Document:

PROMISSORY NOTE

$150,000.00                                                     February 4, 2000

     GALAXY  ENTERPRISES,  INC.,  a Nevada  corporation  ("Galaxy")  and JOHN J.
POELMAN,  in his  individual  capacity  ("Poelman"  and  together  with  Galaxy,
collectively  and  jointly and  severally,  "Maker")  and  NETGATEWAY,  INC.,  a
Delaware corporation ("Holder") hereby agree as follows:

     1. Principal.

     For value received,  Maker,  jointly and severally,  promises to pay to the
order of  Holder,  at its  offices at 300  Oceangate,  5th  Floor,  Long  Beach,
California  90802,  or at such  other  place as  Holder  may  from  time to time
designate in writing, the principal sum of One Hundred Fifty Thousand and No One
Hundredths Dollars  ($150,000.00),  together with accrued interest from the date
of  disbursement  hereunder  on the  unpaid  principal  at the rate set forth in
Paragraph  4. As used  herein,  the term  "Holder"  shall  mean  Holder  and any
subsequent holder of this Promissory Note (this "Note"), whichever is applicable
from time to time.

     On the date hereof, Holder shall disburse One Hundred Fifty Thousand and No
One Hundredths Dollars ($150,000) to Maker, pursuant to the terms hereof.

     2. Maturity Date.

     Galaxy and Holder  intend to enter into the Merger  Agreement  pursuant  to
which Galaxy  Acquisition Corp. shall merge with and into Galaxy and Galaxy will
become a  wholly-owned  subsidiary  of Holder  (the  "Transaction").  The unpaid
principal  balance hereof,  together with all unpaid interest  accrued  thereon,
shall be due and payable on June 1, 2000 or such earlier  date, if any, that the
Transaction shall have been consummated (the "Maturity Date").

     3. Prepayment.

     This Note may be prepaid in full or in part,  at any time without  penalty,
upon not less than one  business  days' prior  written  notice to Holder.  Maker
shall have no right to reborrow any such prepaid amounts.

     4. Interest.

     All interest on the outstanding  principal  balance hereof shall be due and
payable on the Maturity Date.  The  outstanding  principal  balance hereof shall
bear  interest at a rate of 9.5% per annum.  All  payments of  principal  of and
interest on the Note shall be made  without  deduction of any present and future
taxes, levies, imposts, deductions, charges or withholdings, which amounts shall
be paid by  Maker.  Maker  will pay the  amounts  necessary  such that the gross
amount of the  principal  and interest  received by Holder is not less than that
required by this Note. All stamp and  documentary  taxes shall be paid by Maker.
If, notwithstanding the foregoing, Holder pays such taxes, Maker will

reimburse  Holder for the amount paid.  Maker will furnish  Holder  official tax
receipts or other evidence of payment of all taxes.  Throughout the term of this
Note,  interest shall be calculated on a 360-day year, but shall be computed for
the actual number of days in the period for which interest is charged.

     5. Manner of Payment.

     Principal  and interest are payable in lawful money of the United States of
America.  All  payments of  principal  and interest on the Note shall be made to
Holder in immediately available funds not later than 11:30 a.m. Los Angeles time
on the dates such payments are to be made. Any payment received after 11:30 a.m.
shall be deemed received by Holder on the next business day.

     6. Applications of Payments.

     Payments  received by Holder  pursuant to the terms hereof shall be applied
first to the  payment of all  interest  accrued to the date of such  payment and
second to the payment of  principal.  Notwithstanding  anything to the  contrary
contained  herein,  after the occurrence and during the continuation of an Event
of Default (as  hereinafter  defined),  all amounts  received by Holder from any
party  shall be applied in such order as  Holder,  in its sole  discretion,  may
elect.

     7. Security.

     This Note is secured by (i) a Pledge Agreement dated as of January 7, 2000,
executed by Poelman in favor of Holder and (ii) a Pledge Agreement dated of even
date herewith, executed by Poelman in favor of Holder (collectively, the "Pledge
Agreements").  Prior to the date hereof,  Maker shall have provided  Holder with
certified  resolutions  of the Board of  Directors of Maker  approving  the loan
evidenced  by  this  Note  and  the  Pledge  Agreement.  The  Pledge  Agreements
specifically contemplate that subsequent advances may be made by Holder to Maker
which advances shall be secured by the Pledge Agreements.

     8. Events of Default.

     The  occurrence of any of the  following  shall be deemed to be an event of
default ("Event of Default") hereunder:

          (a) Holder  shall have  notified  Maker in writing of a default in the
     payment of principal or interest when due pursuant to the terms hereof;

          (b) If, on any date  following  the date of this  Note and the  Pledge
     Agreement (the "Calculation  Date"), the arithmetic mean of the closing bid
     price of the common stock as reported on the OTC  Bulletin  Board for the 5
     consecutive   trading  days  ending  on  the  trading  day   preceding  the
     Calculation Date (the  "Calculated  Price") is equal to or less than 75% of
     the  closing  bid  price of the  common  stock  on the  date of the  Pledge
     Agreement (the "Closing Price"),  and, within 10 days after the Calculation
     Date,  Poelman  shall have  failed to deliver  to  Netgateway  certificates
     representing an additional number of

                                      -2-

     shares of Galaxy's  common stock equal to (i) the  difference,  in dollars,
     between the  Closing  Price and the  Calculated  Price,  multiplied  by the
     number of  shares of the  common  stock of  Galaxy  representing  the Stock
     Collateral, divided by (ii) the Calculated Price; or

          (b) the  occurrence of an Event of Default under the Pledge  Agreement
     now or hereafter securing this Note.

