<PAGE>

                                                                    EXHIBIT 10.6

                          MOFFETT PARK OFFICE CENTER

                                     LEASE



                                By and Between

                            Cilker Revocable Trust
                         U.T.A. dated October 9, 1990
                                  ("Lessor")



                                      and



                   Resonate, Inc., a California Corporation
                                  ("Lessee")



                 For the 15,915 Rentable Square Foot Premises
                 Located at 385 Moffett Park Drive, Suite 210,
                          Sunnyvale, California 94089

                                       i
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                               Table of Contents

<TABLE>
<S>                                                                            <C>
1  BASIC LEASE PROVISIONS.....................................................  1

 1.1  Parties.................................................................  1
 1.2   Premises...............................................................  1
 1.3   Building...............................................................  1
 1.4   Use....................................................................  1
 1.5   Term...................................................................  2
 1.6   Base Rent..............................................................  2
 1.7   Base Rent Increase.....................................................  2
 1.8   Rent Paid Upon Execution...............................................  2
 1.9   Security Deposit.......................................................  2
 1.10  Lessee's Share of Operating Expense Increase...........................  2
 1.11  Tenant Improvements....................................................  2
 1.12  Load Factor............................................................  2
 1.13  Additional Rent........................................................  3

2  PREMISES, BUILDING, OFFICE BUILDING PROJECT AND COMMON AREAS...............  3

 2.1   Premises...............................................................  3
 2.2   Vehicle Parking........................................................  3
 2.3   Common Areas - Definition..............................................  3
 2.4   Common Area - Rules and Regulations....................................  4
 2.5   Common Area - Changes..................................................  4

3  TERM.......................................................................  5

 3.1   Term...................................................................  5

4  RENT.......................................................................  5

 4.1   Base Monthly Rent......................................................  5
 4.2   Operating Expenses.....................................................  6

5  USE........................................................................  8

 5.1   Use....................................................................  8
 5.2   Lessee's Compliance with Law...........................................  8
 5.3   Condition of Premises..................................................  9
 5.4   Hazardous Material.....................................................  9

6  MAINTENANCE, REPAIRS, ALTERATIONS AND COMMON AREA SERVICES................. 11

 6.1   Lessor's Obligations................................................... 12
 6.2   Lessee's Obligations................................................... 12
 6.3   Alterations and Additions.............................................. 13
 6.4   Utility Additions...................................................... 15

7  INSURANCE; INDEMNITY....................................................... 15

 7.1   Liability Insurance - Lessee........................................... 15
 7.2   Property Insurance - Lessee............................................ 16
 7.3   Insurance - Lessor..................................................... 16
 7.4   Insurance Policies..................................................... 16
 7.5   Waiver of Subrogation.................................................. 17
 7.6   Indemnity.............................................................. 17
 7.7   Exemption of Lessor from Liability..................................... 18
 7.8   No Representation of Adequate Coverage................................. 18

8  DAMAGE OR DESTRUCTION...................................................... 19

 8.1   Definitions............................................................ 19
 8.2   Premises Damage; Premises Partial Damage............................... 19
 8.3   Premises Total Destruction; Office Building Project Total Destruction.. 20
 8.4   Damage Near End of Term................................................ 21
 8.5   Abatement of Rent; Lessee's Remedies................................... 21
</TABLE>

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                               Table of Contents

<TABLE>
<S>                                                                            <C>
 8.6   Termination............................................................ 21
 8.7   Waiver................................................................. 22

9  REAL PROPERTY TAXES........................................................ 22

 9.1   Payment of Taxes....................................................... 22
 9.2   Additional Improvements................................................ 22
 9.3   Definition of Real Property Tax........................................ 22
 9.4   Joint Assessment....................................................... 23
 9.5   Personal Property Taxes................................................ 23

10  UTILITIES AND SERVICES.................................................... 23

 10.1  Services Provided by Lessor............................................ 23
 10.2  Services Exclusive to Lessee........................................... 24
 10.3  Hours of Service....................................................... 24
 10.4  Excess Usage by Lessee................................................. 24
 10.5  Interruptions.......................................................... 25

11  OPTION TO EXTEND.......................................................... 25

12  ASSIGNMENT AND SUBLETTING................................................. 25

 12.1  Lessor's Consent Required.............................................. 25
 12.2  Lessee Affiliate....................................................... 26
 12.3  Terms and Conditions Applicable to Assignment and Subletting........... 26
 12.4  Additional Terms and Conditions Applicable to Subletting............... 28
 12.5  Lessor's Expenses...................................................... 29
 12.6  Conditions to Consent.................................................. 29

13  DEFAULT; REMEDIES......................................................... 30

 13.1  Default................................................................ 31
 13.2  Remedies............................................................... 32
 13.3  Default by Lessor...................................................... 32
 13.4  Late Charges........................................................... 32

14  CONDEMNATION.............................................................. 32

15  BROKER'S FEE.............................................................. 33

16  ESTOPPEL CERTIFICATE...................................................... 34

17  LESSOR'S LIABILITY........................................................ 34

18  SEVERABILITY.............................................................. 35

19  INTEREST ON PAST-DUE OBLIGATIONS.......................................... 35

20  TIME OF ESSENCE........................................................... 35

21  ADDITIONAL RENT........................................................... 35

22  INCORPORATION OF PRIOR AGREEMENTS; AMENDMENTS............................. 35

23  NOTICES................................................................... 36

24  WAIVERS................................................................... 36

25  RECORDING................................................................. 36

26  NO RIGHT TO HOLD OVER..................................................... 36
</TABLE>

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                               Table of Contents

<TABLE>
<S>                                                                            <C>
27  CUMULATIVE REMEDIES....................................................... 37

28  COVENANTS AND CONDITIONS.................................................. 37

29  BINDING EFFECT; CHOICE OF LAW............................................. 37

30  SUBORDINATION............................................................. 37

31  ATTORNEYS' FEES........................................................... 38

 31.1  Attorneys' Fees........................................................ 38
 31.2  Reimbursement.......................................................... 38
 31.3  Default................................................................ 38

32  LESSOR'S ACCESS........................................................... 38

 32.1  Entry Onto Premises.................................................... 38
 32.2  Abatement of Rent...................................................... 39
 32.3  Emergency.............................................................. 39

33  AUCTIONS.................................................................. 39

34  SIGNS..................................................................... 39

35  MERGER.................................................................... 40

36  CONSENTS.................................................................. 40

37  GUARANTOR................................................................. 40

38  QUIET POSSESSION.......................................................... 40

39  SECURITY MEASURES - LESSOR'S RESERVATIONS................................. 40

 39.1  Security Measures...................................................... 40
 39.2  Lessor's Reservations.................................................. 41

40  EASEMENTS................................................................. 41

 40.1  Lessor's Reservations.................................................. 41
 40.2  Obstruction............................................................ 41

41  PERFORMANCE UNDER PROTEST................................................. 41

42  AUTHORITY................................................................. 42

43  NO OFFER.................................................................. 42

44  LENDER MODIFICATION....................................................... 42

45  MULTIPLE PARTIES.......................................................... 42

46  FORCE MAJEURE............................................................. 42

47  TENANT IMPROVEMENTS....................................................... 43

EXHIBIT A  THE PREMISES....................................................... 45

EXHIBIT B  LEGAL DESCRIPTION OF BUILDING...................................... 46

EXHIBIT C  RULES AND REGULATIONS.............................................. 47

EXHIBIT D  PARKING RULES...................................................... 49
</TABLE>

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                               Table of Contents

<TABLE>
<S>                                                                            <C>
EXHIBIT E  FINAL PLANS AND SPECIFICATIONS....................................  50

EXHIBIT F  COMMENCEMENT DATE MEMORANDUM......................................  51

EXHIBIT G  JANITORIAL SERVICES...............................................  52
</TABLE>

                                       v
<PAGE>

          1.    BASIC LEASE PROVISIONS.
                ----------------------

          1.1   Parties.  This Lease, dated, for reference purposes only, as of
                -------
     November 2, 1999 is made by and between CILKER REVOCABLE TRUST U.T.A. dated
     October 9, 1990, herein called "Lessor", and RESONATE, INC., a California
     Corporation, herein called "Lessee".

          1.2   Premises.  Suite Number 210, consisting of approximately
                --------
     fourteen thousand two hundred ten (14,210) usable square feet (USF)
     measured from the centerline of shared walls and to the outside of the
     outside walls; fifteen thousand nine hundred fifteen (15,915) rentable
     square feet (RSF) more or less, including a twelve percent (12%) load
     factor, as defined in Paragraph 1.12.

          Lessee shall have the option to expand the Premises (the "Expansion
     Option") to include (i) Suite No. 105 consisting of approximately 13,624
     rentable square feet, (ii) Suite No. 200 consisting of approximately 24,080
     rentable square feet or (iii) both, on the same terms and conditions of the
     Lease (including the same Base Monthly Rent per rentable square foot),
     effective February 1, 2001, by giving Lessor written notice thereof no
     later than December 1, 2000. Then the total usage square feet will be forty
     seven thousand eight hundred seventy four (47,874), more or less, and total
     rentable square feet is fifty three thousand six hundred nineteen (53,619),
     more or less.

          The Premises for Suite #210 is shown as Exhibit A: The Premises.

          1.3   Building.  Commonly described as being located at 385 Moffett
                --------
     Park Drive in the City of Sunnyvale, County of Santa Clara, State of
     California as defined in Paragraph 2 and on Exhibit B hereto (the
     Building), as measured to the dripline of the outside walls. The total
     rentable square feet of the Building is seventy nine thousand four hundred
     eighty (79,480), more or less.

          1.4   Use.  The Premises shall be used for general office and
                ---
     engineering functions and for no other purposes without the prior written
     consent of Lessor, subject to Paragraph 6.

          1.5   Term.  Four (4) years commencing on the later of December 15,
                ----   --------------
     1999 or the completion date of the Tenant Improvements (Commencement Date)
     and ending on November 30, 2003 (Termination Date) in accordance with
     Exhibit F (Commencement Date Memorandum).

                                     - 1 -
<PAGE>

          1.6   Base Rent.  Forty five thousand and thirty nine Dollars and
                ---------
     fourty five cents($45,039.45) per month, payable on the first day of each
     month, per Paragraph 4.1, commencing on the Commencement Date, on or about
     December 15, 1999.

          1.7   Base Rent Increase.  Monthly Base Rent payable under Paragraph
                ------------------
     1.6 above shall be adjusted as provided in Paragraph 4.1 below.

          1.8   Rent Paid Upon Execution.  Forty five  thousand and thirty nine
                ------------------------
     Dollars and fourty five cents($45,039.45) for the first month of the Term.

          1.9   Security Deposit.  One (1) month rent of Forty five thousand and
     thirty nine Dollars and fourty five cents($45,039.45) due December 15,
     1999. In the event Lessee exercises the Expansion Option with respect to
     Suite 105, the Security Deposit shall be increased by $39,839.83 effective
     February 1, 2001. In the event Lessee exercises the Expansion Option with
     respect to Suite 200, the Security Deposit shall be increased by $70,415.68
     effective February 1, 2001.

          1.10  Lessee's Share of Operating Expenses.  Twenty percent (20%)
                ------------------------------------
     through January 30, 2001, with a proportionate increase in the event the
     Premises are expanded pursuant to the Expansion Option.

          1.11  Tenant Improvements.  The Tenant Improvement allowance for Suite
                -------------------
     210 shall be equal to the total amount set forth in the estimate attached
     hereto as Exhibit H, which total amount shall be paid by Lessor and Lessee
     as set forth in Exhibit H.

          1.12  Load Factor.  Based on the Total Square Foot Space of the lobby,
                -----------
     common hallways, elevator, common bathrooms, utility rooms, janitorial,
     storage rooms and other shared space expressed as a percentage of the total
     Building area measured to the outer surface of the outside walls.  For this
     building, the load factor is calculated to be twelve percent (12%).

          1.13  Additional Rent.  The additional rent for HVAC that exceeds the
                ---------------
     hours of service provided in Paragraph 10.3 is covered in Paragraph 10.4.

          2.    PREMISES, BUILDING, OFFICE BUILDING PROJECT PARKING AND COMMON
                --------------------------------------------------------------
AREAS.
-----

                                     - 2 -
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          2.1   Premises.  The Premises are a portion of a building, herein
                --------
     sometimes referred to as the "Building" identified in Paragraph 1.3 of the
     Basic Lease Provisions.  "Building" shall include adjacent parking
     structures used in connection therewith.  The Premises, the Building, the
     Common Areas, the land upon which the same are located, along with all
     other improvements thereon or thereunder, are herein collectively referred
     to as the "Office Building Project".  Lessor hereby leases to Lessee and
     Lessee leases from Lessor for the term, at the rental, and upon all of the
     conditions set forth herein, the real property referred to in the Basic
     Lease Provisions, Paragraph 1.2, as the "Premises", including rights to the
     Common Areas as hereinafter specified.

          2.2   Vehicle Parking.  So long as Lessee is not in default beyond
                ---------------
     applicable notice and cure period, and subject to the rules and regulations
     attached hereto as Exhibit D, and as established by Lessor from time to
     time, Lessee shall be entitled to use fifty seven (57) parking spaces in
     the Common Area of the Office Building Project. If Lessee knowingly
     commits, permits or allows any of the prohibited activities described in
     the Lease or the rules then in effect, then Lessor shall have the right,
     after making reasonable effort to notify Lessee of the prohibited activity,
     in addition to such other rights and remedies that it may have, to remove
     or tow away any vehicle involved in such prohibited activity, or otherwise
     take action to cure such prohibited activity, and charge the cost to
     Lessee, which cost shall be immediately payable upon demand by Lessor.

