warranties set forth in subsections (i) through (iv) above are
              true and correct with respect to the underlying license;

         vi)  the underlying item of Intellectual Property is not subject to any
              outstanding injunction, judgment, order, decree, ruling, or
              charge;

         vii) no action, suit, proceeding, hearing, investigation, charge,
              complaint, claim, or demand is pending or, is threatened which
              challenges the legality, validity, or enforceability of the
              underlying item of Intellectual Property; and

         viii) none of CSC and its Subsidiaries has granted any sublicense or
              similar right with respect to the license, sublicense, agreement,
              or permission.

     g)  To the Knowledge of CSC, none of CSC and its Subsidiaries will
         interfere with, infringe upon, misappropriate, or otherwise come into
         conflict with, any Intellectual Property rights of third parties as a
         result of the continued operation of its businesses as presently
         conducted.

     h)  CSC has no Knowledge of any new products, inventions, procedures, or
         methods of manufacturing or processing that any competitors or other
         third parties have developed which reasonably could be expected to
         supersede or make obsolete any product or process of any of CSC and its
         Subsidiaries.

15)  TANGIBLE ASSETS. CSC and its Subsidiaries own or lease all buildings,
     machinery, equipment, and other tangible assets reasonably necessary for
     the conduct of their businesses as presently conducted. Each such tangible
     asset has been maintained in accordance with normal industry practice, is
     in operating condition and repair (subject to normal wear and tear), and is
     suitable for the purposes for which it presently is used.

16)  INVENTORY. CSC and its Subsidiaries have no physical inventory.

17)  CONTRACTS. Section III (17) of the Disclosure Schedule lists the following
     contracts and other agreements to which any of CSC and its Subsidiaries is
     a party:

     a)  any agreement (or group of related agreements) for the lease of
         personal property to or from any Person providing for lease payments in
         excess of $10,000 per annum;

     b)  any agreement (or group of related agreements) for the purchase or sale
         of raw materials, commodities, supplies, products, or other personal
         property, or for the furnishing or receipt of services, the performance
         of which will extend over a period of more than one year, result in a
         material loss to any of CSC and its Subsidiaries, or involve
         consideration in excess of $10,000;

                                 Page 21 of 43
<PAGE>

     c)  any agreement concerning a partnership or joint venture;

     d)  any agreement (or group of related agreements) under which it has
         created, incurred, assumed, or guaranteed any indebtedness for borrowed
         money, or any capitalized lease obligation, in excess of $10,000 or
         under which it has imposed a Security Interest on any of its assets,
         tangible or intangible;

     e)  any agreement concerning confidentiality or non-competition;

     f)  any agreement with any of the Stockholders of CSC or their Affiliates;

     g)  any profit sharing, stock option, stock purchase, stock appreciation,
         deferred compensation, severance, or other material plan or arrangement
         for the benefit of its current or former directors, officers, and
         employees;

     h)  any collective bargaining agreement;

     i)  any agreement for the employment of any individual on a full-time,
         part-time, consulting, or other basis or providing severance benefits;

     j)  any agreement under which it has advanced or loaned any amount to any
         of its directors, officers, and employees;

     k)  any agreement not covered by clauses (i) through (x) under which the
         consequences of a default or termination reasonably would be expected
         to have a Material Adverse Effect; or

     l)  any other agreement (or group of related agreements) the performance of
         which involves consideration in excess of $10,000. CSC has delivered to
         Vianet a correct and complete copy of each written agreement listed in
         Section III (17) of the Disclosure Schedule (as amended to date) and a
         written summary setting forth the material terms and conditions of each
         oral agreement referred to in Section III (17) of the Disclosure
         Schedule. Except as set forth on Section III (17) of the Disclosure
         Schedule, with respect to each such agreement:

         i)   the agreement is legal, valid, binding, enforceable, and in full
              force and effect except as limited by bankruptcy and insolvency
              laws and other laws affecting creditors rights generally and
              general principles of equity;

         ii)  no consent, authorization or other approval is required under the
              agreement in connection with the consummation of the transactions
              contemplated hereby and such agreement will continue to be legal,
              valid, binding, enforceable, and in full force and effect on
              identical terms following the consummation of the transactions
              contemplated hereby except as limited by bankruptcy and insolvency
              laws and other laws affecting creditors rights generally and
              general principles of equity;

         iii) CSC is not in breach or default and, to the Knowledge of CSC, no
              other party is in breach or default,

                                 Page 22 of 43
<PAGE>

         iv)  to the Knowledge of CSC, no event has occurred which with notice
              or lapse of time would constitute a breach or default, or permit
              termination, modification, or acceleration, under the agreement;
              and

         v)   CSC has not, and, to the Knowledge of CSC, no other party has,
              repudiated any provision of the agreement.

18)  NOTES AND ACCOUNTS RECEIVABLE. All notes and accounts receivable of CSC and
     its Subsidiaries have arisen from bona fide transactions in the Ordinary
     Course of Business and are reflected properly on their books and records.
     All such notes and accounts receivable reflected on the Most Recent Balance
     Sheet are valid receivables subject to no set offs or counterclaims.

19)  POWERS OF ATTORNEY. There are no outstanding powers of attorney executed on
     behalf of any of CSC and its Subsidiaries.

20)  INSURANCE. Section III (20) of the Disclosure Schedule sets forth the
     following information with respect to each insurance policy (including
     policies providing property, casualty, liability, and workers' compensation
     coverage and bond and surety arrangements, if any) to which any of CSC and
     its Subsidiaries has been a party, a named insured, or otherwise the
     beneficiary of coverage at any time within the past year:

     a)  the name, address, and telephone number of the agent;

     b)  the name of the insurer, the name of the policyholder, and the name of
         each covered insured;

     c)  the policy number and the period of coverage;

     d)  the scope (including an indication of whether the coverage was on a
         claims made, occurrence, or other basis) and amount (including a
         description of how deductibles and ceilings are calculated and operate)
         of coverage; and

     e)  a description of any retroactive premium adjustments or other
         loss-sharing arrangements.

With respect to each such insurance policy:

     f)  the policy is legal, valid, binding, enforceable, and in full force and
         effect, except as limited by bankruptcy and insolvency laws and other
         laws affecting creditors rights generally and general principles of
         equity;

     g)  the policy will continue to be legal, valid, binding, enforceable, and
         in full force and effect on identical terms following the consummation
         of the transactions contemplated hereby, except s limited by bankruptcy
         and insolvency laws and other laws affecting creditors rights generally
         and general principles of equity;

     h)  neither any of CSC and its Subsidiaries nor, to the Knowledge of CSC,
         any other person is in breach or default (including with respect to the
         payment of premiums or the giving of notices), and to the Knowledge of
         CSC, no event has occurred which, with notice or the lapse of time,
         would constitute such a breach or default, or permit termination,
         modification, or acceleration, under the policy; and

                                 Page 23 of 43
<PAGE>

     i)  neither CSC nor any of its subsidiaries, nor, to the Knowledge of the
         Principal Stockholders, any other person has repudiated any provision
         thereof. Each of CSC and its Subsidiaries has been covered during the
         current year by insurance in scope and amount customary and reasonable
         for the businesses in which it has engaged during the aforementioned
         period. Section III (20) (i) of the Disclosure Schedule describes any
         self-insurance arrangements affecting any of CSC and its Subsidiaries.