     9. Remedies; Post-Default Rate; Late Charge.

     Upon the  occurrence  of an Event of Default and without  demand or notice,
Holder shall have the option to declare the entire balance of principal together
with all accrued  interest  thereon  immediately due and payable and to exercise
all  rights  and  remedies  available  to it  under  the  Pledge  Agreements  or
applicable  law.  Notwithstanding  any  provision  of this  Note  or the  Pledge
Agreements to the contrary,  any principal,  accrued interest, and other amounts
payable under this Note or the Pledge  Agreements  which remain unpaid after the
Maturity Date or any  acceleration  of this Note,  shall bear interest at a rate
per annum equal to 14.5% (the  "Post-Default  Rate").  If any payment under this
Note  (whether of principal or interest or both and including the payment due on
the Maturity Date or upon any  acceleration of this Note) is not paid within ten
(10) days after the date on which the payment is due, Maker shall pay to Holder,
in addition to the delinquent  payment and without any  requirement of notice or
demand by Holder,  a late  payment  charge  equal to five  percent  (5%) of such
delinquent  amount.  MAKER EXPRESSLY  ACKNOWLEDGES AND AGREES THAT THE FOREGOING
ACCRUAL OF INTEREST AT THE  POST-DEFAULT  RATE AND LATE PAYMENT CHARGE PROVISION
IS REASONABLE UNDER THE CIRCUMSTANCES EXISTING ON THE DATE OF THIS NOTE, THAT IT
WOULD BE EXTREMELY  DIFFICULT AND  IMPRACTICAL  TO FIX HOLDER'S  ACTUAL  DAMAGES
ARISING OUT OF (i) ANY FAILURE TO PAY SUCH OUTSTANDING INDEBTEDNESS OF THIS NOTE
UPON THE MATURITY DATE OR UPON ANY  ACCELERATION  OF THIS NOTE AND (ii) ANY LATE
PAYMENT AND THAT  INTEREST  ACCRUED AT THE  POST-DEFAULT  RATE AND THE FOREGOING
LATE PAYMENT  CHARGE  SHALL BE PRESUMED TO BE THE ACTUAL  AMOUNT OF SUCH DAMAGES
INCURRED BY HOLDER.  The  application  of this default rate or late charge shall
not be  interpreted  or deemed to limit any of Holder's  remedies  hereunder  or
thereunder.  No delay or omission on the part of Holder hereof in exercising any
right under this Note or the Pledge Agreements shall operate as a waiver of such
right.

     10. WAIVER.

     MAKER HEREBY WAIVES DILIGENCE,  PRESENTMENT,  PROTEST AND DEMAND, NOTICE OF
PROTEST, DISHONOR AND NONPAYMENT OF THIS NOTE AND EXPRESSLY AGREES THAT, WITHOUT
IN ANY WAY  AFFECTING THE  LIABILITY OF MAKER  HEREUNDER,  HOLDER MAY EXTEND ANY
MATURITY DATE OR THE TIME FOR PAYMENT OF ANY INSTALLMENT  DUE HEREUNDER,  ACCEPT
SECURITY,  RELEASE ANY PARTY  LIABLE  HEREUNDER  AND RELEASE ANY SECURITY NOW OR
HEREAFTER SECURING THIS NOTE. MAKER FURTHER WAIVES, TO THE FULL EXTENT PERMITTED
BY LAW, THE RIGHT TO PLEAD ANY AND ALL STATUTES OF  LIMITATIONS  AS A DEFENSE TO
ANY DEMAND ON THIS NOTE, OR ON ANY DEED OF TRUST, PLEDGE

                                      -3-

AGREEMENT,  LEASE  ASSIGNMENT,  GUARANTY  OR OTHER  AGREEMENT  NOW OR  HEREAFTER
SECURING  THIS  NOTE.  MAKER  ALSO  EXPRESSLY  AND  UNCONDITIONALLY  WAIVES,  IN
CONNECTION WITH ANY SUIT,  ACTION OR PROCEEDING  BROUGHT BY HOLDER ON THIS NOTE,
ANY AND EVERY RIGHT IT MAY HAVE TO (I) INJUNCTIVE RELIEF,  (II) A TRIAL BY JURY,
(III)  INTERPOSE ANY  COUNTERCLAIM  THEREIN AND (IV) HAVE THE SAME  CONSOLIDATED
WITH ANY OTHER OR SEPARATE SUIT, ACTION OR PROCEEDING.  NOTHING HEREIN CONTAINED
SHALL  PREVENT OR PROHIBIT  MAKER FROM  INSTITUTING  OR  MAINTAINING  A SEPARATE
ACTION AGAINST HOLDER WITH RESPECT TO ANY ASSERTED CLAIM.

     11. Attorneys' Fees.

     If this Note is not paid when due or if any Event of Default occurs,  Maker
promises  to pay all costs of  enforcement  and  collection,  including  but not
limited to, Holder's  reasonable  attorneys' fees,  whether or not any action or
proceeding is brought to enforce the provisions  hereof.  Upon demand by Holder,
Maker  shall also pay the  reasonable  fees and  expenses  of  Holder's  counsel
incurred  in  connection  with  the  preparation  of this  Note  and the  Pledge
Agreements.

     12. Severability.

     Every provision of this Note is intended to be severable.  In the event any
term or provision hereof is declared by a court of competent jurisdiction, to be
illegal or invalid for any reason  whatsoever,  such  illegality  or  invalidity
shall not affect the balance of the terms and provisions hereof, which terms and
provisions shall remain binding and enforceable.