          2.3   Common Areas - Definition.  The term "Common Areas" is defined
                -------------------------
     as all areas and facilities outside the Premises and within the exterior
     boundary line of the Office Building Project that are provided and
     designated by the Lessor from time to time for the general nonexclusive use
     of Lessor, Lessee and of other lessees of the Office Building Project and
     their respective employees, suppliers, shippers, customers and invitees,
     including but not limited to common entrances, parking areas to the extent
     not otherwise prohibited by this Lease, roadways and walks, walkways,
     parkways, ramps, driveways, striping, bumpers, irrigation systems, and
     Common Area lighting facilities and landscaped areas.

          2.4   Common Area - Rules and Regulations.  Lessee agrees to abide by
                -----------------------------------
     and conform to the rules and regulations attached hereto as Exhibit C with
     respect to the Office Building Project and Common Areas and to cause its
     employees, suppliers, shippers, customers, and invitees to so abide and
     conform to such rules and

                                     - 3 -
<PAGE>

     regulations. Lessor or such other person(s) as Lessor may appoint shall
     have the exclusive control and management of the Common Areas and shall
     have the right to enforce said rules and regulations and may, from time to
     time, reasonably modify or amend and enforce said rules and regulations.

          2.5   Common Areas - Changes.  Provided the following changes do not
                ----------------------
     significantly interfere with Lessee's business and are not inconsistent
     with other first-class office buildings in the vicinity, Lessor shall have
     the right in Lessor's sole discretion, from time to time:

                (a)  To make changes to the Building exterior and Common Areas,
     including, without limitation, changes in the location, size, shape,
     number, and appearance thereof, including but not limited to the windows,
     air shafts, driveways, entrances, parking spaces, parking areas, loading
     and unloading areas, ingress, egress, direction of traffic, landscaped
     areas, walkways and the outside walls and the roof of the Building;

                (b)  To close temporarily any of the Common Areas for
     maintenance purposes so long as reasonable access to the Premises remains
     available;

                (c)  To designate other land and improvements outside the
     boundaries of the Office Building Project to be a part of the Common Areas,
     provided that such other land and improvements have a reasonable and
     functional relationship to the Office Building Project and may increase the
     financial obligations of Lessee under this Lease with Lessee's consent,
     which shall not be unreasonably withheld;

                (d)  To add additional improvements to the Common Areas;

                (e)  To use the Common Areas while engaged in making additional
     improvements, repairs or alterations to the Office Building Project, or any
     portion thereof;

                (f)  To do and perform such other acts and make such other
     changes in, to or with respect to the Common Areas and Office Building
     Project as Lessor may, in the exercise of sound business judgment, deem to
     be appropriate.

                (g)  Lessor shall use its best efforts to minimize disruption to
     Lessee's business.

          3.    TERM.
                ----

                                     - 4 -
<PAGE>

          3.1   Term.  The Term and Commencement Date of this Lease shall be as
                ----
     specified in Paragraph 1.5 of the Basic Lease Provisions.

          4.    RENT.
                ----

          4.1   Base Monthly Rent.  Lessee shall pay to Lessor the Base Monthly
                -----------------
     Rent for the Premises set forth in Paragraph 1.6 of the Basic Lease
     Provisions and this Paragraph 4.1 herein, without offset or deduction,
     payable on the first day of each month (or in the event of a partial month,
     on the first day of such partial month), except for the deduction described
     in Paragraph 1.11.  Lessee shall pay Lessor upon execution hereof the
     advance Base Rent described in Paragraph 1.6 of the Basic Lease Provisions.

     Rent for any period during the term hereof which is for less than one month
     shall be prorated based upon the actual number of days of the calendar
     month involved.  Rent shall be payable in lawful money of the United States
     to Lessor at the address stated herein or to such other persons or at such
     other places as Lessor may designate in writing.

     Tenant shall pay the Base Monthly Rent on the amount and for the months set
     forth below, and otherwise as provided in this Paragraph 4.1.

          Months   1 - 12         12/01/99-11/30/00- $ 45,039.45
          Months  13 - 14         12/01/00-01/30/01- $ 46,539.26
          Months  15 - 24         02/01/01-11/30/01- $ 46,539.26
          Months  25 - 36         12/01/01-11/30/02- $ 48,089.02
          Months  37 - 48         12/01/02-11/30/03- $ 49,690.39
          Months  49 - 60         12/01/03-11/30/04-   100% Fair Market Rate
          Months  61 - 72         12/01/04-11/30/05-   Inc. by 3.33%
          Months  73 - 84         12/01/05-11/30/06-   100% Fair Market Rate

          In the event that Lessee exercises the Expansion Option in month 15
     with respect to Suites 105 or 200, the same Base Monthly Rent per square
     foot shall apply to each Suite for which the Expansion Option is elected.

          4.2   Operating Expenses.  Lessee shall pay to Lessor during the term
                ------------------
     hereof, in addition to the Base Rent, Lessee's Share of Operating Expenses,
     as defined in Paragraph 1.10, of any increases in total Operating Expenses
     for any "Comparison Year", as defined in Paragraph 4.2(d) herein over the
     Operating Expenses for the Base Year, as hereinafter defined, during each

                                     - 5 -
<PAGE>

     calendar year, following the Base Year, of the term of this Lease, in
     accordance with the following provisions:

                (a)     "Lessee's Share of Operating Expenses" is defined in
     Paragraph 1.10 of the Base Lease Provisions.  Lessee's Share of Operating
     Expenses has been established as a percentage determined by dividing the
     approximate rentable square footage of the Premises by the approximate
     total rentable square footage of the Building.  Using this same method of
     determination, the Lessee's Share of Operating Expenses may be redetermined
     by Lessor in the event of a change in the rentable square footage in the
     Building.

                (b)     "Operating Expenses" is defined, for purposes of this
     Lease, to include all costs, if any, incurred by Lessor in the exercise of
     its reasonable discretion, for:

                (i)     The operation, repair, maintenance, and replacement (of
     a non-capital nature), in neat, clean, safe, good order and condition, of
     the Common Areas;

                (ii)    Trash disposal, landscaping, irrigation, replacement of
     plants and trees, janitorial services as delineated in Exhibit F, and
     supplies, sealing and striping the parking area, window and door washing,
     service door and window seals, roof repairs, reserve for painting, sealing
     and striping, and security services;

                (iii)   Any other service to be provided by Lessor that is
     elsewhere in this Lease defined to be an "Operating Expense";

                (iv)    The cost of the premiums for all insurance policy to be
     maintained by Lessor under Paragraph 8 hereof;

                (v)     The amount of the real property taxes to be paid by
     Lessor under Paragraph 9.1 hereof;

                (vi)    The cost of utilities, including water, sewer, gas,
     electricity, and other publicly mandated services to the Building,
     including fire detection systems, fire sprinkler systems and security
     systems;

                (vii)   The cost of monitoring of environmental matters and the
     building HVAC management system;

                (viii)  Replacing, adding, or removing any improvement for
     better security, safety, increased energy efficiency, or as mandated by any
     governmental agency after the Commencement Date, and any repairs or
     removals

                                     - 6 -
<PAGE>

     necessitated thereby, including seismic upgrades, amortized over its useful
     life according to federal income tax regulations or guidelines for
     depreciation thereof (including interest on the unamortized balance as is
     then reasonable in the judgment of Lessor's accountants, provided, however,
     costs incurred to correct violations by Lessor of any law, rule, order or
     regulation prior to the Commencement Date shall not be included as an
     Operating Expense;

                (ix)    Replacements of equipment or improvements to include
     HVAC equipment and monitoring systems, elevator maintenance, plumbing,
     including fire sprinklers, supplies, materials and equipment and tools;
     including maintenance, cost and upkeep of all parking and common areas;
     expenses incurred in an amount necessary to reduce direct expenses; and

                (x)  A management fee attributable to the operation of the
     Office Building Project.

                (c)     Lessee's share of additional rent for capital
     improvements to the common area, grounds, and for improved efficiency and
     appearance of the building, to be amortized by normal accounting practice
     plus interest.

                (d)     "Base Year" is defined, for purposes of this Lease, to
     be the period of ninety-one (91) days (December 1, 1999 through February
     29, 2000 annualized for 365 days).

                (e)     "Comparison Year" is defined, for purposes of this
     Lease, as each 12 months period starting March 1, 2000, during the term of
     this Lease.

                (f)      Lessee's Share of the Operating Expenses identified in
     Paragraphs 4.2(b), 4,2(d) and 4.2(e) shall be payable on a annual or semi-
     annual basis by Lessee after a statement of actual expenses is presented to
     Lessee by Lessor. Lessee shall have the right for one hundred and eighty
     (180) days from receipt of such statement to audit Lessor's books and
     records to verify Lessor's calculations.

                (g)     Notwithstanding the foregoing, Operating Expenses shall
     not include and Lessee shall in no event have any obligation to perform or
     to pay for the following (collectively, "Costs"): (a) Costs occasioned by
     the act, omission or violation of any law by Lessor or any other occupant
     of the Building, or their respective agents,

                                     - 7 -
<PAGE>

     employees or contractors; (b) Costs occasioned by casualty or condemnation;
     (c) Costs of any renovation, improvement, painting or redecorating of any
     portion of the Building not made available for Lessee's use; (d) Costs
     incurred in connection with marketing or advertising the Building, or the
     violation by Lessor or any occupant of the Building (other than Lessee) of
     the terms and conditions of any lease or other agreement; (e) Costs
     incurred in connection with the presence of any Hazardous Material, except
     to the extent caused by the release or emission of the Hazardous Material
     in question by Lessee; (f) Costs which could properly be capitalized under
     generally accepted accounting principles, except those set forth in
     subsections (viii) and (c) of this Section 4.2.

          5.    USE.
                ---

          5.1   Use.  The Premises shall be used and occupied only for the
                ---
     purpose set forth in Paragraph 1.4 of the Basic Lease Provisions or any
     other use which is reasonably comparable to that use and for no other
     purpose.

          5.2   Lessee's Compliance with Law.  Except as otherwise provided in
                ----------------------------
     this Lease, Lessee shall, at Lessee's expense, promptly comply with all
     applicable statutes, ordinances, rules, regulations, orders, the
     requirements of that certain Declaration of Protective Covenants Moffett
     Industrial Park No. 1 (a copy of which is attached hereto as Exhibit G, and
     requirements of any fire insurance underwriters or rating bureaus, now in
     effect or which may hereafter come into effect, whether or not they reflect
     a change in policy from that now existing, during the term or any part of
     the term hereof, relating in any manner to the Premises and the occupation
     and use by Lessee of the Premises.  Lessee shall conduct Lessee's business
     in a lawful manner and shall not use or permit the use of the Premises or
     the Common Areas in any manner that will tend to create waste or nuisance
     or shall tend to disturb other occupants of the Office Building Project.

          5.3   Condition of Premises.  Lessee accepts the Premises and the
                ---------------------
     Office Building Project in their condition existing as of the Commencement
     Date or the date that Lessee takes possession of the Premises (exclusive of
     any latent defects), whichever is earlier, subject to all applicable
     zoning, municipal, county and state laws, ordinances and regulations
     governing and regulating the use of the Premises, and accepts this Lease
     subject thereto and to all matters disclosed thereby and by any

                                     - 8 -
<PAGE>

     exhibits attached hereto. Lessee acknowledges that it has satisfied itself
     by its own independent investigation that the Premises (exclusive of any
     latent defects) are suitable for its intended use, and that neither Lessor
     nor Lessor's agent or agents has made any representation or warranty as to
     the present or further suitability of the Premises, Common Areas, or Office
     Building Project for the conduct of Lessee's business; provided, however,
     Lessor warrants that all plumbing, electrical, mechanical, elevator,
     structural and roof systems shall be in good operating condition on the
     Commencement Date. Notwithstanding any provision to the contrary in this
     Lease, Lessor represents and warrants that as of the Commencement Date the
     Premises (other than the Tenant Improvements to be constructed by Lessee)
     and the Common Areas shall be in compliance with all applicable laws,
     rules, order, regulations and orders, including without limitation, all
     applicable requirements of the Americans with Disabilities Act (ADA) of
     1990 (42 U.S.C. 12101, et. seq.).
                            -------

          5.4   Hazardous Material.
                ------------------

                (a)  Lessee shall not engage in any activities upon or in the
     Office Building Project, nor bring onto, create, or dispose of upon or in
     the Premises or Office Building Project, any Hazardous Material other than
     those in the forms and quantities used in normal office use and building
     management.

                (b)  Lessee shall not engage in any activity upon or in the
     Premises that violates any federal, state or local laws, rules or
     regulations pertaining to Hazardous Material.  Lessee shall promptly, at
     Lessee's sole cost and expense, take all investigatory or remedial actions
     requested or ordered for clean-up of any contamination of the Premises
     created or suffered by Lessee. Provided, however, Lessee shall not be
     liable for such action or clean up if suffered by Lessee as a result of
     Lessor's or other tenants' actions.  Lessee shall comply with any and all
     requirements related to handling, use, storage and disposal of Hazardous
     Materials.

                (c)  Lessee shall indemnify, defend and hold harmless Lessor,
     Lessor's agents, employees, servants, and lenders, from any and all claims,
     losses, liability, demands, damages, costs, offsets, lawsuits, judgments,
     award and expenses, including, but not limited to, attorneys' fees arising
     out of or in connection with any breach of Lessee's obligations under this
     Paragraph 5.4.