21)  LITIGATION. Section III (21) of the Disclosure Schedule sets forth each
     instance in which any of CSC and its Subsidiaries:

     a)  is, or, with respect to Litigation, during the past ten years was,
         subject to any outstanding injunction, judgment, order, decree, ruling,
         or charge or

     b)  is or, with respect to Litigation, during the past ten years was, a
         party or, to the Knowledge of any of the Principal Stockholders, is, or
         with respect to Intellectual Property during the past ten years was,
         threatened in writing to be made a party to any action, suit,
         proceeding, hearing, or investigation of, in, or before any court or
         quasi-judicial or administrative agency of any federal, state, local,
         or foreign jurisdiction or before any arbitrator.

         None of the actions, suits, proceedings, hearings, and investigations
         set forth in Section III (21) of the Disclosure Schedule could, if
         determined adversely to CSC, have a Material Adverse Effect. None of
         the Principal Stockholders has any reason to believe that any such
         action, suit, proceeding, hearing, or investigation may be brought or
         threatened against any of CSC and its Subsidiaries.

22)  PRODUCT WARRANTY. The services provided by any of CSC and its Subsidiaries:

     a)  have been in conformity in all material respects, with all applicable
         contractual commitments; and

     b)  do not expose CSC and its Subsidiaries to any consequential Liability
         for any failure to provide services.

23)  PRODUCT LIABILITY. To the knowledge of the Principal Stockholders, none of
     CSC and its Subsidiaries has any Liability (and there is no Basis for any
     present or future action, suit, proceeding, hearing, investigation, charge,
     complaint, claim, or demand against any of them giving rise to any
     Liability) arising out of any injury to individuals or property as a result
     of the use of any service provided by any of CSC and its Subsidiaries.

24)  EMPLOYEES. To the Knowledge of any of the Principal Stockholders, no
     executive, key employee, or group of key employees has any plans to
     terminate employment with any of CSC and its Subsidiaries. None of CSC and
     its Subsidiaries is a party to or bound by any collective bargaining
     agreement, nor has any of them experienced any strikes, grievances, claims
     of unfair labor practices, or other collective bargaining disputes. None of
     CSC and its Subsidiaries has committed any unfair labor practice. CSC has
     no Knowledge of any organizational effort presently being made or
     threatened by or on behalf of any labor union with respect to employees of
     any of CSC and its Subsidiaries.

                                 Page 24 of 43
<PAGE>

25)  EMPLOYEE BENEFITS.

     a)  Section III (25) of the Disclosure Schedule lists each Employee Benefit
         Plan that any of CSC and its Subsidiaries maintains or to which any of
         CSC and its Subsidiaries contributes or has any obligation to
         contribute.

     b)  Each such Employee Benefit Plan (and each related trust, insurance
         contract, or fund) complies in form and in operation in all material
         respects with the applicable requirements of ERISA, the Code, and other
         applicable laws.

     c)  All required reports and descriptions (including Form 5500 Annual
         Reports, summary annual reports, PBGC-1's, and summary plan
         descriptions) have been timely filed and distributed appropriately with
         respect to each such Employee Benefit Plan. When applicable, the
         requirements of COBRA have been met with respect to each such Employee
         Benefit Plan which is an Employee Welfare Benefit Plan.

     d)  All premiums and other payments for all periods ending on or before the
         Closing Date have been paid with respect to each Employee Benefit Plan
         which is an Employee Welfare Benefit Plan.

     e)  All contributions (including all employer contributions and employee
         salary reduction contributions) which are due have been timely paid to
         each such Employee Benefit Plan which is an Employee Pension Benefit
         Plan and all contributions for any period ending on or before the
         Closing Date which are not yet due have been paid to each such Employee
         Pension Benefit Plan or accrued in accordance with the past custom and
         practice of CSC and its Subsidiaries. Each such Employee Benefit Plan
         which is an Employee Pension Benefit Plan meets the requirements of a
         "Simplified Employee Pension" under Section 408(k) of the Code,
         including Section 408(k)(6) of the Code, and CSC is not aware of any
         facts or circumstances that could result in the failure of such
         Employee Pension Benefit Plan to satisfy the requirements of Section
         408(k) of the Code, including Section 408(k)(6) of the Code. Neither
         CSC nor any of its Subsidiaries maintains any Employee Pension Benefit
         Plan that is a "qualified plan" under Section 401 (a) of the Code.

     f)  CSC has delivered to Vianet correct and complete copies of the plan
         documents and summary plan descriptions, the most recent determination
         letter received from the Internal Revenue Service, the most recent Form
         5500 Annual Report, and all related trust agreements, insurance
         contracts, and other funding agreements which implement each such
         Employee Benefit Plan.

     g)  With respect to each Employee Benefit Plan that any of CSC, its
         Subsidiaries, and any ERISA Affiliate maintains or ever has maintained
         or to which any of them contributes, ever has contributed, or ever has
         been required to contribute, there have been no Prohibited Transactions
         with respect to any such Employee Benefit Plan. No Fiduciary has any
         Liability for breach of fiduciary duty or any other failure to act or
         comply in connection with the administration or investment of the
         assets of any such Employee Benefit Plan. No action, suit, proceeding,
         hearing, or investigation with respect to the administration or the
         investment of the assets of any such Employee Benefit Plan (other than
         routine claims for benefits) is pending or, to the Knowledge of any of
         the Principal Stockholders, threatened. CSC has no Knowledge of any
         Basis for any such action, suit, proceeding, hearing, or investigation.

                                 Page 25 of 43
<PAGE>

     h)  None of CSC, its Subsidiaries, and the other members of the Controlled
         Group that includes CSC and its Subsidiaries contributes to, ever has
         contributed to, or ever has been required to contribute to any Multi
         employer Plan or has any Liability (including withdrawal liability as
         defined in ERISA Section 4201) under any Multi employer Plan.

     i)  None of CSC and its Subsidiaries maintains or ever has maintained or
         contributes, ever has contributed, or ever has been required to
         contribute to any Employee Welfare Benefit Plan providing medical,
         health, or life insurance or other welfare-type benefits for current or
         future retired or terminated employees, their spouses, or their
         dependents (other than in accordance with COBRA).

26)  GUARANTIES. None of CSC and its Subsidiaries is a guarantor or otherwise is
     liable for any Liability or obligation (including indebtedness) of any
     other Person other than CSC or any such Subsidiary.

27)  ENVIRONMENTAL, HEALTH, AND SAFETY MATTERS. To the Knowledge of the
     Principal Stockholders,

     a)  Each of CSC and its Subsidiaries, has complied and is in compliance
         with all Environmental, Health, and Safety Requirements.

     b)  Without limiting the generality of the foregoing, each of CSC, its
         Subsidiaries and their respective Affiliates has obtained and complied
         with, and is in compliance with, all permits, licenses and other
         authorizations that are required pursuant to Environmental, Health, and
         Safety Requirements for the occupation of its facilities and the
         operation of its business.

     c)  Neither CSC, nor its Subsidiaries, has received any written or oral
         notice, report or other demand from a third party regarding any actual
         or alleged violation of Environmental, Health, and Safety Requirements,
         or any Liabilities, including any investigatory, remedial or corrective
         obligations, relating to any of them or its facilities arising under
         Environmental, Health, and Safety Requirements.

     d)  None of the following exists at any property or facility leased by CSC
         or its Subsidiaries:

         i)   underground storage tanks;

         ii)  asbestos-containing material in any form or condition;

         iii) materials or equipment containing polychlorinated biphenyls; or

         iv)  landfills, surface impoundments, or disposal areas.