     13. Interest Rate Limitation.

     It is the intent of Maker and Holder in the  execution of this Note and all
other instruments  securing this Note that the loan evidenced hereby comply with
the usury laws of the State of California.  Holder and Maker stipulate and agree
that none of the terms and provisions  contained  herein shall ever be construed
to create a  contract  for use,  forbearance  or  detention  of money  requiring
payment of interest at a rate in excess of the maximum  interest rate  permitted
to be  charged by the laws of the State of  California.  In such  event,  if any
Holder of this Note shall collect monies which are deemed to constitute interest
which would  otherwise  increase the  effective  interest rate on this Note to a
rate in excess of the maximum  rate  permitted  to be charged by the laws of the
State of  California,  all such sums deemed to constitute  interest in excess of
such maximum rate shall, at the option of Holder,  be credited to the payment of
the sums due hereunder or returned to Maker.

     14. Number and Gender.

     In this Note the singular shall include the plural and the masculine  shall
include  the  feminine  and neuter  gender,  and vice  versa,  if the context so
requires.

                                      -4-

     15. Headings.

     Headings  at the  beginning  of each  numbered  Paragraph  of this Note are
intended  solely for  convenience  and are not to be deemed or construed to be a
part of this Note.

     16. Choice of Law.

     This Note shall be governed by and construed in accordance  with the law of
the State of California.

     IN WITNESS WHEREOF,  Maker has executed this Promissory Note as of the date
first above written.

                                     GALAXY ENTERPRISES, INC.,
                                     a Nevada corporation

                                     By: /s/ John J. Poelman
                                         ---------------------------------------
                                         Name:  John J. Poelman
                                         Title: President

                                     /s/ John J. Poelman
                                     -------------------------------------------
                                     JOHN J. POELMAN, in his individual capacity

                                      -5-<PAGE>

                                                                     EXHIBIT 4.1

                           EFFICIENT NETWORKS, INC.

                      1999 NONSTATUTORY STOCK OPTION PLAN

                            STOCK OPTION AGREEMENT

     Unless otherwise defined herein, the terms defined in the Plan shall have
the same defined meanings in this Option Agreement.

I.  NOTICE OF STOCK OPTION GRANT
    ----------------------------

     OptioneeName

     OptioneeAddress1

     OptioneeAddress2

     You have been granted an option to purchase Common Stock of the Company,
subject to the terms and conditions of the Plan and this Option Agreement, as
follows:

     Grant Number                      GrantNumber
                                                  -------------------------
     Date of Grant                     DateofGrant
                                                  -------------------------
     Vesting Commencement Date         VestingCommencement
                                                          -----------------
     Exercise Price per Share          $ ExercisePrice
                                                      ---------------------
     Total Number of Shares Granted    SharesGranted
                                                    -----------------------
     Total Exercise Price              $ ExercisePrice
                                                      ---------------------
     Type of Option:                   Nonstatutory Stock Option
                                                                -----------
     Term/Expiration Date:             ExpirationDate
                                                     ----------------------
     Note:
     ----

     Stock options are complicated instruments.  Please contact your tax advisor
for any personal tax issues that may arise with any stock transactions.

     Vesting Schedule:
     ----------------

     Subject to the Optionee continuing to be a Service Provider on such dates,
this Option shall vest and become exercisable in accordance with the following
schedule:
<PAGE>

     25% of the Shares subject to the Option shall vest twelve months after the
Vesting Commencement Date, and 1/48th of the Shares subject to the Option shall
vest upon the last day of each month thereafter, subject to the Optionee
continuing to be a Service Provider on such dates.

     Termination Period:
     ------------------

     This Option may be exercised for three months after Optionee ceases to be a
Service Provider.  Upon the death or Disability of the Optionee, this Option may
be exercised for such longer period as provided in the Plan.  In no event shall
this Option be exercised later than the Term/Expiration Date as provided above.

II.  AGREEMENT
     ---------

     1.   Grant of Option.  The Plan Administrator of the Company hereby grants
          ---------------
to the Optionee named in the Notice of Grant attached as Part I of this
Agreement (the "Optionee") an option (the "Option") to purchase the number of
Shares, as set forth in the Notice of Grant, at the exercise price per share set
forth in the Notice of Grant (the "Exercise Price"), subject to the terms and
conditions of the Plan, which is incorporated herein by reference. Subject to
Section 14(b) of the Plan, in the event of a conflict between the terms and
conditions of the Plan and the terms and conditions of this Option Agreement,
the terms and conditions of the Plan shall prevail.

     2.   Exercise of Option.
          ------------------

          (a)  Right to Exercise.  This Option is exercisable during its term in
               -----------------
accordance with the Vesting Schedule set out in the Notice of Grant and the
applicable provisions of the Plan and this Option Agreement.

          (b)  Method of Exercise. This Option is exercisable by delivery of an
               ------------------
exercise notice, in the form attached as Exhibit A (the "Exercise Notice"),
which shall state the election to exercise the Option, the number of Shares in
respect of which the Option is being exercised (the "Exercised Shares"), and
such other representations and agreements as may be required by the Company
pursuant to the provisions of the Plan. The Exercise Notice shall be completed
by the Optionee and delivered to the Company's Chief Financial Officer. The
Exercise Notice shall be accompanied by payment of the aggregate Exercise Price
as to all Exercised Shares. This Option shall be deemed to be exercised upon
receipt by the Company of such fully executed Exercise Notice accompanied by
such aggregate Exercise Price.

          No Shares shall be issued pursuant to the exercise of this Option
unless such issuance and exercise complies with Applicable Laws.  Assuming such
compliance, for income tax purposes the Exercised Shares shall be considered
transferred to the Optionee on the date the Option is exercised with respect to
such Exercised Shares.

