Filed by TekInsight.com,Inc.
                                       pursuant to Rule 425 under the Securities
                                       Act of 1933, as amended.

                                       Subject Company: Data Systems Network
                                       Corporation
                                       Commission File No.: 33-336044




FOR IMMEDIATE RELEASE
For more information, contact:
Melissa Beck
Edelman Public Relations Worldwide
312-240-3376
melissa_beck@edelman.com

Julie Hall
Edelman Public Relations Worldwide
312-297-7525
julie_hall@edelman.com

           TekInsight.com And Data Systems Network Corporation Extend
                              Merger Closing Date

New York - June 30, 2000 - TekInsight.com (NASDAQ: TEKS-TEKSW), a provider of
advanced Internet and e-commerce products and solutions, and Data Systems
Network Corporation (OTC BB: DSYS), a leading provider of enterprise services,
today jointly announce the extension of the required Closing Date for the Merger
of Data Systems into a wholly-owned subsidiary of TekInsight. In order to allow
for additional time to satisfy all conditions to finalizing the Merger, the
Merger Agreement has been amended to extend the outside Closing Date from June
30, 2000 to September 15, 2000, although the parties anticipate that the Closing
will occur in August 2000.

About TekInsight.com

TekInsight.com is a world-class Internet development company that offers
software and services based on its Streaming XML(TM) technology, which harnesses
the vast amount of information by streaming it into XML and compressing the
format for real-time storage and presentation. TekInsight's customers include
Microsoft, IBM and other Fortune 500 companies. The company's proprietary
technology includes various web-based diagnostic software agents and web-based
e-commerce performance and analysis tools. In April 2000, TekInsight.com, Inc.
announced the availability of its first of several software agents,
BugSolver(TM) Developer. BugSolver Developer helps software development
personnel provide virtually instant, accurate answers to desktop/mobile computer
users when a hardware or software failure occurs.

About Data Systems Network Corporation

Data Systems Network Corporation, the Computer Associates 1999 New Business
Partner of the Year, has more than 13 years of experience providing strategic
technology solutions to Fortune 1000 companies and over 16 state and local
government agencies. The company provides a wide range of services, including
Applications Development,



Network Services, Enterprise Management, Help Desk and Security Services. To
learn more about Data Systems Network, please call (248) 489-8700 or visit the
company web site at www.datasystems.com.

                                      # # #
Forward Looking Statements

This press release contains certain forward-looking statements within the
meaning of Section 27A of the Securities Act of 1933, as amended, and Section
21E of the Securities Exchange Act of 1934, as amended, which are intended to be
covered by the safe harbors created thereby. Investors are cautioned that
certain statements in this release are "forward looking statements" within the
meaning of the Private Securities Litigation Reform Act of 1995 and involve
known and unknown risks, uncertainties and other factors. Such uncertainties and
risks include, among others, certain risks associated with the operation of the
company described above, government regulation, and general economic and
business conditions. Actual events, circumstances, effects and results may be
materially different from the results, performance or achievements expressed or
implied by the forward-looking statements. Consequently, the forward looking
statements contained herein should not be regarded as representations by
TekInsight.com, or any other person that the projected outcomes can or will be
achieved.

Additional Information and Where to Find It

TekInsight.com filed a Registration Statement on SEC Form S-4 in connection with
the merger on May 1, 2000 (SEC file # 33-336044), and TekInsight.com and Data
Systems expect to mail a Joint Proxy Statement/Prospectus to shareholders of
TekInsight.com and Data Systems containing information about the merger.
Investors and shareholders are urged to read the Registration Statement and the
Joint Proxy Statement/Prospectus. The Registration Statement and the Joint Proxy
Statement/Prospectus contain important information about TekInsight.com, Data
Systems, the merger, the persons soliciting proxies relating to the merger,
their interests in the merger, and other related matters. TekInsight and its
officers and directors may be deemed participants in the solicitation of proxies
from its stockholders with respect to the transactions contemplated by the
merger agreement and may have an interest either directly or indirectly by
virtue of their security holdings or otherwise. Information regarding such
officers and directors is included in the Registration Statement and the Joint
Proxy Statement/ Prospectus. Data Systems and its officers and directors may be
deemed to be participants in the solicitation of proxies from stockholders of
Data Systems with respect to the transactions contemplated by the merger
agreement and may have an interest either directly or indirectly by virtue of
their security holdings or otherwise. Information regarding such officers and
directors is included in the Registration Statement and the Joint Proxy
Statement/Prospectus Investors and shareholders will be able to obtain free
copies of these documents through the website maintained by the U.S. Securities
and Exchange Commission at http://www.sec.gov. Free copies of the Joint Proxy
Statement/Prospectus and these other documents may also be obtained from
TekInsight.com by directing a request to TekInsight.com, Inc., 5 Hanover Square,
24th Floor, New York, New York 10004, attention: Arion Kalpaxis, telephone:
(212) 278-8520.

In addition to the Registration Statement and the Joint Proxy
Statement/Prospectus, TekInsight.com and Data Systems file annual, quarterly and
special reports, proxy statements and other information with the Securities and
Exchange Commission. You may read and copy any reports, statements or other
information filed by TekInsight.com or Data Systems at the SEC's public
reference room at 450 Fifth Street, N.W., Washington D.C. 20549 or at any of the
Commission's other public reference rooms in New York, New York and Chicago,
Illinois. Please call the Commission at 1-800-SEC-0330 for further information
on the public reference rooms. TekInsight.com's and Data Systems' filings with
the SEC are also available to the public from commercial document-retrieval
services and at the Web site maintained by the SEC at http://www.sec.gov