                                 Page 26 of 43
<PAGE>

     e)  Neither this Agreement nor the consummation of the transaction that is
         the subject of this Agreement will result in any obligations for site
         investigation or cleanup, or notification to or consent of government
         agencies or third parties, pursuant to any of the so-called
         "transaction-triggered" or "responsible property transfer"
         Environmental, Health, and Safety Requirements.

     f)  Neither CSC, nor its Subsidiaries, has, either expressly or by
         operation of law, assumed or undertaken any Liability, including
         without limitation any obligation for corrective or remedial action, of
         any other Person relating to Environmental, Health, and Safety
         Requirements.

28)  CERTAIN BUSINESS RELATIONSHIPS WITH CSC AND ITS SUBSIDIARIES. Except as set
     forth on Section III (28) of the Disclosure Schedule, none of the
     Stockholders of CSC or their Affiliates has been involved in any business
     arrangement or relationship with any of CSC and its Subsidiaries within the
     past 12 months, and none of the Stockholders of CSC or their Affiliates
     owns any asset, tangible or intangible, which is used in the business of
     any of CSC and its Subsidiaries.

29)  DISCLOSURE. The representations and warranties contained in this Section
     III do not contain any untrue statement of a material fact or omit to state
     any material fact necessary in order to make the statements and information
     contained in this Section III not misleading.

IV.  REPRESENTATIONS AND WARRANTIES OF VIANET AND CAC.

Each of Vianet and CAC represents and warrants to CSC that the statements
contained in this Section IV are correct and complete as of the date of this
Agreement and will be correct and complete as of the Closing Date (as though
made then and as though the Closing Date were substituted for the date of this
Agreement throughout this Section IV).

1)   ORGANIZATION. Each of Vianet and CAC is a corporation duly organized,
     validly existing, and in good standing under the laws of the jurisdiction
     of its incorporation.

2)   AUTHORIZATION OF TRANSACTION. Each of Vianet and CAC has full power and
     authority (including full corporate power and authority) to execute and
     deliver this Agreement and, at Closing, the Registration Rights Agreement,
     and to perform its obligations hereunder and thereunder. This Agreement and
     the Registration Rights Agreement (when executed and delivered) each
     constitutes the valid and legally binding obligation of each of Vianet and
     CAC, enforceable in accordance with its terms and conditions.

3)   NON-CONTRAVENTION. Neither the execution and the delivery of this agreement
     or the Registration Rights Agreement, nor the consummation of the
     transactions contemplated hereby or thereby, will (i) violate any
     constitution, statute, regulation, rule, injunction, judgment, order,
     decree, ruling, charge, or other restriction of any government,
     governmental agency, or court to which either Vianet or CAC is subject or
     any provision of the charter or bylaws of either Vianet or CAC, or (ii)
     conflict with, result in a breach of, constitute a default under, result in
     the acceleration of, create in any party the right to accelerate,
     terminate, modify, or cancel, or require any notice under any agreement,
     contract, lease, license, instrument, or other arrangement to which either
     Vianet or CAC is a party or by which it is bound or to which any of its
     assets is subject. Other than in connection with the provisions of the
     Delaware General Corporation Law, neither Vianet nor CAC needs to give any
     notice to, make any filing with, or obtain any authorization, consent, or
     approval of any government or governmental agency in order for the Parties
     to consummate the transactions contemplated by this Agreement.

                                 Page 27 of 43
<PAGE>

4)   BROKERS' FEES. Except for the fee payable to Alliance Capital pursuant to
     the agreement dated May 11th 2001, as amended on September 26th 2001 and
     December 10th 2001, by and between Vianet and Alliance Capital, neither
     Vianet nor CAC has any liability or obligation to pay any fees or
     commissions to any broker, finder, or agent with respect to the
     transactions contemplated by this Agreement for which any of CSC or its
     Subsidiaries could become liable or obligated.

V.   REPRESENTATIONS AND WARRANTIES CONCERNING VIANET.

Vianet represents and warrants to CSC that the statements contained in this
Section V are correct and complete as of the date of this Agreement and will be
correct and complete as of the Closing Date (as though made then and as though
the Closing Date were substituted for the date of this Agreement throughout this
Section V).

1)   VIANET DISCLOSURES. Vianet currently files reports pursuant to the
     requirement of Section 12(g) of the Securities Exchange Act. Except for the
     filings disclosed on Schedule V (1) to this Agreement, Vianet has filed all
     annual, quarterly, current and other reports that are applicable to it
     under the Securities Exchange Act. Vianet has delivered to CSC (a) its
     annual report to stockholders and its Annual Report on Form 10-KSB for its
     last fiscal year and (b) all of its Quarterly Reports on Form 10-QSB and
     each other report, (collectively the "SEC Reports"). The SEC Reports do not
     contain any untrue statement of a material fact or omit to state a material
     fact required to be stated therein or necessary to make the statements
     therein, in the light of the circumstances under which they were made, not
     misleading. The audited and unaudited financial statements of Vianet
     included in the SEC Reports (the "Financial Statements") have been prepared
     in accordance with generally accepted accounting principles applied on a
     consistent basis (except as stated in such Financial Statements or the
     notes thereto) and fairly present the financial position of Vianet and its
     consolidated subsidiaries as of the dates thereof and the results of their
     operations and changes in financial position for the periods then ended.
     Except as disclosed by Vianet in the SEC Reports, since the end of the most
     recent of such fiscal years, there has been no material adverse change in
     the business, properties, financial condition or results of operations of
     Vianet and its subsidiaries taken together, and there is no existing
     condition, event or series of events which reasonably would be expected to
     have a material adverse effect on the business, properties, financial
     condition or results of operations of Vianet and its subsidiaries taken
     together, or the ability of Vianet to perform its obligations under this
     Agreement or the Registration Rights Agreement. The offer, sale and
     issuance of the Vianet Shares in connection with the Merger as contemplated
     by this Agreement are exempt from the registration requirements of the
     Securities Act, and neither Vianet nor any authorized agent acting on its
     behalf will take any action hereafter that would cause the loss of such
     exemption.

                                 Page 28 of 43
<PAGE>

2)   NO MATERIAL ADVERSE CHANGE. There has not been, since September 30, 2001,
     any material adverse change in the assets, properties, business, operations
     or financial position of Vianet.

3)   VIANET SHARES. The Vianet Shares to be issued to the CSC Stockholders in
     connection with the Merger:

     a)  will have been duly authorized; and

     b)  upon issuance, delivery and payment therefore in the manner described
         herein, will be validly issued, fully paid and non-assessable.

VI.  COVENANTS.

The Parties agree as follows with respect to the period from and after the
execution of this Agreement:

1)   GENERAL. Each of the Parties will use its best efforts to take all action
     and to do all things necessary in order to consummate and make effective
     the transactions contemplated by this Agreement (including satisfaction,
     but not waiver, of the closing conditions set forth in Section VII below).