                                      -2-
<PAGE>

     3.   Method of Payment. Payment of the aggregate Exercise Price shall be by
          -----------------
any of the following, or a combination thereof, at the election of the Optionee:

          (a)      cash;

          (b)      check;

          (c)      consideration received by the Company under a cashless
exercise program implemented by the Company in connection with the Plan; or

          (d)      surrender of other Shares which (i) in the case of Shares
acquired upon exercise of an option, have been owned by the Optionee for more
than six (6) months on the date of surrender, and (ii) have a Fair Market Value
on the date of surrender equal to the aggregate Exercise Price of the Exercised
Shares.

     4.   Non-Transferability of Option. This Option may not be transferred in
          -----------------------------
any manner otherwise than by will or by the laws of descent or distribution and
may be exercised during the lifetime of Optionee only by the Optionee. The terms
of the Plan and this Option Agreement shall be binding upon the executors,
administrators, heirs, successors and assigns of the Optionee.

     5.   Term of Option. This Option may be exercised only within the term set
          --------------
out in the Notice of Grant, and may be exercised during such term only in
accordance with the Plan and the terms of this Option Agreement.

     6.   Tax Consequences. Some of the federal tax consequences relating to
          ----------------
this Option, as of the date of this Option, are set forth below. THIS SUMMARY IS
NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE.
THE OPTIONEE SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THIS OPTION OR
DISPOSING OF THE SHARES.

          (a)      Exercising the Option. The Optionee may incur regular federal
                   ---------------------
income tax liability upon exercise of an NSO. The Optionee will be treated as
having received compensation income (taxable at ordinary income tax rates) equal
to the excess, if any, of the Fair Market Value of the Exercised Shares on the
date of exercise over their aggregate Exercise Price. If the Optionee is an
Employee or a former Employee, the Company will be required to withhold from his
or her compensation or collect from Optionee and pay to the applicable taxing
authorities an amount in cash equal to a percentage of this compensation income
at the time of exercise, and may refuse to honor the exercise and refuse to
deliver Shares if such withholding amounts are not delivered at the time of
exercise.

          (b)      Disposition of Shares. If the Optionee holds NSO Shares for
                   ---------------------
at least one year, any gain realized on disposition of the Shares will be
treated as long-term capital gain for federal income tax purposes.

                                      -3-
<PAGE>

     7.   Entire Agreement; Governing Law. The Plan is incorporated herein by
          -------------------------------
reference. The Plan and this Option Agreement constitute the entire agreement of
the parties with respect to the subject matter hereof and supersede in their
entirety all prior undertakings and agreements of the Company and Optionee with
respect to the subject matter hereof, and may not be modified adversely to the
Optionee's interest except by means of a writing signed by the Company and
Optionee. This agreement is governed by the internal substantive laws, but not
the choice of law rules, of California.

     8.   NO GUARANTEE OF CONTINUED SERVICE. OPTIONEE ACKNOWLEDGES AND AGREES
          ---------------------------------
THAT THE VESTING OF SHARES PURSUANT TO THE VESTING SCHEDULE HEREOF IS EARNED
ONLY BY CONTINUING AS A SERVICE PROVIDER AT THE WILL OF THE COMPANY (AND NOT
THROUGH THE ACT OF BEING HIRED, BEING GRANTED AN OPTION OR PURCHASING SHARES
HEREUNDER). OPTIONEE FURTHER ACKNOWLEDGES AND AGREES THAT THIS AGREEMENT, THE
TRANSACTIONS CONTEMPLATED HEREUNDER AND THE VESTING SCHEDULE SET FORTH HEREIN DO
NOT CONSTITUTE AN EXPRESS OR IMPLIED PROMISE OF CONTINUED ENGAGEMENT AS A
SERVICE PROVIDER FOR THE VESTING PERIOD, FOR ANY PERIOD, OR AT ALL, AND SHALL
NOT INTERFERE WITH OPTIONEE'S RIGHT OR THE COMPANY'S RIGHT TO TERMINATE
OPTIONEE'S RELATIONSHIP AS A SERVICE PROVIDER AT ANY TIME, WITH OR WITHOUT
CAUSE.

     By your signature and the signature of the Company's representative below,
you and the Company agree that this Option is granted under and governed by the
terms and conditions of the Plan and this Option Agreement.  Optionee has
reviewed the Plan and this Option Agreement in their entirety, has had an
opportunity to obtain the advice of counsel prior to executing this Option
Agreement and fully understands all provisions of the Plan and Option Agreement.
Optionee hereby agrees to accept as binding, conclusive and final all decisions
or interpretations of the Administrator upon any questions relating to the Plan
and Option Agreement.  Optionee further agrees to notify the Company upon any
change in the residence address indicated below.

OPTIONEE                            EFFICIENT NETWORKS, INC.

----------------------              --------------------------------
Signature                           By

----------------------              --------------------------------
OptioneeName                        Title

OptioneeAddress1
OptioneeAddress2

                                      -4-
<PAGE>

                                   EXHIBIT A
                                   ---------

                           EFFICIENT NETWORKS, INC.

                      1999 NONSTATUTORY STOCK OPTION PLAN

                                EXERCISE NOTICE

Efficient Networks, Inc.
4849 Alpha Road
Dallas, Texas  75244

Attention:  Chief Financial Officer

     1.   Exercise of Option. Effective as of today, ________________, _____,
          ------------------
the undersigned ("Purchaser") hereby elects to purchase ______________ shares
(the "Shares") of the Common Stock of Efficient Networks, Inc. (the "Company")
under and pursuant to the 1999 Nonstatutory Stock Option Plan (the "Plan") and
the Stock Option Agreement dated, ___________, _____ (the "Option Agreement").
The purchase price for the Shares shall be $__________, as required by the
Option Agreement.

     2.   Delivery of Payment. Purchaser herewith delivers to the Company the
          -------------------
full purchase price for the Shares.

     3.   Representations of Purchaser. Purchaser acknowledges that Purchaser
          ----------------------------
has received, read and understood the Plan and the Option Agreement and agrees
to abide by and be bound by their terms and conditions.

