EXHIBIT 2.1

                       CERTIFICATE OF OWNERSHIP AND MERGER

                                     MERGING

                               INTRUSION.COM, INC.

                                      INTO

                               ODS NETWORKS, INC.


                     ODS Networks, Inc., a corporation organized and existing
under the laws of the State of Delaware (the "CORPORATION"), under and in
accordance with Section 253 of the General Corporation Law of the State of
Delaware (the "DGCL"), does hereby certify:

                     FIRST: That the Corporation was incorporated pursuant to
the DGCL on August 30, 1995 under the name of "Optical Data Systems, Inc."

                     SECOND: That the Corporation owns 100% of the outstanding
shares of each class of capital stock of Intrusion.com, Inc., which was
incorporated pursuant to the DGCL on February 21, 2000 ("INTRUSION").

                     THIRD: That the Board of Directors of the Corporation (the
"BOARD") has, pursuant to resolutions duly adopted at a telephonic meeting of
the Board dated April 17 , 2000 and filed with the minutes of the Board,
authorized and approved the merger of Intrusion with and into the Corporation
(the "MERGER"). Such resolutions have not been modified or rescinded and are in
full force and effect on the date hereof. A true and correct copy of such
resolutions are attached hereto as EXHIBIT A.

                     FIFTH: That the Corporation shall be the surviving
corporation in the Merger (the "SURVIVING CORPORATION").

                     SIXTH: That the Merger shall be effective on June 1, 2000
at 8:00 a.m., Eastern Standard Time.

                     SEVENTH: That the Certificate of Incorporation of the
Corporation, as amended and in effect on the date hereof, shall be the
Certificate of Incorporation of the Surviving Corporation; provided, however,
that at the effective time of the Merger, Article One of the Certificate of
Incorporation of the Surviving Corporation shall be amended in its entirety to
read as follows: "The name of the corporation is Intrusion.com, Inc." The
Surviving Corporation's Certificate of Incorporation, as amended hereby, is
restated as shown in EXHIBIT B attached hereto.




                     IN WITNESS WHEREOF, the undersigned has executed this
Certificate of Ownership and Merger on behalf of the Corporation on May 15,
2000.



                                         ODS NETWORKS, INC.



                                            /s/ JAY R. WIDDIG
                                         -----------------------------------
                                         Jay Widdig, Chief Financial Officer