2)   NOTICES AND CONSENTS. Vianet and CSC will give any notices (and will cause
     each of their Subsidiaries to give any notices) to third parties, and will
     use commercially reasonable efforts to obtain (and will cause each of their
     Subsidiaries to use commercially reasonable efforts to obtain) any consents
     or authorizations of any government or government agency or any other
     Person required to be obtained by Vianet and CSC or any of their
     Subsidiaries to consummate the transaction contemplated hereby.

3)   CONSENT OF CSC STOCKHOLDERS. Subject to Vianet's reasonable cooperation in
     the preparation thereof, CSC will, within three (3) business days after
     execution and delivery this Agreement, disseminate to the CSC Stockholders
     a Confidential Solicitation of Consents and Information Statement Regarding
     the Merger prepared by the management of CSC (the "Information Statement")
     which shall be in form and substance reasonably acceptable to CSC and
     Vianet. The Principal Stockholders shall exercise commercially reasonable
     efforts to obtain the Requisite CSC Stockholder Approval no later than ten
     (10) days after dissemination of the Information Statement. The Information
     Statement will contain the affirmative recommendation of the board of
     directors of CSC in favor of the adoption of this Agreement and the
     approval of the Merger. Each of the Principal Stockholders covenants and
     agrees to consent to and approve the Merger.

                                 Page 29 of 43
<PAGE>

4)   OPERATION OF BUSINESS. Vianet and CSC will continue to conduct their
     businesses in the Ordinary Course of Business and will not (and will not
     cause or permit any of its Subsidiaries to) without the prior written
     consent of the other, engage in any practice, take any action, or enter
     into any transaction outside the Ordinary Course of Business. Without
     limiting the generality of the foregoing, without the prior written consent
     of the other, each of Vianet and CSC and their Subsidiaries will not:

     a)  authorize or effect any change in its charter or bylaws;

     b)  grant any options, warrants, or other rights to purchase or obtain any
         of its capital stock or issue, sell, or otherwise dispose of any of its
         capital stock (except upon the conversion or exercise of options,
         warrants, and other rights currently outstanding);

     c)  declare, set aside, or pay any dividend or distribution with respect to
         its capital stock (whether in cash or in kind), or redeem, repurchase,
         or otherwise acquire any of its capital stock;

     d)  issue any note, bond, or other debt security or create, incur, assume,
         or guarantee any indebtedness for borrowed money or capitalized lease
         obligation;

     e)  impose any Security Interest upon any of its assets;

     f)  make any capital investment in, make any loan to, or acquire the
         securities or assets of any other Person;

     g)  make any change in employment terms for any of its directors, officers,
         and employees; and

     h)  commit to any of the foregoing.

5)   FULL ACCESS. Each Party will (and will cause each of its Subsidiaries to)
     permit representatives of the other to have full access at all reasonable
     times, and in a manner so as not to interfere with normal business
     operations, to all premises, properties, personnel, books, records
     (including tax records), contracts, and documents of or pertaining to each
     of the Parties and their Subsidiaries. Each Party will treat and hold any
     Confidential Information it receives from the other and any of its
     Subsidiaries in the course of the reviews contemplated by this Section VI
     as confidential and will not disclose the Confidential Information to any
     other person, will not use any of the Confidential Information except in
     connection with this Agreement, and, if this Agreement is terminated for
     any reason whatsoever, agrees to return to the other Party all tangible
     embodiments (and all copies) thereof which are in its possession.

6)   NOTICE OF DEVELOPMENTS. Each Party will give prompt written notice to the
     other of any material adverse development causing a breach of any of its
     own representations and warranties in Section III, IV or V above. No
     disclosure by any Party pursuant to this Section VI, however, shall be
     deemed to amend or supplement the Disclosure Schedule or to prevent or cure
     any misrepresentation, breach of warranty, or breach of covenant.

                                 Page 30 of 43
<PAGE>

7)   EXCLUSIVITY. Each of the Parties and their Principal Shareholders will not
     (and will not cause or permit any of its Subsidiaries to) solicit,
     initiate, or encourage the submission of any proposal or offer from any
     Person relating to the acquisition of all or substantially all of the
     capital stock or assets of any of Vianet, CSC and their Subsidiaries
     (including any acquisition structured as a merger, consolidation, or share
     exchange). Each of the Parties shall notify the other immediately if any
     Person makes any proposal, offer, inquiry, or contact with respect to any
     of the foregoing.

8)   BOARD REPRESENTATION. Within sixteen days following the Closing, the
     directors of Vianet shall appoint a sufficient number of representatives of
     the CSC Stockholders to the Vianet Board of Directors so that the
     representatives of the CSC Stockholders constitute a majority of the
     members of the Vianet Board of Directors.

9)   INFORMATION STATEMENT. After execution of this Agreement, Vianet will
     assist, as reasonably requested by CSC, in preparing the Information
     Statement, including providing to CSC all information reasonably requested
     by CSC regarding Vianet that is reasonably necessary to complete the
     Information Statement. The information provided by Vianet regarding Vianet
     including, without limitation, any information filed by Vianet with the SEC
     under the Securities Exchange Act incorporated by reference will not
     contain any untrue statement of material fact or omit to state any material
     fact necessary to make the statements therein not misleading.

10)  PATENT APPLICATIONS. The Principal Stockholders agree to execute and
     deliver all applications for patent, including all divisional,
     continuation, reissue and other applications for patent on the invention(s)
     set forth in the pending applications listed in Section VI (10) of the
     Disclosure Schedule and all assignments thereof to Vianet, the Surviving
     Corporation or its assigns, to communicate to Vianet or its representatives
     all facts known to CSC respecting said invention(s), whenever requested, to
     testify in any interferences or other legal proceedings in which any of
     said applications or patents resulting there from may become involved, to
     sign all lawful papers, make all rightful oaths, and to do generally
     everything reasonably necessary to assist Vianet, its successors, assigns
     and nominees to obtain patent protection for said invention(s) in the
     United States and all other countries, all at the cost and expense of
     Vianet.

11)  TRANSFERS BY SURVIVING CORPORATION. After the Effective Time, Vianet shall
     not cause or permit the Surviving Corporation to transfer any of its
     properties or assets outside of the ordinary course of business other than
     transfers to subsidiary corporations wholly-owned by the Surviving
     Corporation or the merger of the Surviving Corporation into Vianet in a
     merger qualifying under Section 368(a) of the Code.

12)  TAX INFORMATION. As promptly as reasonably practicable after the Closing,
     the Principal Stockholders will provide to Vianet the following information
     with respect to each of CSC and its Subsidiaries (or, in the case of clause
     (b) below, with respect to each of the Subsidiaries) as of the Closing
     Date:

     a)  the basis of CSC or Subsidiary in its assets;

                                 Page 31 of 43
<PAGE>

     b)  the basis of the stockholder(s) of the Subsidiary in its stock (or the
         amount of any Excess Loss Account);

     c)  the amount of any net operating loss, net capital loss, unused
         investment or other credit, unused foreign tax, or excess charitable
         contribution allocable to CSC or Subsidiary; and

     d)  the amount of any deferred gain or loss allocable to CSC or Subsidiary
         arising out of any deferred inter-company transaction.