     4.   Rights as Shareholder. Until the issuance (as evidenced by the
          ---------------------
appropriate entry on the books of the Company or of a duly authorized transfer
agent of the Company) of the Shares, no right to vote or receive dividends or
any other rights as a shareholder shall exist with respect to the Optioned
Stock, notwithstanding the exercise of the Option. The Shares so acquired shall
be issued to the Optionee as soon as practicable after exercise of the Option.
No adjustment will be made for a dividend or other right for which the record
date is prior to the date of issuance, except as provided in Section 12 of the
Plan.

     5.   Tax Consultation. Purchaser understands that Purchaser may suffer
          ----------------
adverse tax consequences as a result of Purchaser's purchase or disposition of
the Shares. Purchaser represents that Purchaser has consulted with any tax
consultants Purchaser deems advisable in connection with the purchase or
disposition of the Shares and that Purchaser is not relying on the Company for
any tax advice.
<PAGE>

     6.   Entire Agreement; Governing Law.  The Plan and Option Agreement are
          -------------------------------
incorporated herein by reference.  This Agreement, the Plan and the Option
Agreement constitute the entire agreement of the parties with respect to the
subject matter hereof and supersede in their entirety all prior undertakings and
agreements of the Company and Purchaser with respect to the subject matter
hereof, and may not be modified adversely to the Purchaser's interest except by
means of a writing signed by the Company and Purchaser.  This agreement is
governed by the internal substantive laws, but not the choice of law rules, of
California.

Submitted by:                       Accepted by:

PURCHASER                           EFFICIENT NETWORKS, INC.

--------------------------          ------------------------------------
Signature                           By

--------------------------          ------------------------------------
Print Name                          Title

                                    ------------------------------------
                                    Date Received

Address:                            Address:  4849 Alpha Road
------- ------------------          -------   Dallas, Texas 75244

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

        ------------------
<PAGE>

                            EFFICIENT NETWORKS, INC.

                      1999 NONSTATUTORY STOCK OPTION PLAN

     1.  Purposes of the Plan. The purposes of this Nonstatutory Stock Option
         --------------------
Plan are:
         .  to attract and retain the best available personnel for positions of
            substantial responsibility,

         .  to provide additional incentive to Employees and Consultants, and

         .  to promote the success of the Company's business.

         Options granted under the Plan will be Nonstatutory Stock Options.

     2.  Definitions.  As used herein, the following definitions shall apply:
         -----------
         (a) "Administrator" means the Board or any of its Committees as shall
              -------------
be administering the Plan, in accordance with Section 4 of the Plan.

         (b) "Applicable Laws" means the requirements relating to the
              ---------------
administration of stock option plans under U.S. state corporate laws, U.S.
federal and state securities laws, the Code, any stock exchange or quotation
system on which the Common Stock is listed or quoted and the applicable laws of
any foreign country or jurisdiction where Options are, or will be, granted under
the Plan.

         (c)  "Board" means the Board of Directors of the Company.
               -----
         (d)  "Code" means the Internal Revenue Code of 1986, as amended.
               ----
         (e)  "Committee" means a committee of Directors appointed by the Board
               ---------
              in accordance with Section 4 of the Plan.

         (f)  "Common Stock" means the Common Stock of the Company.
               ------------
         (g)  "Company" means Efficient Networks, Inc.
               -------
         (h)  "Consultant" means any person, including an advisor, engaged by
               ----------
              the Company or a Parent or Subsidiary to render services to such
              entity.

         (i)  "Director" means a member of the Board.
               --------

         (j)  "Disability" means total and permanent disability as defined in
               ----------
              Section 22(e)(3) of the Code.

<PAGE>

         (k) "Employee" means any person, including Officers, employed by the
              --------
Company or any Parent or Subsidiary of the Company. A Service Provider shall not
cease to be an Employee in the case of (i) any leave of absence approved by the
Company or (ii) transfers between locations of the Company or between the
Company, its Parent, any Subsidiary, or any successor. Neither service as a
Director nor payment of a director's fee by the Company shall be sufficient to
constitute "employment" by the Company.

         (l) "Exchange Act" means the Securities Exchange Act of 1934, as
              ------------
amended.

         (m) "Fair Market Value" means, as of any date, the value of Common
              -----------------
Stock as follows:

             (i) If the Common Stock is listed on any established stock exchange
or a national market system, including without limitation the Nasdaq National
Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its Fair Market
Value shall be the closing sales price for such stock (or the closing bid, if no
sales were reported) as quoted on such exchange or system for the last market
trading day prior to the time of determination, as reported in The Wall Street
Journal or such other source as the Administrator deems reliable;

             (ii) If the Common Stock is regularly quoted by a recognized
securities dealer but selling prices are not reported, the Fair Market Value of
a Share of Common Stock shall be the mean between the high bid and low asked
prices for the Common Stock on the last market trading day prior to the day of
determination, as reported in The Wall Street Journal or such other source as
the Administrator deems reliable;

             (iii) In the absence of an established market for the Common Stock,
the Fair Market Value shall be determined in good faith by the Administrator.

         (n) "Notice of Grant" means a written or electronic notice evidencing
              ---------------
certain terms and conditions of an individual Option grant. The Notice of Grant
is part of the Option Agreement.

         (o) "Officer" means a person who is an officer of the Company within
              -------
the meaning of Section 16 of the Exchange Act and the rules and regulations
promulgated thereunder.

         (p) "Option" means a nonstatutory stock option granted pursuant to the
              ------
Plan, that is not intended to qualify as an incentive stock option within the
meaning of Section 422 of the Code and the regulations promulgated thereunder.

