opnet
Press release

OPNET Models Cisco Mobile IP Networks for the Defense Community

Bethesda, MD. January 29, 2003 — OPNET Technologies, Inc. (Nasdaq: OPNT), the leading provider of Intelligent Network Management software, today announced completion of a mobile IP model, developed by OPNET and Cisco Systems, Inc. The new model demonstrates features of Cisco's 3200 Series Mobile Access Router technology in operational network scenarios and supports mobile IP network planning for OPNET and Cisco customers. The new model is available to OPNET's customers as part of OPNET's IT Guru, Modeler, and SP Guru products.

The Cisco 3200 Series Mobile Access Router is optimized for mobile vehicular applications, which pioneer a shift in the way organizations communicate and share information across wireless networks. The Cisco 3200 Series Mobile Access Router, with the Mobile IP and Mobile Networks functionality in Cisco® IOS Software, offers secure data, voice and video communications, seamless mobility and interoperability for networks in motion —entire networks of communication devices in moving vehicles such as airplanes, ships, tanks and trains —and is designed for "always-on" connectivity.

OPNET's mobile IP model was designed to enhance the military's communications and operations infrastructure. The mobile IP model predicts the scalability and performance of specific Cisco Mobile IP deployments in brigade, battalion, and division scenarios.

Pradeep Singh, OPNET's senior vice president of Model R&D, stated, "Mobile IP brings us one step closer to having a ubiquitous wireless Internet. Our mobile IP model should play a meaningful role in deployment of this technology, both for Cisco's customers and ours. We have been working with Cisco for many years and together have successfully implemented models to prove the value of new technology in complex environments. This is a win-win."

James Massa, vice president, for Cisco Systems Global Defense and Space Group stated, "The OPNET modeling capability is important to us because it provides an opportunity for us to work closely with our customers to demonstrate Cisco Mobile Network features in their unique mission environments. The Cisco Mobile Networks features in Cisco IOS provide a unique mobile IP solution, which extends the edge of the IP network to vehicles. Demonstrating this via the OPNET model allows for more efficient deployment and management of mobile IP solutions. The Cisco IOS Mobile Network features are designed for incorporation into communications systems that are customized and installed by Cisco Defense and Space system integration partners."

About OPNET Technologies, Inc.
Founded in 1986, OPNET Technologies is the pioneer and leading provider of Intelligent Network Management software. For more information about OPNET and its products, visit www.opnet.com

###

OPNET, OPNET Technologies, IT Guru, Modeler, and SP Guru are trademarks of OPNET Technologies, Inc. All other trademarks are the property of their respective owners.

Statements in this press release that are not purely historical facts may constitute forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. OPNET Technologies, Inc. ("OPNET") assumes no obligation to update statements. Forward-looking statements are predictions based upon information available to OPNET as of the date of this press release and involve risks and uncertainties; therefore, actual events or results may differ materially. For a discussion of risk factors, see OPNET's reports, including its most recent 10-Q and 10-K, filed with the Securities & Exchange Commission.

###

Note to editors: The word OPNET is spelled with all upper-case letters.

OPNET Media Contact:
Margarita Castillo
OPNET Technologies, Inc.
(240) 497-3000
Media@opnet.com
www.opnet.com

OPNET Investor Relations:
Mel Wesley
OPNET Technologies
(240) 497-3000
ir@opnet.com
www.opnet.com