VII.     CONDITIONS TO OBLIGATION TO CLOSE.

1)   CONDITIONS TO OBLIGATION OF VIANET AND CAC. The obligation of each of
     Vianet and CAC to consummate the transactions to be performed by it in
     connection with the Closing is subject to satisfaction of the following
     conditions:

     a)  this Agreement and the Merger shall have received the Requisite CSC
         Stockholder Approval and CSC shall have delivered to Vianet copies of
         the Board of Directors and CSC Stockholders resolutions approving this
         Agreement and the Merger, certified by the Secretary of CSC, and good
         standing certificates for CSC and the Subsidiaries dated not more than
         ten (10) days prior to the Closing;

     b)  CSC and its Subsidiaries shall each have procured all consents of any
         government agency or other Person required to be obtained by them to
         consummate the transactions contemplated by this Agreement including,
         without limitation, the consents required under Section VI;

     c)  the representations and warranties of CSC set forth in this Agreement
         above shall be true and correct in all material respects at and as of
         the Closing Date;

     d)  CSC shall have performed and complied with all of its covenants
         hereunder in all material respects through the Closing;

     e)  no action, suit, or proceeding shall be pending or threatened before
         any court or quasi-judicial or administrative agency of any federal,
         state, local, or foreign jurisdiction or before any arbitrator wherein
         an unfavorable injunction, judgment, order, decree, ruling, or charge
         would:

         i)   prevent consummation of any of the transactions contemplated by
              this Agreement;

         ii)  cause any of the transactions contemplated by this Agreement to be
              rescinded following consummation;

         iii) affect adversely the right of Vianet to own the capital stock of
              the Surviving Corporation and to control the Surviving Corporation
              and its Subsidiaries; or

                                 Page 32 of 43
<PAGE>

         iv)  affect adversely the right of the Surviving Corporation and its
              Subsidiaries to own its assets and to operate its businesses (and
              no such injunction, judgment, order, decree, ruling, or charge
              shall be in effect);

     f)  CSC shall have delivered to Vianet and CAC a certificate to the effect
         that each of the conditions specified above in Section IV has been
         satisfied in all respects;

     g)  Vianet and CAC shall have received from counsel to CSC an opinion in
         form and substance as set forth in Exhibit VII (1) (g) attached hereto,
         addressed to Vianet and CAC, and dated as of the Closing Date;

     h)  Vianet and CAC shall have received the resignations, effective as of
         the Closing, of each director and officer of CSC and its Subsidiaries;

     i)  not less than 60% of the holders of the 8% Secured Convertible Notes
         issued by Vianet between January 11th and October 31st 2001 having an
         aggregate face value of $9,176,00 (the "Convertible Notes") shall have
         converted their holdings into Vianet Shares; and

     j)  all actions to be taken by CSC in connection with consummation of the
         transactions contemplated hereby and all certificates, opinions,
         instruments, and other documents required to effect the transactions
         contemplated hereby will be reasonably satisfactory in form and
         substance to CAC and Vianet.

     k)  The Number of Vianet shares to be issued to CSC shareholders as
         indicated in Exhibit II (4) (e) (i) shall have been determined to the
         satisfaction of Vianet.

     l)  CSC shall have provided the Disclosure Schedule as indicated in Section
         III and Vianet shall be satisfied that the Disclosure Schedule does not
         reveal any Material Adverse Effect.

     CAC and Vianet may waive any condition specified in this Section VII if
     they execute a writing so stating at or prior to the Closing.

2)   CONDITIONS TO OBLIGATION OF CSC. The obligation of CSC to consummate the
     transactions to be performed by it in connection with the Closing is
     subject to satisfaction of the following conditions:

     a)  The representations and warranties of Vianet and CAC set forth in this
         Agreement above shall be true and correct in all material respects at
         and as of the Closing Date;

     b)  Vianet and CAC shall each have performed and complied with all of its
         covenants hereunder in all material respects through the Closing;

     c)  No action, suit or proceeding shall be pending or threatened before any
         court or quasi-judicial or administrative agency of any federal, state,
         local or foreign jurisdiction or before any arbitrator wherein an
         unfavorable injunction, judgment, order, decree, ruling or charge would

         i)   prevent consummation of any of the transactions contemplated by
              this Agreement or

                                 Page 33 of 43
<PAGE>

         ii)  cause any of the transactions contemplated by this Agreement to be
              rescinded following consummation;

     d)  Vianet and CAC shall have delivered to CSC a certificate to the effect
         that each of the conditions specified above in Section V is satisfied
         in all respects;

     e)  This Agreement and the Merger shall have received the Requisite CSC
         Shareholder Approval;

     f)  This Agreement and the Merger shall have received the Requisite Vianet
         Board Approval;

     g)  CSC shall have received from counsel to Vianet and CAC an opinion in
         form and substance as set forth in Exhibit VII (2) (g) attached hereto,
         addressed to CSC, and dated as of the Closing Date;

     h)  All actions to be taken by CAC and Vianet in connection with
         consummation of the transactions contemplated hereby and all
         certificates, opinions, instruments, and other documents required to
         effect the transactions contemplated hereby will be reasonably
         satisfactory in form and substance to CSC.

     i)  The Number of Vianet shares to be issued to CSC shareholders as
         indicated in Exhibit II (4) (e) (i) shall have been determined to the
         satisfaction of CSC.

     j)  not less than 60% of the holders of the Convertible Notes shall have
         converted their holdings into Vianet Shares.

CSC may waive any condition specified in this Section VII if it executes a
writing so stating at or prior to the Closing.

VIII. SURVIVAL AND INDEMNIFICATION.

1)   SURVIVAL AND INDEMNIFICATION. The representations and warranties of CSC
     contained in this Agreement shall survive the Closing hereunder and
     continue in full force and effect thereafter until the second anniversary
     of the Closing Date except for the representations set forth in Section IV
     (12) and Section IV (27) which shall survive the Closing until the fifth
     (5th) anniversary of the Closing Date. Covenants and agreements set forth
     in this Agreement to be performed after the Closing shall survive the
     Closing in accordance with their respective terms. No claim shall be made
     or action brought by any party after the Closing for the breach of any
     representation or warranty in this Agreement or in any instrument delivered
     pursuant to this Agreement or with respect to any agreement or covenant in
     this Agreement or in any instrument delivered pursuant to this Agreement
     after the second anniversary of the Closing Date, except with respect to
     those representations and warranties set forth in Section IV (12) and
     Section IV (27), which may be brought at any time until the fifth (5th)
     anniversary of the Closing Date, and except with respect to those covenants
     that by their terms contemplate performance after the Closing.

                                 Page 34 of 43
<PAGE>

2)   INDEMNIFICATION BY CSC. CSC agrees to indemnify and hold harmless Vianet
     and its Subsidiaries and Affiliates (including, after the Effective Time,
     the Surviving Corporation and its subsidiaries) (collectively, the "Vianet
     Group"), and the officers, directors and employees of the Vianet Group and
     their successors and assigns (all of the foregoing entities and individuals
     to be referred to hereafter as the "Vianet Indemnified Persons") from and
     against any and all Adverse Consequences that any Vianet Indemnified Person
     may suffer resulting from, arising out of, relating to, in the nature of,
     or caused by:

     a)  any inaccuracy in any of the representations and warranties of CSC set
         forth in this Agreement;

     b)  any failure of CSC (prior to Closing) to comply with any of the
         obligations, covenants or agreements contained in this Agreement;

3)   INDEMNIFICATION BY VIANET. Vianet agrees to indemnify and hold harmless the
     CSC Stockholders from and against any and all Adverse Consequences that the
     CSC Stockholders may suffer resulting from, arising out of, relating to, in
     the nature of, or caused by:

     a)  any inaccuracy in any of the representations and warranties of Vianet
         or CAC set forth in this Agreement; or

     b)  any failure of Vianet or CAC to comply with any of their obligations,
         covenants or agreements contained in this
         Agreement.