         (q) "Option Agreement" means an agreement between the Company and an
             ----------------
Optionee evidencing the terms and conditions of an individual Option grant. The
Option Agreement is subject to the terms and conditions of the Plan.

         (r) "Option Exchange Program" means a program whereby outstanding
              -----------------------
options are surrendered in exchange for options with a lower exercise price.

<PAGE>

         (s)  "Optioned Stock" means the Common Stock subject to an Option.
               --------------

         (t)  "Optionee" means the holder of an outstanding Option granted under
               --------
the Plan.

         (u)  "Parent" means a "parent corporation," whether now or hereafter
               ------
existing, as defined in Section 424(e) of the Code.

         (v)  "Plan" means this 1999 Nonstatutory Stock Option Plan.
               ----

         (w)  "Service Provider" means an Employee including an Officer,
               ----------------
Consultant or Director.

         (x)  "Share" means a share of the Common Stock, as adjusted in
               -----
accordance with Section 12 of the Plan.

         (y)  "Subsidiary" means a "subsidiary corporation," whether now or
               ----------
hereafter existing, as defined in Section 424(f) of the Code.

     3.  Stock Subject to the Plan.  Subject to the provisions of Section 12 of
         -------------------------
the Plan, the maximum aggregate number of Shares which may be optioned and sold
under the Plan is Nine Hundred Fifty Thousand (950,000) Shares. The Shares may
be authorized, but unissued, or reacquired Common Stock.

         If an Option expires or becomes unexercisable without having been
exercised in full, or is surrendered pursuant to an Option Exchange Program, the
unpurchased Shares which were subject thereto shall become available for future
grant or sale under the Plan (unless the Plan has terminated).

     4.  Administration of the Plan.
         --------------------------
         (a) Administration. The Plan shall be administered by (i) the Board or
            --------------
(ii) a Committee, which committee shall be constituted to satisfy Applicable
Laws.

         (b) Powers of the Administrator. Subject to the provisions of the Plan,
             ---------------------------
and in the case of a Committee, subject to the specific duties delegated by the
Board to such Committee, the Administrator shall have the authority, in its
discretion:

             (i) to determine the Fair Market Value of the Common Stock;

             (ii) to select the Service Providers to whom Options may be granted
hereunder;

             (iii) to determine whether and to what extent Options are granted
hereunder;

<PAGE>

             (iv) to determine the number of shares of Common Stock to be
covered by each Option granted hereunder;

             (v)  to approve forms of agreement for use under the Plan;

             (vi) to determine the terms and conditions, not inconsistent with
the terms of the Plan, of any award granted hereunder. Such terms and conditions
include, but are not limited to, the exercise price, the time or times when
Options may be exercised (which may be based on performance criteria), any
vesting acceleration or waiver of forfeiture restrictions, and any restriction
or limitation regarding any Option or the shares of Common Stock relating
thereto, based in each case on such factors as the Administrator, in its sole
discretion, shall determine;

             (vii) to reduce the exercise price of any Option to the then
current Fair Market Value if the Fair Market Value of the Common Stock covered
by such Option shall have declined since the date the Option was granted;

             (viii)  to institute an Option Exchange Program;

             (ix) to construe and interpret the terms of the Plan and awards
granted pursuant to the Plan;

             (x) to prescribe, amend and rescind rules and regulations relating
to the Plan, including rules and regulations relating to sub-plans established
for the purpose of qualifying for preferred tax treatment under foreign tax
laws;

             (xi) to modify or amend each Option (subject to Section 14(b) of
the Plan), including the discretionary authority to extend the post-termination
exercisability period of Options longer than is otherwise provided for in the
Plan;

             (xii) to authorize any person to execute on behalf of the Company
any instrument required to effect the grant of an Option previously granted by
the Administrator;

             (xiii) to determine the terms and restrictions applicable to
Options;

             (xiv) to allow Optionees to satisfy withholding tax obligations by
electing to have the Company withhold from the Shares to be issued upon exercise
of an Option that number of Shares having a Fair Market Value equal to the
amount required to be withheld. The Fair Market Value of the Shares to be
withheld shall be determined on the date that the amount of tax to be withheld
is to be determined. All elections by an Optionee to have Shares withheld for
this purpose shall be made in such form and under such conditions as the
Administrator may deem necessary or advisable; and

             (xv) to make all other determinations deemed necessary or advisable
for administering the Plan.

<PAGE>

         (c) Effect of Administrator's Decision. The Administrator's decisions,
             ----------------------------------
determinations and interpretations shall be final and binding on all Optionees
and any other holders of Options.

     5.  Eligibility.  Options may be granted to Service Providers; provided,
         -----------
however, that notwithstanding anything to the contrary contained in the Plan,
Options may not be granted to Officers and Directors.

     6. Limitation. Neither the Plan nor any Option shall confer upon an
Optionee any right with respect to continuing the Optionee's relationship as a
Service Provider with the Company, nor shall they interfere in any way with the
Optionee's right or the Company's right to terminate such relationship at any
time, with or without cause.

     7.  Term of Plan. The Plan shall become effective upon its adoption by the
         ------------
Board. It shall continue in effect for ten (10) years, unless sooner terminated
under Section 14 of the Plan.

     8.  Term of Option.  The term of each Option shall be stated in the Option
         --------------
Agreement.

     9.  Option Exercise Price and Consideration.
         ---------------------------------------

         (a) Exercise Price. The per share exercise price for the Shares to be
             --------------
issued pursuant to exercise of an Option shall be determined by the
Administrator.

         (b) Waiting Period and Exercise Dates. At the time an Option is
             ---------------------------------
granted, the Administrator shall fix the period within which the Option may be
exercised and shall determine any conditions which must be satisfied before the
Option may be exercised.