                                     - 9 -
<PAGE>

                (d)  Lessee's obligations under this Paragraph 5.4 shall survive
     the ending, termination, and cancellation of this Lease, and no
     termination, cancellation or release agreement entered into by Lessor and
     Lessee shall release Lessee from Lessee's obligations under this Paragraph
     5.4 unless any such agreement expressly sets forth Lessor's intention to so
     release Lessee.

                (e)  The term "Hazardous Material" means any chemical substance:

                     (i)   the presence of which requires investigation,
          regulation or remediation under any federal, state or local statute,
          regulation, ordinance, order, action, policy or common law; or

                     (ii)   which is or becomes defined as a "hazardous waste"
          or "hazardous substance" under any federal, state or local statute,
          regulation or ordinance or amendments thereto including, without
          limitation, the Comprehensive Environmental Response, Compensation and
          Liability Act (42 U.S.C. Section 9601 et. seq.) and or the Resource
          Conservation and Recovery Act (42 U.S.C. Section 6901 et. seq.)

                     (iii)  which is toxic, explosive, corrosive, flammable,
          infectious, radioactive, carcinogenic, mutagenic or otherwise
          hazardous and is or becomes regulated by any governmental authority,
          agency, department, commission, board, agency or instrumentality of
          the United States, the State of California or any political
          subdivision thereof; or

                     (iv)   the presence of which on the Premises poses or
          threatens to pose a hazard to the health or safety of persons on or
          about the Premises; or

                      (v)   without limitation which contains gasoline, diesel
          fuel or other petroleum hydrocarbons; or

                      (vi)  without limitation which contains polychlorinated
          bipheynols (PCBs), or asbestos; or

                     (vii)  which is considered by any government
          authority to be harmful, dangerous, toxic, flammable or otherwise
          deserving of special care.

                (f)  Lessor shall indemnify, defend and hold harmless Lessee,
     Lessee's agents, employees, and lenders, from any and all claims, losses,
     liability, demands,

                                    - 10 -
<PAGE>

     damages, costs, offsets, lawsuits, judgments, award and expenses,
     including, but not limited to, attorneys' fees arising out of or in
     connection with any Hazardous Material in, on, about or under the Premises
     or the Office Building Project, to the extent that the presence of such
     Hazardous Materials was caused by Lessor or Lessor's Agents (defined
     below). Lessor shall comply with any requirements imposed by any
     governmental entity or agency with respect to Hazardous Materials in, on,
     under or about the Premises and/or the Office Building Project to the
     extent such presence was not caused by a breach of this Paragraph 5.4 by
     Lessee or Lessee's Agents. Lessor's obligations under this Paragraph 5.4
     shall survive the ending, termination, and cancellation of this Lease, and
     no termination, cancellation or release Agreement entered into by Lessor
     and Lessee shall release Lessor from Lessor's obligations under this
     Paragraph 5.4 unless any such Agreement expressly sets forth Lessee's
     intention to so release Lessor.

          6.    MAINTENANCE, REPAIRS, ALTERATIONS AND COMMON AREA SERVICES.
                ----------------------------------------------------------

          6.1   Lessor's Obligations.  Lessor shall keep the Office Building
                --------------------
     Project, including the Premises, interior and exterior walls, roof, and
     Common Areas, and the equipment whether used exclusively for the Premises
     or in common with other premises, in good condition and repair; provided,
     however, Lessor shall not be obligated to paint, repair or replace wall
     coverings, or to repair or replace any improvements that are not ordinarily
     a part of the Building or are above Building standards as of the
     Commencement Date of this Lease.  Lessor shall not be obligated to repair
     damage caused by negligence of Lessee or of Lessee's agents, employees,
     contractors, guests or invitees, or by reason of the failure of Lessee to
     perform or comply with any terms, conditions or covenants in this Lease, or
     caused by alterations, additions or improvements made by Lessee or Lessee's
     agents, employees or contractors, which damage Lessee shall repair at its
     sole expense.  Lessee expressly waives the benefits of any statute now or
     hereafter in effect (including, without limitation, the provisions of
     Sections 1941 and 1942 of the California Civil Code) which would otherwise
     afford Lessee the right to make repairs at Lessor's expense or to terminate
     this Lease because of Lessor's failure to keep the Premises, the Building
     or the Common Areas in good order, condition and repair.

          6.2   Lessee's Obligations.
                --------------------

                                    - 11 -
<PAGE>

                (a)  Notwithstanding Lessor's obligation to keep the Premises in
     good condition and repair, Lessee shall be responsible for payment to
     Lessor, as additional rent, that portion of the cost of any maintenance and
     repair of the Premises, or any equipment (wherever located), that serves
     only Lessee or the Premises, to the extent such cost is attributable to any
     cause beyond normal wear and tear or damage from casualty described in
     Paragraph 8.  Lessee shall be responsible for the actual cost of painting,
     repairing or replacing wall coverings, and to repair or replace any
     Premises Improvements that are not ordinarily a part of the Building or
     that are above Building standards as of the Commencement Date of this
     Lease.  Lessor may, at its option, upon reasonable notice, elect to have
     Lessee perform any particular such maintenance or repairs the cost of which
     is otherwise Lessee's responsibility hereunder.

                (b)  On the last day of the term hereof, or on any sooner
     termination, Lessee shall surrender the Premises to Lessor in the same
     condition as received, ordinary wear and tear and damage from casualty
     described in Paragraph 8,  excepted, clean and free of debris.  Any damage
     or deterioration of the Premises shall not be deemed ordinary wear and tear
     if the same could have been prevented by good maintenance practices by
     Lessee.  Lessee shall repair any damage to the Premises occasioned by the
     installation or removal of Lessee's trade fixtures, alterations,
     furnishings and equipment.  Except for such conditions resulting from
     normal wear and tear and damage from casualty, Lessee shall leave the air
     lines, power panels, electrical distribution systems, lighting fixtures,
     air conditioning, window coverings, ceilings and plumbing on the Premises
     clean and in good operating condition and shall leave the ceiling panels,
     air conditioning vents, painted surfaces, wall coverings, paneling and
     carpets clean and in good repair.

          6.3   Alterations and Additions.
                -------------------------

                (a)  Except for the initial Tenant Improvements and non-
     structural alterations which do not affect Building systems, Lessee shall
     not make any alterations, improvement, additions, Utility Installation or
     repair in, on or about the Premises, over Three Thousand Dollars ($3,000)
     without Lessor's prior written consent which shall not be unreasonably
     withheld, conditioned or delayed. As used in the Paragraph 6.3 the term
     "Utility Installation" shall mean carpeting, window and wallcoverings,
     power panels, electrical distribution

                                    - 12 -
<PAGE>

     systems, lighting fixtures, air conditioning and plumbing. At the
     expiration of the term, Lessor may require the removal of any or all of
     said alterations, improvements, additions or Utility Installations, and the
     restoration of the Premises to their prior condition, at Lessee's expense.
     Should Lessor permit Lessee to make its own alterations, improvements,
     additions or Utility Installations, Lessee shall use only such contractor
     as has been expressly approved by Lessor, which approval shall not be
     unreasonably withheld, and Lessor may require Lessee to provide Lessor, at
     Lessee's sole cost and expense, a lien and completion bond in an amount
     equal to one and one-half (1 1/2) times the estimated cost of such
     improvements, to insure Lessor against any liability for mechanic's and
     materialmen's liens and to insure completion of the work. Should Lessee
     make any alterations, improvements, additions or Utility Installations
     without the prior approval of Lessor, or use a contractor not expressly
     approved by Lessor, Lessor may, at any time during the term of this Lease,
     require that Lessee remove any part or all of the same.

                (b)  Except as provided in subsection (a) above, any
     alterations, improvements, additions or Utility Installations in or about
     the Premises over Three Thousand Dollars ($3,000) that Lessee shall desire
     to make shall be presented to Lessor in written form, with proposed
     detailed plans. If Lessor shall give its consent to Lessee's making such
     alteration, improvement, addition or Utility Installation, the consent
     shall be deemed conditioned upon Lessee acquiring a permit to do so from
     the applicable governmental agencies, furnishing a copy thereof to Lessor
     prior to the commencement of the work, and compliance by Lessee with all
     conditions of said permit in a prompt and expeditious manner.

                (c)  Lessee shall pay, when due, all claims for labor or
     materials furnished or alleged to have been furnished to or for Lessee at
     or for use in the Premises, which claims are or may be secured by any
     mechanic's or materialmen's lien against the Premises, the Building or the
     Office Building Project, or any interest therein.

                (d)  Lessee shall give Lessor not less than fifteen (15) days'
     notice prior to the commencement of any work in the Premises by Lessee, and
     Lessor shall have the right to post notices of non-responsibility in or on
     the Premises or the Building as provided by law.  If Lessee shall, in good
     faith, contest the validity of any such lien, claim or demand, then Lessee
     shall, at its sole expense defend itself and Lessor against the same and
     shall pay and satisfy any such adverse judgment that may

                                    - 13 -
<PAGE>

     be rendered thereon before the enforcement thereof against the Lessor or
     the Premises, the Building or the Office Building Project, upon the
     condition that if Lessor shall require, Lessee shall furnish to Lessor a
     surety bond satisfactory to Lessor in an amount equal to such contested
     lien claim or demand indemnifying Lessor against liability for the same and
     holding the Premises, the Building and the Office Building Project free
     from the effect of such lien or claim. In addition, Lessor may require
     Lessee to pay Lessor's reasonable attorneys' fees and costs in
     participating in such action if Lessor shall decide it is to Lessor's best
     interest to do so.

                (e)  All alterations, improvements, additions and Utility
     Installations (whether or not such Utility Installations constitute trade
     fixtures of Lessee), which may be made to the Premises by Lessee, including
     but not limited to, floor coverings, paneling, doors, drapes, built-ins,
     moldings, sound attenuation, and lighting, conduit, wiring and outlets,
     shall be made and done in a good and workmanlike manner and of good and
     sufficient quality and materials and shall be the property of Lessor and
     remain upon and be surrendered with the Premises at the expiration of the
     Lease term, unless Lessor requires their removal pursuant to Paragraph
     6.3(a). Provided Lessee is not in default, notwithstanding the provisions
     of this Paragraph 6.3(e), Lessee's personal property, trade fixtures,
     equipment, phone systems, security systems and wiring, and furniture shall
     remain the property of Lessee and may be removed by Lessee subject to the
     provisions of Paragraph 6.2(b). Lessee shall repair any material damage to
     the Premises or the Building caused by the removal of any such personal
     property, systems or equipment of Lessee.

                (f)  Lessee shall provide Lessor with as-built plans and
     specifications for any alterations, improvements, additions or Utility
     Installations.

          6.4   Utility Additions.
                -----------------

     Lessor reserves the right to install new or additional utility facilities
     throughout the Office Building Project for the benefit of Lessor or Lessee,
     or any other lessee of the Office Building Project, including, but not by
     way of limitation, such utilities as plumbing, electrical systems, security
     systems, communication systems, and fire protection and detection systems,
     so long as such installations do not unreasonably interfere with Lessee's
     use of the Premises and do not affect Lessee's rights, use or obligations
     hereunder.  A proportional share of the amortized cost of such additions
     including interest shall be charged to the Lessee.

                                     - 14 -
<PAGE>

          7.    INSURANCE; INDEMNITY.
                --------------------

          7.1   Liability Insurance - Lessee.   Lessee shall, at Lessee's
                ----------------------------
     expense, obtain and keep in force during the term of this Lease a policy of
     Comprehensive General Liability insurance utilizing an Insurance Services
     Office standard form with Broad Form General Liability Endorsement
     (GL0404), or equivalent, in an amount of not less than Two Million Dollars
     ($2,000,000) per occurrence of bodily injury and property damage combined
     or in a greater amount as reasonably determined by Lessor as the amount
     then customarily carried by owners and operators of similar properties and
     shall insure Lessee, and Lessor as an additional insured, against liability
     arising out of the use, occupancy or maintenance of the Premises.
     Compliance with the above requirement shall not, however, limit the
     liability of Lessee hereunder.

          7.2   Property Insurance - Lessee. Lessee shall, at Lessee's
                ---------------------------
     expense, obtain and keep in force during the term of this Lease for the
     benefit of Lessee, replacement cost of fire and extended coverage
     insurance, with vandalism and malicious mischief endorsements, in an amount
     sufficient to cover not less than 100% of the full replacement cost, as the
     same may exist from time to time, of all of Lessee's personal property,
     fixtures, equipment and tenant improvements financed by Lessee.

          7.3   Insurance - Lessor.  Lessor shall obtain and keep in force
                ------------------
     during the term of this Lease a policy or policies of insurance covering
     loss or damage to the Office Building Project improvements, but not
     Lessee's personal property, fixtures, equipment or tenant improvements in
     the amount of the full replacement cost thereof, as the same may exist from
     time to time, utilizing Insurance Services Office standard form, or such
     other form as Lessor elects, providing protection against all perils
     included within the classification of special causes of loss, and such
     other perils as Lessor deems advisable, including without limitation
     earthquake and flood coverage.  In addition, Lessor shall, at Lessor's
     option, obtain and keep in force, during the term of this Lease, a policy
     of rental value insurance covering a period of one year, with loss payable
     to Lessor, which insurance shall also cover all Operating Expenses for said
     period.  Lessee will not be named in any such policies carried by Lessor
     and shall have no right to any proceeds therefrom.  The policies required
     by this Paragraph 7.3 shall contain such deductibles as Lessor or the
     aforesaid lender may determine.  In the event that the Premises shall
     suffer an insured loss as defined in Paragraph

                                    - 15 -
<PAGE>

     8.1(e) hereof, the deductible amounts under the applicable insurance
     policies shall be deemed an Operating Expense. Lessee shall not do or
     permit to be done anything which shall invalidate the insurance policies
     carried by Lessor. Lessee shall pay the entirety of any increase in the
     property insurance premium for the Office Building Project over what it was
     immediately prior to the commencement of the term of this Lease if the
     increase is specified by Lessor's insurance carrier as being caused by the
     nature of Lessee's occupancy or any act or omission of Lessee.

