OPNET Technologies, Inc. Introduces New Release: OPNET 8.0

BETHESDA, MD -- July 18, 2001 -- OPNET Technologies, Inc. (Nasdaq: OPNT), the leading provider of intelligent network management software, today announced OPNET 8.0, the eighth major release of the core technology underlying its Guru, Modeler, and Netbiz products.

In making today's announcement, Marc Cohen, OPNET CEO, stated, "Our software complements traditional management products with an additional, crucial layer of intelligence. Our 8.0 release furthers our leadership in the areas of advanced network and application performance troubleshooting, change validation, operational planning, and automated design."

OPNET 8.0 is unique in its ability to understand networks in their entirety, including applications, routers, switches, servers, and protocols for traditional, wireless, and optical technologies. OPNET sells focused software solutions to three distinct markets: ServiceProvider Guru is marketed primarily to service providers; IT Guru to enterprises; Modeler and Netbiz to equipment manufacturers.

Alain Cohen, OPNET President and CTO, stated, "All of our products -- IT Guru, Modeler, Netbiz, and the new ServiceProvider Guru -- share the same underlying technology, what we refer to as the 'virtual network environment.' OPNET 8.0, the latest version of this core technology, brings additional value to each of our customers."

8.0 releases of the ServiceProvider Guru, IT Guru, Modeler, and Netbiz products include an improved model library, and a new QoS-savvy hybrid simulation engine designed to radically improve the speed of detailed QoS analyses. With 8.0 also comes an improved workflow and ability to import and export self-documenting network models using XML.

As with previous OPNET releases, many of the new 8.0 capabilities are provided in modular extensions to the four products. With the 8.0 Multi-Vendor Import (MVI) Module, customers can now automatically generate network models based on configuration files from their production network, and automatically configure model attributes that control routing behavior. The new NetDoctor Module automates the process of identifying and solving configuration problems, and includes a scriptable interface for automating custom analyses. The new Flow Analysis Module enables rapid analysis of traffic routing and failure scenarios. The newest specialized models, UMTS, MPLS, PNNI, and DOCSIS, have all been updated for 8.0.

Also in OPNET 8.0, the award-winning ACE Module for application performance visualization, diagnosis, and prediction has been significantly improved, furthering OPNET's competitive advantages in advanced application performance analysis. ACE has already earned OPNET the distinguished SuperQuest Award for "Best e-Business Solution." The 8.0 release of ACE includes an innovative "trace merge" feature, enabling customers to analyze muli-tiered applications with unprecedented accuracy. ACE now also ships with an "application capture" utility for remote application profiling. When combined with OPNET's products, ACE provides a seamless, integrated solution for acquiring application trace data from an operational network, analyzing it, and quantifying performance in a myriad of virtual network scenarios.

About OPNET Technologies, Inc.
Founded in 1986, OPNET Technologies, Inc. is the leading provider of intelligent network management software. The OPNET product suite combines predictive modeling and a comprehensive understanding of networking technologies to enable its customers to more effectively design and deploy networks, provision services, diagnose network and application performance problems, and predict the impact of network changes. For more information about OPNET and its products, visit www.opnet.com.

Safe Harbour Statement
The statements contained in this press release that are not purely historical are forward-looking statements within the meaning the Private Securities Litigation Reform Act of 1995, as amended, including statements regarding OPNET Technologies Inc.'s expectations, beliefs, intentions, or strategies regarding the future. All forward-looking statements included in this document are based upon information available to OPNET Technologies, Inc. as of the date hereof; OPNET Technologies, Inc. assumes no obligation to update any such forward-looking statements. Forward-looking statements involve risks and uncertainties, which could cause actual results to differ materially from those projected. For a discussion of such risks and uncertainties, see the Company's reports filed with the Securities & Exchange Commission, including its 10-K for the year ended March 31, 2001.

###

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