4)   MATTERS INVOLVING THIRD PARTIES.

     a)  If any third party shall notify either a Vianet Indemnified Person or
         the CSC Stockholders, as the case may be (in either case an
         "Indemnified Party") with respect to any matter (a "Third Party Claim")
         which may give rise to a claim for indemnification against any other
         party (the "Indemnifying Party") under this Section 9, then the
         Indemnified Party shall promptly notify each Indemnifying Party Thereof
         in writing; provided, however, that no delay on the part of the
         Indemnified Party in notifying any Indemnifying Party shall relieve the
         Indemnifying Party from any obligation hereunder unless (and then
         solely to the extent) the Indemnifying Party thereby is prejudiced.

     b)  Any Indemnifying Party will have the right to defend the Indemnified
         Party against the Third Party Claim with counsel of its choice
         reasonably satisfactory to the Indemnified Party so long as

         i)   the Third Party Claim involves only money damages and does not
              seek an injunction or other equitable relief,

         ii)  settlement of, or an adverse judgment with respect to, the Third
              Party Claim is not, in the good faith judgment of the Indemnified
              Party, likely to establish a precedential custom or practice
              materially adverse to the continuing business interests of the
              Indemnified Party, and

         iii) the Indemnifying Party conducts the defense of the Third Party
              Claim actively and diligently.

                                 Page 35 of 43
<PAGE>

     c)  So long as the Indemnifying Party is conducting the defense of the
         Third Party Claim in accordance with Section VIII (4):

         i)   the Indemnified Party may retain separate co-counsel at its sole
              cost and expense and participate in the defense of the Third Party
              Claim;

         ii)  the Indemnified Party will not consent to the entry of any
              judgment or enter into any settlement with respect to the Third
              Party Claim without the prior written consent of the Indemnifying
              Party (not to be withheld unreasonably); and

         iii) the Indemnifying Party will not consent to the entry of any
              judgment or enter into any settlement with respect to the Third
              Party Claim without the prior written consent of the Indemnified
              Party (not to be withheld unreasonably).

     d)  In the event any of the conditions in Section VII (4) (b) above is or
         becomes unsatisfied, however,

         i)   the Indemnified Party may defend against, and consent to the entry
              of any judgment or enter into any settlement with respect to, the
              Third Party Claim in any manner it reasonably may deem appropriate
              (and the Indemnified Party need not consult with, or obtain any
              consent from, any Indemnifying Party in connection therewith);

         ii)  the Indemnifying Parties will reimburse the Indemnified Party
              promptly and periodically for the costs of defending against the
              Third Party Claim (including reasonable attorneys' fees and
              expenses), and

         iii) the Indemnifying Parties will remain responsible for any Adverse
              Consequences the Indemnified Party may suffer resulting from,
              arising out of, relating to, in the nature of, or caused by the
              Third Party Claim to the fullest extent provided in this Section
              VIII.

5)   LIMITS ON INDEMNIFICATION. Notwithstanding anything to the contrary
     contained in this Section IX , except as provided in the following
     sentence: there shall be no amount payable by Vianet or any Principal
     Stockholder pursuant to his indemnification obligations under this Section
     IX, unless and until the cumulative amount of all Adverse Consequences
     incurred by the party to be indemnified under this Section IX exceeds
     $200,000, in which event the party to be indemnified shall be entitled to
     recover from the indemnifying party pursuant to this Section IX the amount
     of such Adverse Consequences in excess of $200,000. The limitations set
     forth in the foregoing sentence shall not apply to any Adverse Consequences
     arising out of any breach of the representations and warranties in Section
     IV (12) or Section IV (27) of this Agreement.

6)   INSURANCE PROCEEDS. The amount of any Adverse Consequences otherwise
     recoverable under this Section IX by any Indemnified Party shall be reduced
     by (i) any amounts recovered by the Indemnified Party under insurance
     policies (net of any costs incurred in connection with the collection
     thereof) (it being understood that an Indemnified Party shall use its
     commercially reasonable efforts to timely pursue all reasonable remedies
     against applicable insurers) and (ii) any tax benefits realized by the
     Indemnified Party resulting from any amounts recovered under insurance
     policies.

                                 Page 36 of 43
<PAGE>

7)   EXCLUSIVE REMEDY. Each of Vianet and CAC acknowledges and agrees that it
     will not assert, except pursuant to and as permitted by this Section IX,
     any claim against any Principal Stockholder or any employee, office or
     director of CSC or any of its Subsidiaries for any inaccuracies,
     misstatements or omissions with respect to information furnished to Vianet
     and CAC in connection with the transactions contemplated hereby, it being
     agreed and understood that indemnification under this Section IX shall be
     the sole and exclusive remedy for any such inaccuracies, misstatements or
     omissions except that the limitation of this Section IX (8) shall not apply
     in the case of the fraudulent provision of information.

8)   EFFECT OF KNOWLEDGE. Notwithstanding anything to the contrary contained in
     this Agreement, no claim for indemnification may be asserted by any member
     of the Vianet Group against any Principal Stockholder under this Section __
     in respect of any fact, event or circumstance giving rise to such claim
     that was discovered by or known to Vianet or CAC on or before the Closing,
     provided that, the Principal Stockholders shall have the burden of proving
     discovery or knowledge by Vianet or CAC.

IX.  TERMINATION.

1)   TERMINATION OF AGREEMENT. Either of the Parties may terminate this
     agreement with the prior authorization of its board of directors (whether
     before or after stockholder approval) as provided below:

     a)  the Parties may terminate this Agreement by mutual written consent at
         any time prior to the Effective Time;

     b)  Vianet and CAC may terminate this Agreement by giving written notice to
         CSC and the Principal Stockholders at any time prior to the Effective
         Time

         i)   in the event CSC has breached in any material respect any
              representation, warranty, or covenant contained in this Agreement,
              Vianet or CAC has notified CSC of the breach, and the breach has
              continued without cure for a period of ten (10) days after the
              notice of breach and such breach results in the failure to be
              satisfied of any condition precedent to the obligation of Vianet
              or CAC to consummate the transactions contemplated hereby; or

         ii)  if the Closing shall not have occurred on or before , February 28,
              2002 by reason of the failure of any condition precedent under
              Section VII (1) hereof (unless the failure results primarily from
              Vianet or CAC breaching any representation, warranty, or covenant
              contained in this Agreement);

     c)  CSC may terminate this Agreement by giving written notice to Vianet and
         CAC at any time prior to the Effective Time:

         i)   in the event Vianet or CAC has breached in any material respect
              any representation, warranty, or covenant contained in this
              Agreement, CSC has notified Vianet and CAC of the breach, and the
              breach has continued without cure for a period of ten (10) days
              after the notice of breach and such breach results in the failure
              to be satisfied of any condition precedent to the obligation of
              CSC and the Principal Stockholders to consummate the transactions
              contemplated hereby; or

                                 Page 37 of 43
<PAGE>

         ii)  if the Closing shall not have occurred on or before February 28,
              2002 by reason of the failure of any condition precedent under
              Section VII (2) hereof (unless the failure results primarily from
              CSC breaching any representation, warranty, or covenant contained
              in this Agreement); or

     d)  any Party may terminate this Agreement by giving written notice to the
         other Party at any time in the event this Agreement and the Merger fail
         to receive the Requisite CSC Stockholder Approval prior to December 27,
         2001.