          7.4   Insurance Policies.  Lessee shall deliver to Lessor copies of
                ------------------
     all insurance policies required to be maintained by Lessee under this
     section 8 or certificates evidencing the existence and amounts of such
     insurance within thirty (30) business days after the Commencement Date of
     this Lease.  All such policies shall name Lessor as an additional insured
     and no such policy shall be cancelable or subject to reduction of coverage
     or other modification except after thirty (30) days prior written notice to
     Lessor.  Lessee shall, at least thirty (30) days prior to the expiration of
     such policies, furnish Lessor with renewals thereof.

          7.5   Waiver of Subrogation.  Notwithstanding anything to the contrary
                ---------------------
     in the Lease.  Lessee and Lessor each hereby release and relieve the other,
     and waive their entire right of recovery against the other, for direct or
     consequential loss or damage arising out of or incident to the perils
     covered by property insurance carried by such party, without regard to the
     negligence of Lessor or Lessee or their agents, employees, contractors
     and/or invitees.  All of Lessor's and Lessee's repair and indemnity
     obligations under the Lease shall be subject to the waiver contained in
     this paragraph.  Each party shall cause each insurance policy it obtains to
     provide that the insurer thereunder waives all right of recovery by way of
     subrogation as required herein in connection with any injury or damage
     covered by the policy.

          7.6.  Indemnity.  Except to the extent and proportion caused by
                ---------
     Lessor's or its agent's or contractor's negligence or willful misconduct,
     Lessee shall indemnify and hold harmless Lessor and its agents, partners
     and lenders, from and against any and all liability, cost, expense, loss or
     claim for damage to the person or property of anyone or any entity arising
     from Lessee's use of the Office Building Project, or from the conduct of
     Lessee's business or from any activity, work or things done or permitted by
     Lessee in or about the Premises and shall further indemnify and hold
     harmless Lessor from and against any and all liability, cost, expense, loss
     or

                                    - 16 -
<PAGE>

     claim arising from any breach or default in the performance of any
     obligation on Lessee's part to be performed under the terms of this Lease,
     or arising from any negligent act or omission of Lessee, or any of Lessee's
     agents, contractors, employees or invitees and from and against all costs,
     attorneys' fees, expenses and liabilities incurred by Lessor as the result
     of any such use, conduct, activity, work, things done or permitted, breach,
     default or negligence, and in dealing reasonably therewith, including but
     not limited to the defense or pursuit of any claim or any action or
     proceeding be brought against Lessor by reason of any such matter, Lessee
     upon notice from Lessor shall defend the same at Lessee's expense by
     counsel reasonably satisfactory to Lessor and Lessor shall cooperate with
     Lessee in such defense. Lessor need not have first paid any such liability
     cost, expense, loss or claim in order to be so indemnified. Lessee, as a
     material part of the consideration to Lessor, hereby assumes all risk of
     injury or damage to property of Lessee and its agents in, upon or about the
     Premises arising from any cause except for the negligence or willful
     misconduct of Lessor and Lessee hereby waives all claims in respect thereof
     against Lessor. Notwithstanding any provision to the contrary in this
     Lease, Lessor shall indemnify and hold harmless Lessee from all damages,
     liabilities, claims, judgments, actions, attorneys' fees, consultants'
     fees, costs and expenses arising from the negligence or willful misconduct
     of Lessor or Lessor's Agents or Contractors, or the breach of Lessor's
     obligations or representations under this Lease.

          7.7   Exemption of Lessor from Liability.  Lessee hereby agrees that,
                ----------------------------------
     except for the negligence or willful misconduct of Lessor, Lessor's Agents
     or Contractors, Lessor shall not be liable for injury to Lessee's business
     or any loss of income therefrom or from loss of or damage to the goods,
     wares, merchandise or other property of Lessee, Lessee's employees,
     invitees, customers, or any other person in or about the Premises or the
     Office Building Project, nor shall Lessor be liable for injury to the
     person of Lessee, Lessee's employees, agents or contractors, whether such
     damage or injury is caused by or results from thefts, fire, steam,
     electricity, gas, water or rain, or from the breakage, leakage, obstruction
     or other defects of pipes, sprinklers, wires, appliances, plumbing, air
     conditioning or lighting fixtures, or from any other cause, whether said
     damage or injury results from conditions arising upon the Premises or upon
     other portions of the Office

                                    - 17 -
<PAGE>

     Building Project, or from other sources or places, or from new construction
     or the repair, alteration or improvement of any part of the Office Building
     Project, or of the equipment, fixtures or appurtenances applicable thereto,
     and regardless of whether the cause of such damage or injury or the means
     of repairing the same is inaccessible. In addition, Lessor shall not be
     liable for any damages arising from any act or neglect of any other lessee,
     occupant or user of the Office Building Project, nor from the failure of
     Lessor to enforce the provisions of any other lease.

          7.8   No Representation of Adequate Coverage.  Lessor makes no
                --------------------------------------
     representation that the limits or forms of insurance specified in this
     Section 7 are adequate to cover Lessee's property or obligations under this
     Lease.

          8.    DAMAGE OR DESTRUCTION.
                ---------------------

          8.1   Definitions.
                -----------

                (a)  "Premises Damage" shall mean if the Premises are damaged or
     destroyed to any extent.

                (b)  "Premises Partial Damage" shall mean if the Premises are
     damaged or destroyed to the extent that the cost of repair is less than
     thirty-three and one-third percent (33-1/3%) of the then Replacement Cost
     of the Building.

                (c)  "Premises Total Destruction" shall mean if the Premises are
     damaged or destroyed to the extent that the cost to repair is thirty-three
     and one-third percent (33-1/3%) or more of the then Replacement Cost of the
     Building.

                (d)  "Building Total Destruction" shall mean if the Building is
     damaged or destroyed to the extent that the cost of repair is thirty-three
     and one-third percent (33-1/3%) or more of the then Replacement Cost of the
     Building.

                (e)  "Insured Loss" shall mean damage or destruction which was
     caused by an event required to be covered by the insurance described in
     section 8.  The fact that an insured Loss has a deductible amount shall not
     make the loss an uninsured loss.

                (f)  "Replacement Cost" shall mean the amount of money necessary
     to be spent in order to repair or rebuild the damaged area to the condition
     that existed immediately prior to the damage occurring, excluding all
     improvements made by lessees, other than those installed by Lessor at
     Lessee's expense.

                                    - 18 -
<PAGE>

          8.2   Premises Damage; Premises Partial Damage.
                ----------------------------------------

                (a)  Insured Loss:  Subject to the provisions of Paragraphs 8.4
                     ------------
     and 8.5, if at any time during the term of this Lease there is damage which
     is an Insured Loss and which falls into the classification of either
     Premises Damage or Premises Partial Damage, then Lessor shall, as soon as
     reasonably possible and to the extent the required materials and labor are
     readily available through usual commercial channels, at Lessor's expense,
     repair such damage (but not Lessee's fixtures, equipment or tenant
     improvements originally paid for by Lessee) to its condition existing at
     the time of the damage, and this Lease shall continue in full force and
     effect.  In the event any such damage is caused by the negligent or willful
     act of Lessee, Lessee shall make the repairs at Lessee's expense.

                (b)  Uninsured Loss:  Subject to the provisions of Paragraphs
                     --------------
     8.4 and 8.5, if at any time during the term of this Lease there is damage
     which is not an Insured Loss and which falls within the classification of
     Premises Damage or Premises Building Partial Damage, unless caused by a
     negligent or willful act of Lessee (in which event Lessee shall make the
     repairs at Lessee's expense), Lessor may at Lessor's option either (i)
     repair such damage as soon as reasonably possible at Lessor's expense, in
     which event this Lease shall continue in full force and effect, or (ii)
     give written notice to Lessee within thirty (30) days after the date of the
     occurrence of such damage of Lessor's intention to cancel and terminate
     this Lease as of the date of the occurrence of such damage, in which event
     this Lease shall terminate as of the date of the occurrence of such damage.
     However, Lessor shall not have the right to terminate the Lease if damage
     to or destruction of the Premises or Building is relatively minor (e.g.,
     repair or restoration would cost less than five percent (5%) of the
     replacement cost of the Building).

          8.3   Premises Total Destruction; Office Building Project Total
                ---------------------------------------------------------
     Destruction.  Subject to the provisions of Paragraphs 8.4 and 8.5, if at
     -----------
     any time during the term of this Lease there is damage, whether or not it
     is an Insured Loss, which falls into the classifications of either (i)
     Premises Total Destruction, or (ii) Office Building Project Total
     Destruction, then Lessor may at Lessor's option either (i)repair such
     damage or destruction within one hundred twenty (120) days at Lessor's
     expense to its condition existing at the time of the damage, but not
     Lessee's fixtures, equipment or tenant

                                    - 19 -
<PAGE>

     improvements, and this Lease shall continue in full force and effect, or
     (ii) give written notice to Lessee within thirty (30) days after the date
     of occurrence of such damage of Lessor's intention to cancel and terminate
     this Lease, in which case this Lease shall terminate as of the date of the
     occurrence of such damage.

          8.4   Damage Near End of Term.  If at any time during the last twelve
                -----------------------
     (12) months of the term of this Lease including extensions there is
     substantial damage to the Premises, Lessor may at Lessor's option cancel
     and terminate this Lease as of the date of occurrence of such damage by
     giving written notice to Lessee of Lessor's election to do so within thirty
     (30) days after the date of occurrence of such damage.

          8.5   Abatement of Rent; Lessee's Remedies.
                ------------------------------------

                (a)  In the event Lessor repairs or restores the Building or
     Premises pursuant to the provisions of this Section 8, and any part of the
     Premises are not usable in the same manner as before the damage (including
     loss of use due to loss of access or essential services), the rent payable
     hereunder (including Lessee's Share of Operating Expenses) for the period
     during which such damage, repair or restoration continues shall be abated,
     provided (1) the damage was not the result of the negligence of Lessee, and
     (2) such abatement shall be in proportion to that part of the Premises
     which is unusable by Lessee for the conduct of its business in the same
     manner as before the damage.  Except for said abatement of rent, if any,
     Lessee shall have no claim against Lessor for any damage suffered by reason
     of any such damage, destruction, repair or restoration.

                (b)  If Lessor shall be obligated to repair or restore the
     Premises or the Building under the provisions of this Section 8 and shall
     not commence such repair or restoration within ninety (90) days after such
     occurrence or if it shall require more than one hundred twenty (120) days
     from the date of such casualty to complete restoration or repair, Lessee
     may at Lessee's option cancel and terminate this Lease by giving Lessor
     written notice of Lessee's election to do so at any time prior to the
     commencement or completion, respectively, of such repair or restoration.
     In such event this Lease shall terminate as of the date of such notice.

                (c)  Lessee agrees to cooperate with Lessor in connection with
     any such restoration and repair, including but not limited to the approval
     and/or execution of plans and specifications as and when required.

                                    - 20 -
<PAGE>

          8.6   Termination - Advance Payments.  Upon termination of this Lease
                ------------------------------
     pursuant to this Section 8, an equitable adjustment shall be made
     concerning advance rent, if any, and any advance payments made by Lessee to
     Lessor.  Lessor shall, in addition return to Lessee so much of Lessee's
     security deposit as has not theretofore been applied by Lessor or which
     Lessor has a right to apply pursuant to the terms of this Lease.

          8.7   Waiver.  Lessor and Lessee waive the provisions of any statutes
                ------
     which relate to termination of leases when leased property is destroyed and
     agree that such event shall be governed by the terms of this Lease.

          9.    REAL PROPERTY TAXES.
                -------------------

          9.1   Payment of Taxes.  Lessor shall pay the real property tax, as
                ----------------
     defined in Paragraph 9.3, applicable to the Office Building Project subject
     to the payment by Lessee of Lessee's Share of Operating Expenses in
     accordance with the provisions of Paragraph 4.2, except as otherwise
     provided in Paragraph 9.2.

          9.2   Additional Improvements.  Lessee shall not be responsible for
                -----------------------
     paying any increase in real property tax specified in the tax assessor's
     records and work sheets as being caused by additional improvements placed
     upon the Office Building Project by other lessees or by Lessor for the
     exclusive enjoyment of any other lessee.  Notwithstanding the provisions
     set forth in Paragraph 4.2 hereof, Lessee shall, however, pay to Lessor at
     the time that Operating Expenses are payable under Paragraph 4.2(d) the
     entirety of any increase in real property taxes if assessed solely by
     reason of additional improvements placed upon the Premises by Lessee at
     Lessee's request.

          9.3   Definition of "Real Property Tax".   As used herein, the term
                ---------------------------------
     "real property tax" shall include any form of real estate tax or
     assessment, general, special, ordinary or extraordinary, and any license
     fee, commercial rental tax, improvement bond or bonds, levy or tax (other
     than inheritance, personal income or estate taxes) imposed on the Office
     Building Project or any portion thereof by any authority having the direct
     or indirect power to tax, including any city, county, state or federal
     government, or any school, agricultural, sanitary, fire, street, drainage
     or other improvement district thereof, as against any legal or equitable
     interest of Lessor in the Office Building Project or in any portion
     thereof, as against

                                    - 21 -
<PAGE>

     Lessor's right to rent or other income therefrom, and as against Lessor's
     business of leasing the Office Building Project.