         (c) Form of Consideration. The Administrator shall determine the
             ---------------------
acceptable form of consideration for exercising an Option, including the method
of payment. Such consideration may consist entirely of:

             (i)   cash;

             (ii)  check;

             (iii) promissory note;

             (iv)  other Shares which (A) in the case of Shares acquired upon
                   exercise of an option, have been owned by the Optionee for
                   more than six months on the date of surrender, and (B) have
                   a Fair Market Value on the date of surrender equal to the
                   aggregate exercise price of the Shares as to which said
                   Option shall be exercised;

             (v)   consideration received by the Company under a cashless
                   exercise program implemented by the Company in connection
                   with the Plan;

<PAGE>

             (vi)   a reduction in the amount of any Company liability to the
                    Optionee, including any liability attributable to the
                    Optionee's participationin any Company-sponsored deferred
                    compensation program or arrangement;

             (vii)  such other consideration and method of payment for the
                    issuance of Shares to the extent permitted by Applicable
                    Laws; or

             (viii) any combination of the foregoing methods of payment.

     10.  Exercise of Option.
          ------------------

         (a) Procedure for Exercise; Rights as a Shareholder. Any Option granted
             -----------------------------------------------
hereunder shall be exercisable according to the terms of the Plan and at
such times and under such conditions as determined by the Administrator and
set forth in the Option Agreement.  An Option may not be exercised for a
fraction of a Share.

             An Option shall be deemed exercised when the Company receives: (i)
written or electronic notice of exercise (in accordance with the Option
Agreement) from the person entitled to exercise the Option, and (ii) full
payment for the Shares with respect to which the Option is exercised.  Full
payment may consist of any consideration and method of payment authorized by the
Administrator and permitted by the Option Agreement and the Plan.  Shares issued
upon exercise of an Option shall be issued in the name of the Optionee or, if
requested by the Optionee, in the name of the Optionee and his or her spouse.
Until the Shares are issued (as evidenced by the appropriate entry on the books
of the Company or of a duly authorized transfer agent of the Company), no right
to vote or receive dividends or any other rights as a shareholder shall exist
with respect to the Optioned Stock, notwithstanding the exercise of the Option.
The Company shall issue (or cause to be issued) such Shares promptly after the
Option is exercised.  No adjustment will be made for a dividend or other right
for which the record date is prior to the date the Shares are issued, except as
provided in Section 12 of the Plan.

             Exercising an Option in any manner shall decrease the number of
Shares thereafter available, both for purposes of the Plan and for sale under
the Option, by the number of Shares as to which the Option is exercised.

         (b) Termination of Relationship as a Service Provider. If an Optionee
             -------------------------------------------------
ceases to be a Service Provider, other than upon the Optionee's death or
Disability, the Optionee may exercise his or her Option, but only within such
period of time as is specified in the Option Agreement, and only to the extent
that the Option is vested on the date of termination (but in no event later than
the expiration of the term of such Option as set forth in the Option Agreement).
In the absence of a specified time in the Option Agreement, the Option shall
remain exercisable for three (3) months following the Optionee's termination.
If, on the date of termination, the Optionee is not vested as to his or her
entire Option, the Shares covered by the unvested portion of the Option shall
revert to the Plan. If, after termination, the Optionee does not exercise his or
her Option within the time specified by the Administrator, the Option shall
terminate, and the Shares covered by such Option shall revert to the Plan.

<PAGE>

         (c) Disability of Optionee. If an Optionee ceases to be a Service
             ----------------------
Provider as a result of the Optionee's Disability, the Optionee may exercise his
or her Option within such period of time as is specified in the Option
Agreement, to the extent the Option is vested on the date of termination (but in
no event later than the expiration of the term of such Option as set forth in
the Option Agreement). In the absence of a specified time in the Option
Agreement, the Option shall remain exercisable for twelve (12) months following
the Optionee's termination. If, on the date of termination, the Optionee is not
vested as to his or her entire Option, the Shares covered by the unvested
portion of the Option shall revert to the Plan. If, after termination, the
Optionee does not exercise his or her Option within the time specified herein,
the Option shall terminate, and the Shares covered by such Option shall revert
to the Plan.

             (d) Death of Optionee. If an Optionee dies while a Service
                 -----------------
Provider, the Option may be exercised within such period of time as is specified
in the Option Agreement (but in no event later than the expiration of the term
of such Option as set forth in the Notice of Grant), by the Optionee's estate or
by a person who acquires the right to exercise the Option by bequest or
inheritance, but only to the extent that the Option is vested on the date of
death. In the absence of a specified time in the Option Agreement, the Option
shall remain exercisable for twelve (12) months following the Optionee's
termination. If, at the time of death, the Optionee is not vested as to his or
her entire Option, the Shares covered by the unvested portion of the Option
shall immediately revert to the Plan. The Option may be exercised by the
executor or administrator of the Optionee's estate or, if none, by the person(s)
entitled to exercise the Option under the Optionee's will or the laws of descent
or distribution. If the Option is not so exercised within the time specified
herein, the Option shall terminate, and the Shares covered by such Option shall
revert to the Plan .

             (e) Buyout Provisions. The Administrator may at any time offer to
                 -----------------
buy out for a payment in cash or Shares, an Option previously granted based on
such terms and conditions as the Administrator shall establish and communicate
to the Optionee at the time that such offer is made.

     11.  Non-Transferability of Options.  Unless determined otherwise by the
          ------------------------------
Administrator, an Option may not be sold, pledged, assigned, hypothecated,
transferred, or disposed of in any manner other than by will or by the laws of
descent or distribution and may be exercised, during the lifetime of the
Optionee, only by the Optionee.  If the Administrator makes an Option
transferable, such Option shall contain such additional terms and conditions as
the Administrator deems appropriate.