2)   EFFECT OF TERMINATION. If any Party terminates this Agreement pursuant to
     Section X (1) above, all rights and obligations of the Parties hereunder
     shall terminate without any liability of any Party to any other Party
     (except for any liability of any Party then in breach); provided, however,
     that the confidentiality provisions contained in Section VI (5) above and
     expense provisions contained in Section XI (12) shall survive any such
     termination.

X.   MISCELLANEOUS.

1)   PRESS RELEASES AND PUBLIC ANNOUNCEMENTS. No Party shall issue any press
     release or make any public announcement relating to the subject matter of
     this Agreement without the prior written approval of the other party;
     provided, however, that Vianet may make any public disclosure it believes
     in good faith and that it is advised by legal counsel is required by
     applicable law or any listing or trading agreement concerning its
     publicly-traded securities.

2)   NO THIRD PARTY BENEFICIARIES. This Agreement shall not confer any rights or
     remedies upon any Person other than the Parties and their respective
     successors and permitted assigns; provided, however, that the provisions in
     Section II above concerning issuance of the Vianet Shares are intended for
     the benefit of the CSC Stockholders are intended for the benefit of the
     holders thereof, and the provisions of Section II (8) regarding the
     registration of the Vianet shares are intended for the benefit of the CSC
     Stockholders

3)   ENTIRE AGREEMENT. This Agreement (including the documents referred to
     herein) constitutes the entire agreement between the Parties and supersedes
     any prior understandings, agreements, or representations by or between the
     Parties, written or oral, to the extent they relate in any way to the
     subject matter hereof.

4)   SUCCESSION AND ASSIGNMENT. This Agreement shall be binding upon and inure
     to the benefit of the Parties named herein and their respective successors
     and permitted assigns. No Party may assign either this Agreement or any of
     its rights, interests, or obligations hereunder without the prior written
     approval of the other Party.

                                 Page 38 of 43
<PAGE>

5)   COUNTERPARTS. This Agreement may be executed in one or more counterparts,
     each of which shall be deemed an original but all of which together will
     constitute one and the same instrument.

6)   HEADINGS. The section headings contained in this Agreement are inserted for
     convenience only and shall not affect in any way the meaning or
     interpretation of this Agreement.

7)   NOTICES. All notices, requests, demands, claims, and other communications
     hereunder will be in writing. Any notice, request, demand, claim, or other
     communication hereunder shall be deemed duly given if delivered personally
     (in such case, on the date of delivery), if sent by registered or certified
     mail, return receipt requested, postage prepaid (in such case, three days
     after mailing) or if by nationally recognized overnight courier (in such
     case, on the date of delivery as confirmed by such courier), and addressed
     to the intended recipient as set forth below:

     If to Vianet or CAC :

                           Vianet Technologies, Inc.
                           6509 Windcrest, Suite 160,
                           Plano, Texas 75024
                           Attn: Jeremy Posner
                           Telecopier No.: (972)-608-0780

     With a copy to:

                           Sichenzia, Ross, Friedman & Ference LLP
                           135 West 50th Street, 20th Floor
                           New York, New York 10020
                           Attn:   Richard A. Friedman, Esq.
                           Telecopier No.: (212) 664-7329

     If to CSC:

                           Comm-Services Corporation
                           6509 Windcrest, Suite 160,
                           Plano, Texas 75024
                           Attn:  Victor Goetz
                           Telecopier No.: _____________

     With a copy to:

                           _______________
                           _______________
                           Attn:  _____________
                           Telecopier No.: _____________

                                 Page 39 of 43
<PAGE>

     Any Party may send any notice, request, demand, claim, or other
     communication hereunder to the intended recipient at the address set forth
     above using any other means (including personal delivery, expedited
     courier, messenger service, telecopy, telex, ordinary mail, or electronic
     mail), but no such notice, request, demand, claim, or other communication
     shall be deemed to have been duly given unless and until it actually is
     received by the intended recipient. Any Party may change the address to
     which notices, requests, demands, claims, and other communications
     hereunder are to be delivered by giving the other Party notice in the
     manner herein set forth.

8)   GOVERNING LAW; CONSENT TO JURISDICTION. This Agreement shall be governed by
     and construed in accordance with the domestic laws of the State of Delaware
     without giving effect to any choice or conflict of law provision or rule
     (whether of the State of Delaware or any other jurisdiction) that would
     cause the application of the laws of any jurisdiction other than the State
     of Delaware. Each of the parties hereto hereby irrevocably submits to the
     exclusive jurisdiction of the state or federal courts located in Texas, in
     connection with any suit, action or other proceeding arising out of or
     relating to this Agreement and the transactions contemplated hereby, and
     hereby agree not to assert, by way of motion, as a defense, or otherwise in
     any such suit, action or proceeding that the suit, action or proceeding is
     brought in an inconvenient forum, that the venue of the suit, action or
     proceeding is improper or that this Agreement or the subject matter hereof
     may not be enforced by such courts.

9)   AMENDMENT. To the extent permitted by applicable law, this Agreement may be
     amended only in writing signed by all parties hereto, approved by each of
     the respective boards of directors of Vianet and CAC and the Board of
     Directors of the CSC, at any time before or after adoption of this
     agreement by requisite CSC Stockholder approval; provided, however, that,
     after any such approval, no amendment shall be made without the approval of
     such shareholders except as permitted by the Delaware General Corporation
     Law.

10)  EXTENSION; WAIVER. At any time prior to the Effective Time, any party
     hereto, by action taken by or on behalf of their respective boards of
     directors, if applicable, may:

     a)  extend the time for the performance of any of the obligations or other
         acts of the other parties hereto,

     b)  waive any inaccuracies in the representations and warranties of any
         other party contained herein or in any document, certificate or writing
         delivered pursuant hereto by any other party, or

     c)  waive compliance with any of the agreements or conditions contained
         herein or any breach thereof. Any agreement on the part of any party to
         any such extension or waiver shall be valid only if set forth in an
         instrument in writing signed on behalf of such party. The failure of
         any party hereto to assert any of its rights hereunder shall not
         constitute a waiver of such rights.

                                 Page 40 of 43
<PAGE>

11)  SEVERABILITY. Any term or provision of this Agreement that is invalid or
     unenforceable in any situation in any jurisdiction shall not affect the
     validity or enforceability of the remaining terms and provisions hereof or
     the validity or enforceability of the offending term or provision in any
     other situation or in any other jurisdiction.

12)  EXPENSES. Each of the Parties will bear its own costs and expenses
     (including legal fees and expenses) incurred in connection with this
     Agreement and the transactions contemplated hereby.