     Notwithstanding the foregoing, "Real Property Tax" shall not include and
     Lessee shall not be required to pay any portion of any tax or assessment
     expense or any increase therein (a) levied on Lessor's rental income,
     unless such tax or assessment expense is imposed in lieu of real property
     taxes; (b) in excess of amount which would be payable if such tax or
     assessment expense were paid in installments over the longest possible
     term; or (c) attributable to Lessor's net income, inheritance, gift,
     transfer, estate or state taxes; or (d) resulting from a change of
     ownership or transfer of any or all of the Project or the improvement of
     any of the Project for sole use of other occupants.

          9.4   Joint Assessment.  If the improvements or property, the taxes
                ----------------
     for which are to be paid separately by Lessee under Paragraph 9.2 or 9.5,
     are not separately assessed, Lessee's portion of that tax shall be
     equitably determined by Lessor from the respective valuations assigned in
     the assessor's work sheets or such other information (which may include the
     cost of construction) as may be reasonably available.  Lessor's reasonable
     determination thereof, in good faith, shall be conclusive.

          9.5   Personal Property Taxes.
                -----------------------

                (a)  Lessee shall pay prior to delinquency all taxes assessed
     against and levied upon trade fixtures, furnishings, equipment and all
     other personal property of Lessee contained in the Premises or elsewhere.

                (b)  If any of Lessee's said personal property shall be assessed
     with Lessor's real property, Lessee shall pay to Lessor the taxes
     attributable to Lessee within ten (10) days after receipt of a written
     statement setting forth the taxes applicable to Lessee's property.

          10.   UTILITIES AND SERVICES.
                ----------------------

          10.1  Services Provided by Lessor.  Lessor shall provide typical
                ---------------------------
     office heating, ventilating and air conditioning (HVAC) throughout the
     building from four (4) large house units (AC 1/DF 1, AC 2/DF 2, AC 3/DF 3,
     AC 4/ DF 4) during the specified hours of service in Paragraph 10.3.  Any
     other Fan Coils (FC), Condensing Units (CU), air conditioning units, and/or
     fans required for computer rooms, clean air rooms, laboratories, etc. that
     require special temperature control, odor control, etc., will

                                    - 22 -
<PAGE>

     result in additional charge to Lessee to cover the costs of the special
     system or systems including electricity, gas, water, maintenance and repair
     costs, and amortization plus interest charged according to generally
     accepted accounting practices. Lessor shall also provide electricity and
     water twenty-four (24) hours per day, seven days per week.

          10.2  Services Exclusive to Lessee.  Lessee shall pay for all water,
                ----------------------------
     heating, ventilation, air conditioning, light, power, telephone, data and
     other utilities and services specially or exclusively supplied and/or
     metered exclusively to the Premises or to Lessee, together with any taxes
     thereon.  If any such services are not separately metered to the Premises,
     Lessee shall pay at Lessor's option, either Lessee's Share or a reasonable
     proportion to be determined by Lessor of all charges jointly metered with
     other premises in the Building.

          10.3  Hours of Service.  The services and utilities described in
                ----------------
     Paragraph 10.1 shall be provided during generally accepted business days,
     Monday through Friday, hours 7:00 a.m. through 6:00 p.m.  Utilities and
     services required at all other times shall be subject to reimbursement by
     Lessee to Lessor of the actual cost thereof including allowances for
     additional wear, and reduction in expected life of the equipment.

          10.4  Excess Usage by Lessee.  Lessee shall not make connection to the
                ----------------------
     utilities except by or through existing outlets and shall not install or
     use machinery or equipment in or about the Premises that uses excess water,
     lighting, or power, or suffer or permit any act that causes extra burden
     upon the utilities or services, including but not limited to security
     services, over standard office usage for the Office Building Property.
     Lessor shall require Lessee to reimburse Lessor for any excess expenses or
     costs that may arise out of a breach of this subparagraph by Lessee.
     Lessor may in its reasonable discretion, install at Lessee's expense
     supplemental equipment and/or separate metering applicable to Lessee's
     excess usage or loading.

          10.5  Interruptions.  There shall be no abatement of rent and Lessor
                -------------
     shall not be liable in any respect whatsoever for the inadequacy, stoppage,
     interruption or discontinuance of any utility or service due to riot,
     strike, labor dispute, breakdown, accident, repair or other cause beyond
     Lessor's reasonable control or in cooperation with governmental request or
     directions.

                                    - 23 -
<PAGE>

          11.   OPTION TO EXTEND.  Lessor hereby grants to Lessee two (2)
                ----------------
options (the "Option") to extend the term of this lease for two additional terms
of one (1) year, commencing when the initial term expires, upon the terms and
conditions set forth in this Paragraph. Provided "Resonate" or Lessee Affiliate
is then occupying at least fifty percent (50%) of the Premises, Lessee may
exercise such option by giving Lessor written notice of its intention not less
than one hundred eighty (180) days prior to the expiration of the initial term
of this Lease. With respect to the second one year term, Lessee may exercise
such option by giving Lessor written notice of its intention not less than one
hundred eighty (180) days prior to the expiration of the first additional one
year term. All of the term and conditions contained in the Lease, as the same
may be amended from time to time by the parties in accordance with the
provisions of the Lease, shall remain in full force and effect and shall apply
during the Option term except the rent shall be the greater of 100% Fair Market
Rate or the previous 12 months rent.

          12.   ASSIGNMENT AND SUBLETTING.
                -------------------------

          12.1  Lessor's Consent Required.  Lessee shall not voluntarily or by
                -------------------------
     operation of law sublet, or otherwise transfer or encumber any part of
     Lessee's interest in the Lease or in the Premises, without Lessor's prior
     written consent, which Lessor shall not unreasonably withhold, and
     Sublessee must have a net worth of at least ten million dollars
     ($10,000,000).  If Lessor does not notify Lessee in writing of its consent
     or reasonable nonconsent of such sublet, transfer or encumberance proposed
     by Lessee within twenty (20) days following Lessee's request for approval,
     then Lessor shall be deemed to have consented to such sublet, transfer or
     encumberance.  Any attempted assignment, transfer, mortgage, encumbrance or
     subletting without such consent shall be void and shall constitute a
     material default and breach of this Lease without the need for notice to
     Lessee under Paragraph 13.1.  If Lessee desires to transfer over fifty
     percent (50%) of the space, the Lessor reserves the right to terminate the
     Lease.

     "Transfer" within the meaning of this Section 12 shall include the transfer
     or transfers aggregating, if Lessee is a partnership, more than fifty
     percent (50%) of the profit and loss participation in such partnership.

          12.2  Lessee Affiliate.  Notwithstanding the provisions of Paragraph
                ----------------
     12.1 hereof, Lessee may assign or sublet the Premises, or any portion
     thereof, without Lessor's consent, to any corporation which controls, is
     controlled by or is under common control with Lessee, or

                                    - 24 -
<PAGE>

     to any corporation resulting from the merger or consolidation with Lessee,
     or to any person or entity which acquires all the assets of Lessee as a
     going concern of the business that is being conducted on the Premises, all
     of which are referred to as "Lessee Affiliate"; provided that before such
     assignment shall be effective, (a) said assignee shall assume, in full, the
     obligations of Lessee under this Lease and (b) Lessor shall be given
     written notice of such assignment and assumption. Any such assignment shall
     not, in any way, affect or limit the liability of Lessee under the terms of
     this Lease even if after such assignment or subletting the terms of this
     Lease are materially changed or altered without the consent of Lessee, the
     consent of whom shall not be necessary.

          12.3  Terms and Conditions Applicable to Assignment and Subletting.
                ------------------------------------------------------------

                (a)  Regardless of Lessor's consent, no assignment or subletting
     shall release Lessee of Lessee's obligations hereunder or alter the primary
     liability of Lessee to pay the rent and other sums due Lessor hereunder
     including Lessee's Share of Operating Expenses, and to perform all other
     obligations to be performed by Lessee hereunder.

                (b)  Lessor may accept rent from any person other than Lessee
     pending approval or disapproval of such assignment.

                (c)  Neither a reasonable delay in the approval or disapproval
     of such assignment or subletting, nor the acceptance of rent, shall
     constitute a waiver or estoppel of Lessor's right to exercise its remedies
     for the breach of any of the terms or conditions of this Section 14 or this
     Lease.

                (d)  If Lessee's obligations under this Lease have been
     guaranteed by third parties, then an assignment or sublease, and Lessor's
     consent thereto, shall not be effective unless said guarantors give their
     written consent to such assignment or sublease and the terms thereof.

                (e)  The consent of Lessor to any assignment or subletting shall
     not constitute a consent to any subsequent assignment or subletting by
     Lessee or to any subsequent or successive assignment or subletting by the
     sublessee.  However, Lessor may consent to subsequent sublettings and
     assignments of the sublease or any amendments or modifications thereto
     without notifying

                                    - 25 -
<PAGE>

     Lessee or anyone else liable on the Lease or sublease and without obtaining
     their consent and such action shall not relieve such persons from liability
     under this Lease or said sublease; provided, however, such persons shall
     not be responsible to the extent any such amendment or modification
     enlarges or increases the obligations of the Lessee or sublessee under this
     Lease or such sublease.

                (f)  In the event of any default under this Lease, Lessor may
     proceed directly against Lessee, any guarantors or anyone else responsible
     for the performance of this Lease, including the sublessee, without first
     exhausting Lessor's remedies against any other person or entity responsible
     therefor to Lessor, or any security held by Lessor or Lessee.

                (g)  Lessor's written consent to any assignment or subletting of
     the Premises by Lessee shall not constitute an acknowledgment that no
     default then exists under this Lease of the obligations to be performed by
     Lessee nor shall such consent be deemed a waiver of any then existing
     default, except as may be otherwise stated by Lessor at the time.

                (h)  The discovery of the fact that any financial statement
     relied upon by Lessor in giving its consent to an assignment or subletting
     was materially false shall, at Lessor's election, render Lessor's said
     consent null and void.

                (i)  If Lessee receives rent or other consideration, either
     initially or over the term of any assignment or sublease in excess of the
     rent required under this Lease, Lessee shall pay to Lessor, as additional
     rent hereunder, 50% of the excess of each such payment of rent or
     additional consideration by Lessee after subtracting Lessee's reasonable
     brokers and attorney's fees and the unamortized portion of improvements to
     the Premises paid for by Lessee, provided that in no event will Lessor be
     responsible for any portion of the broker and attorney fees associated with
     such sublease or assignment.

          12.4  Additional Terms and Conditions Applicable to Subletting.
                --------------------------------------------------------
     Regardless of Lessor's consent, the following terms and conditions shall
     apply to any subletting by Lessee of all or any part of the Premises and
     shall be deemed included in all subleases under this Lease whether or not
     expressly incorporated therein:

                (a)  Lessee hereby assigns and transfers to Lessor all of
     Lessee's interest in all rentals and income

                                    - 26 -
<PAGE>

     arising from any sublease heretofore or hereafter made by Lessee, and
     Lessor may collect such rent and income and apply same toward Lessee's
     obligations under this Lease, provided, however, that until a default shall
     occur in the performance of Lessee's obligations under this Lease, Lessee
     may receive, collect and enjoy the rents accruing under such sublease.
     Lessor shall not, by reasons of this or any other assignment of such
     sublease to Lessor nor by reason of the collection of the rents from a
     sublessee be deemed liable to the sublessee for any failure of Lessee to
     perform and comply with any of Lessee's obligations to such sublessee under
     such sublease. Lessee hereby irrevocably authorizes and directs any such
     sublessee, upon receipt of a written notice from Lessor stating that a
     default in the performance of Lessee's obligations under this Lease, to pay
     to Lessor the rents due and to become due under the sublease. Lessee agrees
     that such sublessee shall have the right to rely upon any such statement
     and request from Lessor, and that such sublessee shall pay such rents to
     Lessor without any obligation or right to inquire as to whether such
     default exists and notwithstanding any notice from or claim from Lessee to
     the contrary. Lessee shall have no right or claim against said sublessee or
     Lessor for any such rents so paid by said sublessee to Lessor.

                (b)  No sublease entered into by Lessee shall be effective
     unless and until it has been approved in writing by Lessor. In entering
     into any sublease, Lessee shall use only such form of sublease as is
     satisfactory to Lessor, and once approved by Lessor, such sublease shall
     not be changed or modified without Lessor's prior written consent which
     consent shall not be unreasonably withheld or delayed. Any sublessee shall,
     by reason of entering into a sublease under this Lease, be deemed for the
     benefit of Lessor, to have assumed and agreed to conform and comply with
     each and every obligation herein to be performed by Lessee other than such
     obligations as are contrary to or inconsistent with provisions contained in
     a sublease to which Lessor has expressly consented in writing.

                (c)  In the event Lessee shall default in the performance of its
     obligations under this Lease, Lessor, at its option and without any
     obligation to do so, may require any sublessee to attorney to Lessor, in
     which event Lessor shall undertake the obligations of Lessee under such
     sublease from the time of the exercise of said option to the termination of
     such sublease; provided, however, Lessor shall not be liable for any
     prepaid rents or security deposit paid by such sublessee to Lessee or

                                    - 27 -
<PAGE>

     for any other prior defaults of Lessee under such sublease.

                (d)  No sublessee shall further assign or sublet all or any part
     of the Premises without Lessor's prior written consent in accordance with
     the Lease.

