NetScout Completes Acquisition Of Fox Replay BV

PRESS RELEASE

Westford, MA – October 3, 2011 – NetScout' Systems, Inc. today announced that it has completed its acquisition of privately held Fox Replay BV, a leading provider of session reconstruction and replay technology that enables organizations to perform forensic analysis of end-user actions in support of CyberIntelligence, Information Assurance, Lawful Intercept and general security practices.

Fox Replay’s technology strengthens NetScout’s Unified Service Delivery Management strategy by providing comprehensive end-user session reconstruction and visual replay of an end-user’s activities showing an analyst exactly what the end user saw.

Financial terms of the transaction are undisclosed. The transaction is expected to have insignificant impact on earnings per share in fiscal 2012, and to be accretive in fiscal 2013 and beyond, on both a GAAP and non-GAAP basis.

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About NetScout Systems, Inc. NetScout Systems, Inc. (NASDAQ: NTCT) is the market leader in Unified Service Delivery Management enabling comprehensive end-to-end network and application assurance. For 27 years, NetScout has delivered breakthrough packet-flow technology that provides trusted and comprehensive real-time network and application performance intelligence enabling unified assurance of the network, applications and users. These solutions enable IT staff to predict, preempt and resolve network and service delivery problems while facilitating the optimization and capacity planning of the network infrastructure. NetScout nGenius' and Sniffer' solutions are deployed at more than 20,000 of the world’s largest enterprises, government agencies, and more than 130 service providers, on over 740,000 network segments to assure the network, applications, and service delivery to their users and customers. More information about NetScout is available at http://www.netscout.com.