     12. Adjustments Upon Changes in Capitalization, Dissolution, Merger or
         -----------------------------------------------------------------
Asset Sale.
----------
         (a) Changes in Capitalization. Subject to any required action by the
             -------------------------
shareholders of the Company, the number of shares of Common Stock covered by
each outstanding Option, and the number of shares of Common Stock which have
been authorized for issuance under the Plan but as to which no Options have yet
been granted or which have been returned to the Plan upon cancellation or
expiration of an Option, as well as the price per share of Common Stock covered
by each such outstanding Option, shall be proportionately adjusted for any
increase or decrease in the number of issued shares of Common Stock resulting
from a stock split, reverse stock split, stock

<PAGE>

dividend, combination or reclassification of the Common Stock, or any other
increase or decrease in the number of issued shares of Common Stock effected
without receipt of consideration by the Company; provided, however, that
conversion of any convertible securities of the Company shall not be deemed to
have been "effected without receipt of consideration." Such adjustment shall be
made by the Board, whose determination in that respect shall be final, binding
and conclusive. Except as expressly provided herein, no issuance by the Company
of shares of stock of any class, or securities convertible into shares of stock
of any class, shall affect, and no adjustment by reason thereof shall be made
with respect to, the number or price of shares of Common Stock subject to an
Option.

         (b) Dissolution or Liquidation. In the event of the proposed
             --------------------------
dissolution or liquidation of the Company, the Administrator shall notify each
Optionee as soon as practicable prior to the effective date of such proposed
transaction. The Administrator in its discretion may provide for an Optionee to
have the right to exercise his or her Option until ten (10) days prior to such
transaction as to all of the Optioned Stock covered thereby, including Shares as
to which the Option would not otherwise be exercisable. In addition, the
Administrator may provide that any Company repurchase option applicable to any
Shares purchased upon exercise of an Option shall lapse as to all such Shares,
provided the proposed dissolution or liquidation takes place at the time and in
the manner contemplated. To the extent it has not been previously exercised, an
Option will terminate immediately prior to the consummation of such proposed
action.

         (c) Merger or Asset Sale. In the event of a merger of the Company with
             --------------------
or into another corporation, or the sale of substantially all of the assets of
the Company, each outstanding Option shall be assumed or an equivalent option or
right substituted by the successor corporation or a Parent or Subsidiary of the
successor corporation. In the event that the successor corporation refuses to
assume or substitute for the Option, the Optionee shall fully vest in and have
the right to exercise the Option as to all of the Optioned Stock, including
Shares as to which it would not otherwise be vested or exercisable. If an Option
becomes fully vested and exercisable in lieu of assumption or substitution in
the event of a merger or sale of assets, the Administrator shall notify the
Optionee in writing or electronically that the Option shall be fully vested and
exercisable for a period of fifteen (15) days from the date of such notice, and
the Option shall terminate upon the expiration of such period. For the purposes
of this paragraph, the Option shall be considered assumed if, following the
merger or sale of assets, the option or right confers the right to purchase or
receive, for each Share of Optioned Stock, immediately prior to the merger or
sale of assets, the consideration (whether stock, cash, or other securities or
property) received in the merger or sale of assets by holders of Common Stock
for each Share held on the effective date of the transaction (and if holders
were offered a choice of consideration, the type of consideration chosen by the
holders of a majority of the outstanding Shares); provided, however, that if
such consideration received in the merger or sale of assets is not solely common
stock of the successor corporation or its Parent, the Administrator may, with
the consent of the successor corporation, provide for the consideration to be
received upon the exercise of the Option, for each Share of Optioned Stock to be
solely common stock of the successor corporation or its Parent equal in fair
market value to the per share consideration received by holders of Common Stock
in the merger or sale of assets.

<PAGE>

     13. Date of Grant. The date of grant of an Option shall be, for all
         -------------
purposes, the date on which the Administrator makes the determination granting
such Option, or such other later date as is determined by the Administrator.
Notice of the determination shall be provided to each Optionee within a
reasonable time after the date of such grant.

     14.  Amendment and Termination of the Plan.
          -------------------------------------

             (a) Amendment and Termination. The Board may at any time amend,
                 -------------------------
alter, suspend or terminate the Plan.

             (b) Effect of Amendment or Termination. No amendment, alteration,
                 ----------------------------------
suspension or termination of the Plan shall impair the rights of any Optionee,
unless mutually agreed otherwise between the Optionee and the Administrator,
which agreement must be in writing and signed by the Optionee and the Company.
Termination of the Plan shall not affect the Administrator's ability to exercise
the powers granted to it hereunder with respect to options granted under the
Plan prior to the date of such termination.

     15.  Conditions Upon Issuance of Shares.
          ----------------------------------
         (a) Legal Compliance. Shares shall not be issued pursuant to the
             ----------------
exercise of an Option unless the exercise of such Option and the issuance and
delivery of such Shares shall comply with Applicable Laws and shall be further
subject to the approval of counsel for the Company with respect to such
compliance.

         (b) Investment Representations. As a condition to the exercise of an
             --------------------------
Option the Company may require the person exercising such Option to represent
and warrant at the time of any such exercise that the Shares are being purchased
only for investment and without any present intention to sell or distribute such
Shares if, in the opinion of counsel for the Company, such a representation is
required.

     16.  Inability to Obtain Authority.  The inability of the Company to obtain
          -----------------------------
authority from any regulatory body having jurisdiction, which authority is
deemed by the Company's counsel to be necessary to the lawful issuance and sale
of any Shares hereunder, shall relieve the Company of any liability in respect
of the failure to issue or sell such Shares as to which such requisite authority
shall not have been obtained.

     17. Reservation of Shares. The Company, during the term of this Plan, will
         ---------------------
at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

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