                (e)  With respect to any subletting to which Lessor has
     consented, Lessor agrees to deliver a copy of any notice of default by
     Lessee to the sublessee.  Such sublessee shall have the right to cure a
     default of Lessee within three (3) days after service of said notice of
     default upon such sublessee, and the sublessee shall have the right of
     reimbursement and offset from and against Lessee for any such defaults
     cured by the sublessee.

          12.5  Lessor's Expenses.  In the event Lessee shall assign or sublet
                -----------------
     the Premises or request the consent of Lessor to any assignment or
     subletting or if Lessee shall request the consent of Lessor for any act
     Lessee proposes to do then Lessee shall pay Lessor's reasonable costs and
     expenses incurred in connection therewith, including attorneys',
     architects', engineers' or other consultants' fees.

          12.6  Conditions to Consent.  Lessor reserves the right to condition
                ---------------------
     any approval to assign or sublet upon Lessor's determination that (a) the
     proposed assignee or sublessee shall conduct a business on the Premises of
     a quality substantially equal to that of Lessee and consistent with the
     general character of the other occupants of the Office Building Project and
     not in violation of any exclusives or rights then held by other tenants,
     and (b) the proposed assignee or sublessee be at least as financially
     responsible as the other tenants in the Building.

          13.   DEFAULT; REMEDIES.
                -----------------

          13.1  Default.  The occurrence of any one or more of the following
                -------
     events shall constitute a material default of this Lease by Lessee:

                (a)  The abandonment of the Premises by Lessee.  Abandonment of
     the Premises shall include the failure to occupy the Premises for a
     continuous period of sixty (60) days or more, whether or not the rent is
     paid.

                (b)  The failure by Lessee to make any payment of rent or any
     other payment required to be made by Lessee hereunder, as and when due,
     where such failure shall

                                    - 28 -
<PAGE>

     continue for a period of three (3) business days after written notice
     thereof from Lessor to Lessee. In the event that Lessor serves Lessee with
     a Notice to Pay Rent or Quit pursuant to applicable Unlawful Detainer
     statutes such Notice to Pay Rent or Quit shall also constitute the notice
     required by this subparagraph.

                (c)  (i) The making by Lessee of any general arrangement or
     general assignment for the benefit of creditors; (ii) Lessee becoming a
     "debtor" as defined in 11 U.S.C. (S) 101 or any successor statute thereto
     (unless, in the case of a petition filed against Lessee, the same is
     dismissed within sixty (60) days); (iii) the appointment of a trustee or
     receiver to take possession of substantially all of Lessee's assets located
     at the Premises or of Lessee's interest in this Lease, where such seizure
     is not discharged within thirty (30) days.  In the event that any provision
     of this Paragraph 13.1(c) is contrary to any applicable law, such provision
     shall be of no force or effect.

                (d)  The discovery by Lessor that any financial statement given
     to Lessor by Lessee, or its successor in interest or by any guarantor of
     Lessee's obligation hereunder, was materially false.

                (e)  The failure by Lessee to observe or perform any of the
     covenants, conditions or provisions of this Lease to be observed or
     performed by Lessee, other than those specifically referenced in other
     subparagraphs of this Paragraph 13.1, where such failure shall continue for
     a period of thirty (30) days after written notice thereof from Lessor to
     Lessee; provided, however, that if the nature of Lessee's noncompliance is
     such that more than thirty (30) days are reasonably required for its cure,
     then Lessee shall not be deemed to be in default if Lessee commenced such
     cure within said thirty (30) day period and thereafter diligently pursues
     such cure to completion.  To the extent permitted by law, such thirty (30)
     day notice shall constitute the sole and exclusive notice required to be
     given to Lessee under applicable Unlawful Detainer statutes.  In the event
     a specific time period for performance is set forth in any covenant,
     condition or provision of this Lease, such specific time period shall
     govern such performance rather than the thirty (30) day period set forth in
     this section and such specific time period shall not be subject to
     extension as provided in this section.

          13.2  Remedies.  In the event of any material default or breach of
                --------
     this Lease by Lessee, Lessor may at any time thereafter, with or without
     notice or demand and without

                                    - 29 -
<PAGE>

     limiting Lessor in the exercise of any right or remedy which Lessor may
     have by reason of such default:

                (a)  Terminate Lessee's right to possession of the Premises by
     any lawful means, in which case this Lease and the term hereof shall
     terminate and Lessee shall immediately surrender possession of the Premises
     to Lessor.  In such event Lessor shall be entitled to recover from Lessee
     all damages incurred by Lessor by reason of Lessee's default including, but
     not limited to, the cost of recovering possession of the Premises; expenses
     of reletting, including reasonably necessary renovation and alteration of
     the Premises, reasonable attorneys' fees, and any real estate commission
     actually paid; the worth at the time of award by the court having
     jurisdiction thereof of the amount by which the unpaid rent for the balance
     of the term after the time of such award exceeds the amount of such rental
     loss for the same period that Lessee proves could be reasonably avoided;
     that portion of the leasing commission paid by Lessor pursuant to Paragraph
     15 applicable to the unexpired term of this Lease.  Lessor shall use its
     best efforts to mitigate any damages caused by any such default.

                (b)  Maintain Lessee's right to possession, in which case this
     Lease shall continue in effect whether or not Lessee shall have vacated or
     abandoned the Premises.  In such event Lessor shall be entitled to enforce
     all of Lessor's rights and remedies under this Lease, including the right
     to recover the rent as it becomes due hereunder.

                (c)  Pursue any other remedy now or hereafter available to
     Lessor under the laws or judicial decisions of the state wherein the
     Premises are located. Unpaid installments of rent and other unpaid monetary
     obligations of Lessee under the terms of this Lease shall bear interest
     from the date due at the maximum rate then allowable by law.

                (d)  Lessor and Lessee agree that if an attorney is consulted by
     Lessor in connection with a Lessee Default, $500 is a reasonable minimum
     sum per such occurrence for legal services and costs in the preparation and
     service of a notice of Default and that Lessor may include the greater of
     $500 or the actual cost of such services and costs in said notice as rent
     due and payable to cure said Default.

          13.3  Default by Lessor.  Lessor shall not be in default unless Lessor
                -----------------
     fails to perform obligations required of Lessor within a reasonable time,
     but in no event later than thirty (30) days after written notice by

                                    - 30 -
<PAGE>

     Lessee to Lessor specifying wherein Lessor has failed to perform such
     obligation; provided, however, that if the nature of Lessor's obligation is
     such that more than thirty (30) days are required for performance then
     Lessor shall not be in default if Lessor commences performance within such
     thirty (30)-day period and thereafter diligently pursues the same to
     completion.

          13.4  Late Charges.  Lessee hereby acknowledges that late payment by
                ------------
     Lessee to Lessor of Base Rent, Lessee's Share of Operating Expenses or
     other sums due hereunder will cause Lessor to incur costs not contemplated
     by this Lease, the exact amount of which will be extremely difficult to
     ascertain.  Such costs include, but are not limited to, processing and
     accounting charges, and late charges which may be imposed on Lessor by the
     terms of any mortgage or trust deed covering the Office Building Project.
     Accordingly, if any installment of Base Rent, Operating Expenses, or any
     other sum due from Lessee shall not be received by Lessor or Lessor's
     designee within ten (10) days after such amount shall be due, then, without
     any requirement for notice to Lessee, Lessee shall pay to Lessor a late
     charge equal to five percent (5%) of such overdue amount.  The parties
     hereby agree that such late charge represents a fair and reasonable
     estimate of the costs Lessor will incur by reason of late payment by
     Lessee.  Acceptance of such late charge by Lessor shall in no event
     constitute a waiver of Lessee's default with respect to such overdue
     amount, nor prevent Lessor from exercising any of the other rights and
     remedies granted hereunder.

          14.   CONDEMNATION.  If the Premises or any portion thereof or the
                ------------
Office Building Project are taken under the power of eminent domain, or sold
under the threat of the exercise of said power (all of which are herein called
"condemnation"), this Lease shall terminate as to the part so taken as of the
date the condemning authority takes title or possession, whichever first occurs;
provided that if so much of the Premises or the Office Building Project are
taken by such condemnation as would substantially and adversely affect the
operation and profitability of Lessee's business conducted from the Premises,
Lessee shall have the option, to be exercised only in writing within thirty (30)
days after Lessor shall have given Lessee written notice of such taking (or in
the absence of such notice, within thirty (30) days after the condemning
authority shall have taken possession), to terminate this Lease as of the date
the condemning authority takes such possession.  If Lessee does not terminate
this Lease in accordance with the foregoing, this Lease shall remain in full
force and effect as to the portion of the Premises remaining, except that the
rent and Lessee's Share of Operating Expenses shall be reduced in

                                    - 31 -
<PAGE>

the proportion that the floor area of the Premises taken bears to the total
floor area of the Premises. Common Areas taken shall be excluded from the Common
Areas usable by Lessee and no reduction of rent shall occur with respect thereto
or by reason thereof. Lessor shall have the option in its sole discretion to
terminate this Lease as of the taking of possession by the condemning authority,
by giving written notice to Lessee of such election within thirty (30) days
after receipt of notice of a taking by condemnation of any part of the Premises
or the Office Building Project. Any award for the taking of all or any part of
the Premises or the Office Building Project under the power of eminent domain or
any payment made under threat of the exercise of such power shall be the
property of Lessor, whether such award shall be made as compensation for
diminution in value of the leasehold or for the taking of the fee, or as
severance damages; provided, however, that Lessee shall be entitled to any
separate award for loss of or damage to Lessee's trade fixtures, removable
personal property and unamortized tenant improvements that have been paid for by
Lessee. For that purpose, the cost of such improvements shall be amortized over
the original term of this Lease excluding any options. In the event that this
Lease is not terminated by reason of such condemnation, Lessor shall to the
extent of severance damages received by Lessor in connection with such
condemnation, repair any damage to the Premises caused by such condemnation
except to the extent that Lessee has been reimbursed therefor by the condemning
authority. Lessee shall pay any amount in excess of such severance damages
required to complete such repair.

          15.   BROKER'S FEE.  None. No fees are applicable to this transaction.
                ------------

          16.   ESTOPPEL CERTIFICATE.
                --------------------

                (a)  Each party (as "responding party") shall at any time upon
     not less than ten (10) business days' prior written notice from the other
     party ("requesting party") execute, acknowledge and deliver to the
     requesting party a statement in writing (i) certifying that this Lease is
     unmodified and in full force and effect (or, if modified, stating the
     nature of such modification and certifying that this Lease, as so modified,
     is in full force and effect) and the date to which the rent and other
     charges are paid in advance, if any, and (ii) acknowledging that there are
     not, to the responding party's knowledge, any uncured defaults on the part
     of the requesting party, or specifying such defaults if any are claimed.
     Any such statement may be conclusively relied upon by any prospective
     purchaser or encumbrance of the Office Building Project or of the business
     of Lessee.

                                    - 32 -
<PAGE>

                (b)  At the requesting party's option, the failure to deliver
     such statement within such time shall be a material default of this Lease
     by the party who is to respond, without any further notice to such party,
     and shall give rise to all rights of a non-defaulting party against a
     defaulting party without necessity of further notice or cure period. In
     addition, at the requesting party's option, such failure shall be
     conclusive upon such party that (i) this Lease is in full force and effect,
     without modification except as may be represented by the requesting party,
     (ii) there are no uncured defaults in the requesting party's performance,
     and (iii) if Lessor is the requesting party, not more than one month's rent
     has been paid in advance.

                (c)  If Lessor desires to finance, refinance, or sell the Office
     Building Project, or any part thereof, Lessee hereby agrees to deliver to
     any lender or purchaser designated by Lessor such financial statements of
     Lessee as may be reasonably required by such lender or purchaser. Such
     statements shall include the past three (3) years' financial statements of
     Lessee. All such financial statements shall be received by Lessor and such
     lender or purchaser in strict confidence and shall be used only for the
     purposes herein set forth and thereafter returned without duplication.

          17.   LESSOR'S LIABILITY.  The term "Lessor" as used herein shall
                ------------------
mean only the owner or owners at the time in question, of the fee title or a
lessee's interest in a ground lease of the Office Building Project, and except
as expressly provided in Section 15, in the event of any transfer of such title
or interest, Lessor herein named (and in case of any subsequent transfers then
the grantor) shall be relieved from and after the date of such transfer of all
liability as respects Lessor's obligations thereafter to be performed, provided
that any funds in the hands of Lessor or the then grantor at the time of such
transfer, in which Lessee has an interest, shall be delivered to the grantee.
The obligations contained in this Lease to be performed by Lessor shall, subject
as aforesaid, be binding on Lessor's successors and assigns, only during their
respective periods of ownership.

          18.   SEVERABILITY.  The invalidity of any provision of this Lease as
                ------------
determined by a court of competent jurisdiction shall in no way affect the
validity of any other provision hereof.

          19.   INTEREST ON PAST-DUE OBLIGATIONS.  Except as expressly herein
                --------------------------------
provided, any amount due to Lessor not paid when due shall bear interest at the
maximum rate then allowable by law or judgments from the date due. Payment of
such

                                    - 33 -
<PAGE>

interest shall not excuse or cure any default by Lessee under this Lease;
provided, however, that interest shall not be payable on late charges incurred
by Lessee nor on any amounts upon which late charges are paid by Lessee.

          20.   TIME OF ESSENCE.  Time is of the essence with respect to the
                ---------------
obligations to be performed under this Lease.

          21.   ADDITIONAL RENT.  All monetary obligations of Lessee to Lessor
                ---------------
under the terms of this Lease, including but not limited to Lessee's Share of
Operating Expense and any other expenses payable by Lessee hereunder, shall be
deemed to be rent.

