Netmon Professional Edition

The Netmon appliance went to work quickly to establish a baseline of network activity and begin identifying network problems.

Augmented by its built-in protocol analyzer, the Netmon appliance pinpointed network trouble spots in our tests by decoding key packets in addition to depicting the problematic network devices and servers. The Netmon device comprehensively monitored network traffic, specific protocols, bandwidth utilization, TCP/IP-based network services, switches, routers, routers, network printers, UPSes and application performance.

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You'll especially appreciate the Netmon appliance if you like solving network problems at a low level. Netmon Professional Edition lacked the application-layer perspective of Extended Technologies.