13)  CONSTRUCTION. The Parties have participated jointly in the negotiation and
     drafting of this Agreement. In the event an ambiguity or question of intent
     or interpretation arises, this Agreement shall be construed as if drafted
     jointly by the Parties and no presumption or burden of proof shall arise
     favoring or disfavoring any Party by virtue of the authorship of any of the
     provisions of this Agreement. Any reference to any federal, state, local,
     or foreign statute or law shall be deemed also to refer to all rules and
     regulations promulgated thereunder, unless the context otherwise requires.
     The word "including" shall mean including without limitation. Any reference
     to the masculine shall, if the context otherwise requires, be deemed a
     reference to the feminine and vice versa; any reference to the singular
     shall, if the context otherwise requires, be deemed a reference to the
     plural, and vice versa.

14)  INCORPORATION OF EXHIBITS AND SCHEDULES. The Exhibits and Schedules
     identified in this Agreement are incorporated herein by reference and made
     a part hereof.

15)  DISPUTE RESOLUTION. The parties desire that any controversy or claim
     arising out of or related to this Agreement or the transactions
     contemplated hereby be resolved in an expeditious and efficient manner
     exclusively in accordance with this dispute resolution procedure. A dispute
     under this clause shall be initiated by delivering written notice to the
     other party briefly stating the nature of the dispute and requesting
     resolution. Except as otherwise specified, each party shall bear its own
     costs and fees relating to any dispute. The dispute resolution procedure is
     as follows:

     a)  INFORMAL RESOLUTION. The parties agree that before initiation of any
         legal or arbitration proceeding with respect to any issue arising out
         of the transactions contemplated by this Agreement, they shall use
         their respective representatives to attempt to resolve in good faith
         all disputes between the parties. The parties agree that they will
         cause their respective representatives to meet in person at a mutually
         agreeable location, to attempt in good faith to resolve such dispute
         within fifteen business days of notification of such dispute. In the
         event that the representatives are unable to resolve such a dispute,
         the aggrieved party must refer the dispute to mediation under paragraph
         (b).

                                 Page 41 of 43
<PAGE>

     b)  MEDIATION. In the event any dispute is not resolved by a meeting of the
         parties, the dispute shall be referred to non-binding mediation. The
         mediation shall occur within 40 days of the meeting of the parties.
         Mediation fees shall be split equally among the parties. The mediator
         shall be selected by agreement of the parties or, in the event of no
         agreement, shall be designated by Judicial Arbitration and Mediation
         Services ("JAMS"). The mediation shall be attended by the parties'
         representatives and, if desired, the parties' attorneys.

     c)  ARBITRATION. In the event a dispute is not resolved by mediation
         pursuant to paragraph (b), and the parties thereafter mutually agree,
         in writing, to proceed to binding arbitration, the aggrieved party
         shall refer the dispute to binding arbitration. The arbitration shall
         be governed by the procedures set forth below. The arbitrator shall
         give written notice to the parties of the arbitrator's determination,
         and judgment upon the same may be entered by any court of competent
         jurisdiction.

     d)  SELECTION OF ARBITRATOR. Within 30 days of referral of a dispute to
         arbitration, a single arbitrator will be selected by agreement of the
         parties or, in the event of no agreement, shall be designated by JAMS.
         Unless agreed otherwise by the parties, the arbitrator shall be a
         retired judge with arbitration experience.

     e)  DISCOVERY. The parties agree to submit discovery plans to the
         arbitrator within 15 days following the date that the arbitrator
         accepts his appointment to this matter. The discovery plan will
         describe all discovery contemplated. The arbitrator will schedule a
         meeting of counsel to occur within 15 days of his receipt of the
         discovery plans, at which time the arbitrator will issue a written
         order scheduling dates for all depositions and completion dates for all
         additional discovery. The written discovery plan may only be modified
         by a written order from the arbitrator. The parties may request, in
         their discovery plans, and the arbitrator shall be empowered to impose,
         limitations on the nature and quantity of discovery to be conducted.

     f)  PROCEDURE. The arbitration hearing shall take place in Dallas, Texas
         within 90 days of the arbitrator's acceptance of his appointment. The
         hearing is not to exceed two (2) days. Introduction of evidence and
         testimony at the hearing will be subject to the Federal Rules of Civil
         Procedure. Each party is entitled to be heard, to present material
         evidence and testimony, and to cross-examine witnesses appearing at the
         hearing.

16)  LIMITATION ON DAMAGES. The arbitrator may not award exemplary or punitive
     damages except in the case of the fraud.

                                 Page 42 of 43
<PAGE>

IN WITNESS WHEREOF, the Parties hereto have executed this Agreement on the date
first above written.

VIANET TECHNOLOGIES, INC.

By: /s/ Peter Ianace
    ----------------------

Name: Peter Ianace
      --------------------

Title: Chief Executive Officer
       -----------------------

COMSERVICES ACQUISITION  CORP.

By: /s/ Peter Ianace
    ----------------------

Name: Peter Ianace
      --------------------

Title: Chief Executive Officer
       -----------------------

COMSERVICES CORPORATION

By: /s/ Gregory Somers
    ----------------------

Name: Gregory Somers
      --------------------

Title: President
       -------------------

                                 Page 43 of 43

<PAGE>

                             EXHIBIT II (4) (d) (i)

                                Conversion Ratio

For the purposes of Section II (4) (d) (i) the Conversion Ratio will be
determined as follows:

1.       The aggregate number of outstanding Vianet common shares issued or
         liable to be issued as of the date of the Closing will be determined,
         including all warrants, options, convertible instruments or any other
         claim for the issuance of common shares other than the Contingent
         Shares as identified in Paragraph 5 of this Exhibit II (4) (d) (i) (the
         "Aggregate Outstanding Shares of Vianet".)

2.       The number of Vianet shares to be issued to CSC shareholders in total
         on Closing (the "Number of Vianet shares to be issued to CSC
         shareholders") will be that number of shares which provides to the CSC
         shareholders in total an interest equal to sixty percent (60%) of the
         total common shares or claim for common shares of Vianet immediately
         following Closing, which shall be the product of the sum of the
         Aggregate Outstanding Shares of Vianet and the Number of Vianet shares
         to be issued to CSC shareholders.

3.       The Conversion Ratio shall be the product of the Number of Vianet
         shares to be issued to CSC shareholders divided by the aggregate number
         of outstanding CSC common shares issued or liable to be issued as of
         the date of the Closing, including all warrants, options, convertible
         instruments or any other claim for the issuance of common shares.

4.       At Closing there will be potential claims on Vianet to issue up to a
         further 10,469,322 common shares, contingent on certain events which
         may or may not occur (the "Contingent Shares"). The Contingent Shares
         are listed in the Appendix to this Exhibit. In the event that Vianet is
         called on to issue all or any of the Contingent Shares, for every share
         so issued an additional 1.5 common shares will be issued to the CSC
         shareholders, such shares being distributed among the CSC shareholders
         in the same proportion as the Vianet common shares to be issued on
         Closing.

<PAGE>

                       APPENDIX TO EXHIBIT II (4) (d) (i)

                                Contingent Shares

                            (As of December 12, 2001)

Class A Note conversions          6,549,991        Potential future obligations

RBC                                 500,000        Issuable if share below $3

Warrant Tender Offer              3,419,331        Tender offer closes on
                                                   December 27, 2001

                             --------------
                                 10,469,322
                             --------------

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