          22.   INCORPORATION OF PRIOR AGREEMENTS; AMENDMENTS.  This Lease and
                ---------------------------------------------
all exhibits hereto contain all agreements of the parties with respect to any
matter mentioned herein. No prior or contemporaneous agreement or understanding
pertaining to any such matter shall be effective. This Lease may be modified in
writing only, signed by the parties in interest at the time of the modification.
Except as otherwise stated in this Lease, Lessee hereby acknowledges that
neither the real estate brokers listed in Section 15 hereof nor any cooperating
broker on this transaction nor the Lessor or any employee or agents of any of
said persons has made any oral or written warranties or representations to
Lessee relative to the condition or use by Lessee of the Premises or the Office
Building Project other than those set forth in this Lease, and Lessee
acknowledges that Lessee assumes all responsibility regarding the Occupational
Safety Health Act, the legal use and adaptability of the Premises and the
compliance thereof with all applicable laws and regulations in effect during the
term of this Lease. It is acknowledged that Lessor shall be responsible for
maintenance and compliance of the elevator and other common areas.

          23.   NOTICES.  Any notice required or permitted to be given hereunder
                -------
shall be in writing and may be given by personal delivery, by certified or
registered mail or by private overnight courier, and shall be deemed
sufficiently given: (i) if delivered by United States mail (certified, return
receipt requested), on the date received as shown on the receipt card or, (ii)
one business day after being deposited with Federal Express or similar private
carrier guaranteeing overnight delivery, cost prepaid; and (iv) in all other
cases when actually received. Either party may be noticed to the other
specifying a different address for notice purposes. A copy of all notices
required or permitted to be given to Lessor or Lessee hereunder shall be
concurrently transmitted to such party or parties at such addresses as Lessor or
Lessee may from time to time hereafter designate to notice to Lessee or Lessor.

                                    - 34 -
<PAGE>

          24.   WAIVERS.  No waiver by either party of any provision hereof
                -------
shall be deemed a waiver of any other provision hereof or of any subsequent
breach of the same or any other provision. Lessor's consent to, or approval of,
any act shall not be deemed to render unnecessary the obtaining of Lessor's
consent to or approval to any subsequent act by Lessee. The acceptance of rent
hereunder by Lessor shall not be a waiver of any preceding breach by Lessee of
any provision hereof, other than the failure of Lessee to pay the particular
rent so accepted, regardless of Lessor's knowledge of such preceding breach at
the time of acceptance of such rent.

          25.   RECORDING.  Each party shall, upon request of the other,
                ---------
execute, acknowledge and deliver to the other a "short form" memorandum of this
Lease for recording purposes.

          26.   NO RIGHT TO HOLD OVER.  Lessee has no right to retain possession
                ---------------------
of the Premises or any part thereof beyond the expiration or earlier termination
of this Lease unless agreed to by the parties. The rent payable during a hold
over shall be 150% of the rent just prior to lease termination.

          27.   CUMULATIVE REMEDIES.  No remedy or election hereunder shall be
                -------------------
deemed exclusive but shall, wherever possible, be cumulative with all other
remedies at law or in equity.

          28.   COVENANTS AND CONDITIONS.  Each provision of this Lease
                ------------------------
performable by Lessee and Lessor shall be deemed both a covenant and a
condition.

          29.   BINDING EFFECT; CHOICE OF LAW.  Subject to any provisions hereof
                -----------------------------
restricting assignment or subletting by Lessee and subject to the provisions of
Section 19, this Lease shall bind the parties, their personal representatives,
successors and assigns. This Lease shall be governed by the laws of the State
where the Office Building Project is located and any litigation concerning this
Lease between the parties hereto shall be initiated in the county in which the
Office Building Project is located.

          30.   SUBORDINATION.
                -------------

                (a)  This Lease, and any Option or right of first refusal
     granted hereby, at Lessor's option, shall be subordinate to any ground
     lease, mortgage, deed of trust, or any other hypothecation or security now
     or hereafter placed upon the Office Building Project and to any and all
     advances made on the security thereof and to all renewals, modifications,
     consolidations, replacements and extensions thereof without requirement
     that Lessee execute any

                                    - 35 -
<PAGE>

     acknowledgment of such subordination. Notwithstanding such subordination,
     Lessee's right to quiet possession of the Premises shall not be disturbed
     if Lessee is not in default and so long as Lessee shall pay the rent and
     observe and perform all of the provisions of this Lease, unless this Lease
     is otherwise terminated pursuant to its terms. If any mortgagee, trustee or
     ground lessor shall elect to have this Lease and the Options granted hereby
     prior to the lien of its mortgage, deed of trust or ground lease, and shall
     give written notice thereof to Lessee, this Lease and such Options shall be
     deemed prior to such mortgage, deed of trust or ground lease, whether this
     Lease or such Options are dated prior or subsequent to the date of said
     mortgage, deed of trust or ground lease or the date of recording thereof
     and whether or not Lessee has executed any acknowledgment of such.

                (b)  Lessee agrees to execute, any reasonable documents
     requested to evidence or effectuate an attornment, a subordination, or to
     make this Lease or any option granted herein prior to the lien of any
     mortgage, deed of trust or ground lease, as the case may be so long as such
     document is consistent with the provisions set forth herein and contains
     Lessee's right to not be disturbed as described herein. Lessee's failure to
     execute such documents within fifteen (15) business days after written
     demand shall constitute a material default by Lessee hereunder without
     further notice to Lessee or any additional cure period and shall give rise
     to all remedies of Lessor arising from a default by Lessee hereunder.

          31.   ATTORNEYS' FEES.
                ---------------

          31.1  Attorneys' Fees.  If either party or the broker(s) named herein
                ---------------
     brings an action to enforce the terms hereof or declare rights hereunder,
     the prevailing party in any such action, trial or appeal thereon, shall be
     entitled to his reasonable attorneys' fees to be paid by the losing party
     as fixed by the court in the same or a separate suit, and whether or not
     such action is pursued to decision or judgment. The provisions of this
     paragraph shall inure to the benefit of the broker named herein who seeks
     to enforce a right hereunder.

          31.2  Reimbursement.  The attorneys' fee award shall not be computed
                -------------
     in accordance with any court fee schedule, but shall be such as to fully
     reimburse all attorneys' fees reasonably incurred in good faith.

                                    - 36 -
<PAGE>

          31.3  Default.  Lessor shall be entitled to reasonable attorneys' fees
                -------
     and all other costs and expenses incurred in the preparation and service of
     notices of default and consultations in connection therewith, whether or
     not a legal action is subsequently commenced in connection with such
     default.

          32.   LESSOR'S ACCESS.
                ---------------

          32.1  Entry Onto Premises.  Lessor and Lessor's agents shall have the
                -------------------
     right to enter the Premises at reasonable times and upon reasonable notice
     for the purpose of inspecting the same, performing any services required of
     Lessor, showing the same to prospective purchasers, lenders, or lessees,
     taking such safety measures, erecting such scaffolding or other necessary
     structures, making such alterations, repairs, improvements or additions to
     the Premises or to the Office Building Project as Lessor may reasonably
     deem necessary or desirable and the erecting, using and maintaining of
     utilities, services, pipes and conduits through the Premises and/or other
     premises as long as there is no material adverse effect to Lessee's use of
     the Premises and provided Lessor shall use reasonable efforts to minimize
     the extent and duration of any interference with Lessee's use of the
     Premises. Notwithstanding anything contained herein to the contrary,
     Lessor's, and its agent's and lender's, access to the Premises shall be
     subject to Lessee's security regulations. Lessor may at any time place on
     or about the Premises or the Building any ordinary "For Sale" signs and
     Lessor may at any time during the last one hundred eighty (180) days of the
     term hereof place on or about the Premises any ordinary "For Lease" signs.

          32.2  Abatement of Rent.  All activities of Lessor pursuant to this
                -----------------
     paragraph shall be without abatement of rent, nor shall Lessor have any
     liability to Lessee for same.

          32.3  Emergency.  In case of emergency, at any time of night or day,
                ---------
     Lessee shall provide Lessor immediate access to the Premises by means of
     Lessee's personnel, security guard, by key or by any reasonably appropriate
     means. Moreover, Lesser shall have the right to enter the Premises in case
     of emergency by any reasonable means, and any such entry shall not be
     deemed a forceable or unlawful entry or detainer of the Premises or an
     eviction. Lessee waives any charges for damages or injuries or interference
     with Lessee's property or business in connection therewith, except for
     damages or injuries due to Lessor's

                                    - 37 -
<PAGE>

     or its Agents' or Contractors' negligence or willful misconduct.

          33.   AUCTIONS.  Lessee shall not conduct, nor permit to be conducted,
                --------
either voluntarily or involuntarily, any auction upon the Premises or the Common
Areas without first having obtained Lessor's prior written consent.
Notwithstanding anything to the contrary in this Lease, Lessor shall not be
obligated to exercise any standard of reasonableness in determining whether to
grant such consent. The holder of any auction on the Premises or Common Areas in
violation of this paragraph shall constitute a material default of this Lease.

          34.   SIGNS.  Lessee shall not place any sign on the Premises or the
                -----
Office Building Project without Lessor's prior written consent, which consent
shall not be unreasonably withheld or delayed. Under no circumstances shall
Lessee place a sign on any roof of the Office Building Project. All such signs
are subject to all covenants, conditions and restrictions and zoning and other
ordinances applicable to the Premises and the prior written consent of Lessor as
to the size, color and other details of any such sign. The Lessor will pay the
cost for sign plates for the sign on Moffett Park Drive and in the building
lobby. Lessee shall be entitled to signage on the South exterior wall with a
design, size and specifications reasonably approved by Lessor.

          35.   MERGER.  The voluntary or other surrender of this Lease by
                ------
Lessee, or a mutual cancellation thereof, or a termination by Lessor, shall not
work a merger, and shall, at the option of Lessor, terminate all or any existing
subtenancies or may, at the option of Lessor, operate as an assignment to Lessor
of any or all of such subtenancies.

          36.   CONSENTS.  Except for Sections 33 (Auctions) and  hereof,
                --------
wherever in this Lease the consent of one party is required to an action of the
other party, such consent shall not be unreasonably withheld, conditioned or
delayed.

          37.   GUARANTOR.  In the event that there is a guarantor of this
                ---------
Lease, said guarantor shall have the same obligations as Lessee under this
Lease.

          38.   QUIET POSSESSION.  Upon Lessee paying the rent for the Premises
                ----------------
and observing and performing all of the covenants, conditions and provisions on
Lessee's part to be observed and performed thereunder, Lessee shall have quiet
possession of the Premises for the entire term hereof subject to all of the
provisions of this Lease. The individuals executing this Lease on behalf of
Lessor represent and warrant to Lessee that they are fully authorized and
legally capable of

                                    - 38 -
<PAGE>

executing this Lease on behalf of Lessor and that such execution is binding upon
all parties holding an ownership interest in the Office Building Project.

          39.   SECURITY MEASURES - LESSOR'S RESERVATIONS.
                -----------------------------------------

          39.1  Security Measures.  Lessee hereby acknowledges that Lessor shall
                -----------------
     have no obligation whatsoever to provide guard service or other security
     measures for the benefit of the Premises or the Office Building Project.
     Lessee assumes all responsibility for the protection of Lessee, its agents,
     and invitees and the property of Lessee and of Lessee's agents and invitees
     from acts of third parties. Nothing herein contained shall prevent Lessor,
     at Lessor's sole option, from providing security protection for the Office
     Building Project or any part thereof, in which event the cost thereof shall
     be included within the definition of Operating Expenses, as set forth in
     Paragraph 4.2(b).

          39.2  Lessor's Reservations.  Lessor shall have the following rights:
                ---------------------

                (a)  To change the name or title of the Office Building Project
     or building in which the Premises are located upon not less than ninety
     (90) days prior written notice;

                (b)  To permit any lessee the exclusive right to conduct any
     business as long as such exclusive does not conflict with any rights
     expressly given herein;

                (c)  To place such signs, notices or displays as Lessor
     reasonably deems necessary or advisable upon the roof, exterior of the
     buildings or the Office Building Project or on pole signs in the Common
     Areas.

          40.   EASEMENTS.
                ---------

          40.1  Lessor's Reservations.  Lessor reserves to itself the right,
                ---------------------
     from time to time, to grant such easements, rights and dedications that
     Lessor deems necessary or desirable, and to cause the recordation of Parcel
     Maps and restrictions, so long as such easements, rights, dedications, Maps
     and restrictions do not unreasonably interfere with the use of the Premises
     by Lessee. Lessee shall sign any of the aforementioned documents upon
     request of Lessor and failure to do so shall constitute a material default
     to this Lease by Lessee without the need for further notice to Lessee.

                                    - 39 -
<PAGE>

          40.2  Obstruction.  The obstruction of Lessee's view, air, or light by
                -----------
     any structure erected in the vicinity of the Building, whether by Lessor or
     third parties, shall in no way affect this Lease or impose any liability
     upon Lessor.

          41.   PERFORMANCE UNDER PROTEST.  If at any time a dispute shall arise
                -------------------------
as to any amount or sum of money to be paid by one party to the other under the
provisions hereof, the party against whom the obligation to pay the money is
asserted shall have the right to make payment "under protest" and such payment
shall not be regarded as a voluntary payment, and there shall survive the right
on the part of said party to institute suit for recovery of such sum. If it
shall be adjudged that there was no legal obligation on the part of said party
to pay such sum or any part thereof, said party shall be entitled to recover
such sum or so much thereof as it was not legally required to pay under the
provisions of this Lease.

          42.   AUTHORITY.  If Lessee is a corporation, trust, or general or
                ---------
limited partnership, Lessee represents and warrants that each individual
executing this Lease on behalf of such entity is duly authorized to execute and
deliver this Lease on behalf of said entity. If Lessee is a corporation, trust
or partnership, Lessee shall, within thirty (30) days after execution of this
Lease, deliver to Lessor evidence of such authority satisfactory to Lessor.

          43.   NO OFFER.  Preparation of this Lease by Lessor or Lessor's agent
                --------
and submission of same to Lessee shall not be deemed an offer to Lessee to
lease. The Lease shall become binding upon Lessor and Lessee only when fully
executed by both parties.

          44.   LENDER MODIFICATION.  Lessee agrees to make such reasonable
                -------------------
modifications to this Lease as may be reasonably required by an institutional
lender in connection with the obtaining of normal financing or refinancing of
the Office Building Project provided, however, such modifications do not
increase the financial obligations of Lessee hereunder or adversely affect the
leasehold interest hereby created or Lessee's reasonable use and enjoyment of
the Premises.

          45.   MULTIPLE PARTIES.  If more than one person or entity is named as
                ----------------
either Lessor or Lessee herein, except as otherwise expressly provided herein,
the obligations of the Lessor or Lessee herein shall be the joint and several
responsibility of all persons or entities named herein as such Lessor or Lessee,
respectively.

          46.   FORCE MAJEURE.  The term "Force Majeure" shall mean only the
                -------------
following events: (i) strikes, boycotts or other

                                    - 40 -
<PAGE>

labor action whether occurring on site or occurring off site or involving the
delivery of labor and materials to the Office Building Project; (ii) inclement
weather; (iii) damage caused by fire, earthquake or other peril; (v) accident,
collapse or explosion; or (vi) government action (e.g., building moratorium) or
extraordinary delay by any governmental entity in issuing required permits
despite the parties' diligent efforts to obtain such permits.

          47.   TENANT IMPROVEMENTS.  Lessee shall be responsible for managing
                -------------------
and constructing the "Tenant Improvements" described and depicted on Exhibit E
to this Lease. Lessee shall use its best efforts to substantially complete the
Tenant Improvements prior to the Commencement Date. Lessor reserves the right to
approve Lessee's final plans, architect and contractor.

          48.   ROOF ACCESS.  Lessee shall have the right with approval of owner
                -----------
which approval will not be unreasonably withheld to install on the roof, at no
additional rent, supplementary HVAC and be responsible for its utilities,
maintenance and repair, and roof repairs directly related to the installation
and maintenance associated with the supplemental HVAC.

          49.   OPTION TO EXPAND.  In addition to any other expansion rights
                ----------------
Lessee may have under this Lease, Lessee shall have the right to lease any space
that becomes available for lease from time to time (an "Expansion Space") in the
Building and in the building located in the parking lot portion of the Office
Building Project referred to as 333-335 Moffett Park Drive, Sunnyvale. In the
event from time to time, any Expansion Space shall become available for lease,
Lessor shall provide Lessee written notice thereof, and Lessee shall have the
right to include such Expansion Space in the Premises at Fair Market Rate and
conditions in the Lease upon giving written notice to Lessor within seven (7)
business days of receiving such notice.

          50.   REASONABLE EXPENDITURES.  Any expenditure by a party permitted
                -----------------------
or required under the Lease, for which such party is entitled to demand and does
demand reimbursement from the other party, shall be limited to the fair market
value of the goods and services involved, shall be reasonably incurred, and
shall be substantiated by documentary evidence available for inspection and
review by the other party or its representative during normal business hours.

                                    - 41 -
<PAGE>

LESSOR AND LESSEE HAVE CAREFULLY READ AND REVIEWED THIS LEASE AND EACH TERM AND
PROVISION CONTAINED HEREIN AND, BY EXECUTION OF THIS LEASE, SHOW THEIR INFORMED
AND VOLUNTARY CONSENT THERETO. THE PARTIES HEREBY AGREE THAT, AT THE TIME THIS
LEASE IS EXECUTED, THE TERMS OF THIS LEASE ARE COMMERCIALLY REASONABLE AND
EFFECTUATE THE INTENT AND PURPOSE OF LESSOR AND LESSEE WITH RESPECT TO THE
PREMISES.


"LESSOR"                            "LESSEE"

Cilker Revocable Trust U.T.A.       Resonate Inc.,
dated October 9, 1990               a California Corporation


By: /s/ William H. Cilker           By: /s/ illegible
   ------------------------------      -------------------------------
  William H. Cilker, trustee

  Title:


By: /s/ Leila A. Cilker
    -----------------------------
  Leila A. Cilker, trustee

  Title:


Lessor's address for notices:       Lessee's address for notices:

William H. Cilker                   Resonate Inc.
Cilker Orchards                     385 Moffett Park Drive
1631 Willow Street, Suite 225       Suite 105
San Jose, CA 95125                  Sunnyvale, CA 94089

                                    - 42 -
<PAGE>

                                   EXHIBIT A

                                 THE PREMISES
                                 ------------


Tenant Improvements for 333 Moffett Park Drive by Dennis Kobza $ Associates,
Inc.  10/26/99

                                    - 43 -
<PAGE>

                                   EXHIBIT B
                                   ---------
                             LEGAL DESCRIPTION OF
                                   BUILDING


The land referred to herein is situated in the State of California, County of
Santa Clara, City of Sunnyvale (and is described as follows):


PARCEL ONE:
ALL OF PARCEL B, as shown upon that certain Map entitled, "Parcel Map being a
resubdivision of Parcel 5 as shown upon that certain Parcel Map recorded in Book
383 of Maps, at page 19, Santa Clara County Records", which Map was filed for
record in the office of the Recorder of the County of Santa Clara, State of
California, on February 13, 1979 in Book 435 of Maps, at page 28.

PARCEL TWO:
An easement for utilities over the Easterly 10 feet of Parcel A, as said parcel
is shown on the map above referred to, as reserved in the Deed from Control Data
Corporation to Humboldt Court Associates Six, recorded February 21, 1979 in Book
E295 of Official Records, page 284.

                                    - 44 -
<PAGE>

                                   EXHIBIT C
                             RULES AND REGULATIONS

                                 GENERAL RULES
                                 -------------

          1.    Lessee shall not suffer or permit the obstruction of any Common
Areas, including driveways, walkways and stairs.

          2.    Lessor reserves the right to refuse access to any persons Lessor
in good faith judges to be a threat to the safety, reputation, or property of
the Office Building Project and its occupants.

          3.    Lessee shall not make or permit any noise or odors that annoy or
interfere with other lessees or persons having business within the Office
Building Project.

          4.    Lessee shall not keep animals or birds within the Office
Building Project, and shall not bring bicycles, motorcycles or other vehicles
into areas not designated as authorized for same.

          5.    Lessee shall not make, suffer or permit litter except in
appropriate receptacles for that purpose.

          6.    Lessee shall not alter any lock or install new or additional
locks or bolts without first advising Lessor.

          7.    Lessee shall be responsible for the inappropriate use of any
toilet rooms, plumbing or other utilities.  No foreign substances of any kind
are to be inserted therein.

          8.    Lessee shall not deface the walls, partitions or other surfaces
of the Premises or Office Building Project.

          9.    Lessee shall not suffer or permit any thing in or around the
Premises or Building that causes excessive vibration or floor loading in any
part of the Office Building Project.

          10.   Significant freight and equipment shall be moved into or out of
the building only with the Lessor's knowledge and consent, and subject to such
reasonable limitations, techniques and timing, as may be designated by Lessor.
Lessee shall be responsible for any damage to the Office Building Project
arising from any such activity.

                                    - 45 -
<PAGE>

          11.   Lessee shall not employ any service or contractor for services
or work to be performed in the Building, that is not reasonably acceptable to
Lessor.

          12.   Lessee shall return all keys at the termination of its tenancy
and shall be responsible for the cost of replacing any keys that are lost.

          13.   No window coverings, shades or awnings shall be installed or
used by Lessee, other than those installed in the Building upon occupancy,
without Lessor's prior written consent.

          14.   No Lessee, employee or invitee shall go upon the roof of the
Building.

          15.   Lessee shall not suffer or permit smoking or carrying of lighted
cigars or cigarettes in areas reasonably designated by Lessor or by applicable
governmental agencies as non-smoking areas.

          16.   Lessee shall not use any method of heating or air conditioning
other than as provided by Lessor.

          17.   Lessee shall notify Lessor prior to the installation of any
vending machines upon the Premises.

          18.   The Premises shall not be used for lodging or manufacturing.

          19.   Lessee shall comply with all safety, fire protection and
evacuation regulations established by Lessor or any applicable governmental
agency.

          20.   Lessor reserves the right to waive any one of these rules or
regulations, and/or as to any particular Lessee, and any such waiver shall not
constitute a waiver of any other rule or regulation or any subsequent
application thereof to such Lessee.

          21.   Lessee assumes all risks from theft or vandalism and agrees to
keep its Premises locked as may be required.

          22.   Lessor reserves the right to make such other reasonable rules
and regulations as it may from time to time deem necessary for the appropriate
operation and safety of the Office Building Project and its occupants. Lessee
agrees to abide by these and such rules and regulations.

                                    - 46 -
<PAGE>

                                   EXHIBIT D

                                 PARKING RULES

          1.    Parking areas shall be used only for parking by vehicles no
longer than full size, passenger automobiles herein called "Permitted Size
Vehicles".

          2.    Lessee shall not permit or allow any vehicles that belong to or
are controlled by Lessee or Lessee's employees, suppliers, shippers, customers,
or invitees to be loaded, unloaded, or parked in areas other than those
designated by Lessor for such activities.

          3.    Users of the parking area will obey all posted signs and park
only in the areas designated for vehicle parking.

          4.    Unless otherwise instructed, every person using the parking area
is required to park and lock his own vehicle.  Lessor will not be responsible
for any damage to vehicles, injury to persons or loss of property, all of which
risks are assumed by the party using the parking area.

          5.    The maintenance, washing, waxing or cleaning of vehicles in the
parking facility or Common Area is prohibited.

          6.    Lessee shall be responsible for seeing that all its employees,
agents and invitees comply with the applicable parking rules, regulations and
laws and agreements.

          7.    Lessor reserves the right to modify these rules and/or adopt
such other reasonable and non-discriminatory rules and regulations as it may
deem necessary for the proper operation of the parking area.

          8.    Such parking use as is herein provided is intended merely as a
license only and no bailment is intended or shall be created hereby.

                                    - 47 -
<PAGE>

                                   EXHIBIT E
                        FINAL PLANS AND SPECIFICATIONS


The Final Plans, Drawings and Specifications are to be mutually approved by both
Lessor and Lessee, subject to those changes outlined in Paragraph 2.B herein.

                                    - 48 -
<PAGE>

                                   EXHIBIT F
                         COMMENCEMENT DATE MEMORANDUM
                         ----------------------------

Lessor:   Cilker Revocable Trust U.T.A. dated October 9, 1990
          ---------------------------------------------------


Lessee:   Resonate Inc., a California Corporation
          ---------------------------------------------------


Lease Date:__________________________________________________


Premises: 385 Moffett Park Drive, Suite 210
          ---------------------------------------------------
          Sunnyvale, California 94089
          ---------------------------------------------------

          Pursuant to Paragraph 4.A. of the above-referenced Lease, the
Commencement Date is hereby established as __________, 1999.


                                    LESSOR:
                                    ------
  Cilker Revocable Trust

  U.T.A. dated October 9, 1990

  By:____________________________

  William H. Cilker, trustee

  By:____________________________

  Leila A. Cilker, trustee


  LESSEE: Resonate Inc.
  ------

  By:____________________________

  Its:___________________________

                                    - 49 -
<PAGE>

                                   EXHIBIT G
                              JANITORIAL SERVICES
                              -------------------

                              JANITORIAL SERVICES

                                     Daily
                                     -----

Empty wastepaper baskets
Sweep or dust mop with treated cloth all floor surfaces
Properly arrange furniture in offices
Damp-wipe spillage on resilient floors
Clean entranceways, lobby, entrance mats
Spot-clean entrance glass and polish entrance chrome
Clean restrooms, wash basins, dispensers, and chrome fittings
Clean mirrors and frame
Wet mop floors
Sanitize toilets, toilet seats and urinals
Refill all restroom dispensers
Wash and wipe dry all drinking fountains


                                  One a Week
                                  ----------
                                  (Wednesday)

Dust ledges and partitions


                              Three Times a Week
                              ------------------
                         (Monday - Wednesday - Friday)

Vacuum clean all carpeted areas


                                    Weekly
                                    ------

Spot wash partitions, walls and doors
Wipe telephones
Remove fingerprints from woodwork, walls & partitions
Spot clean carpets
Spot clean all partition glass
Dust ledges and partitions
Dust desks, chairs, tables, and other furniture with treated cloth
Dust all ledges and other flat surfaces within reach
Dust high partition ledges and moldings
Chair mats removed and vacuumed under

                                    - 50 -
<PAGE>

                               Monthly Services
                               ----------------

                              Dust ceiling vents
                              ------------------

Vacuum all upholstered furniture
High dusting
Vacuum with cervices tool all carpet and corners


                Additional Services available at additional fee
                -----------------------------------------------

Hauling boxes, trash and office furniture
Special or additional cleaning requests
Special supplies ordered and delivered
Any other service not listed on this list of duties.

                                    - 51 -
<PAGE>

                                   EXHIBIT H
                                   ---------

                              Tenant Improvements
                              -------------------

                                    - 52 -