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Lacks gigabit and WAN support Netasyst Network Analyzer starts at $1,395. Network Associates, (972) 963-8000. www.nai.com
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Netasyst lets users capture packet traces, which they can then troubleshoot with the Expert system. Packet capture is simple. After setting your filter definitions, including buffer size parameters, hit the start button on the main capture window. This brings up the capture screen, which shows you the captured network traffic in a model similar to the seven-layer OSI model. The Expert system will find problems on the segments and offer diagnosis at the same time. In my tests I used a filter to capture DNS and Web traffic. The Expert showed that a sluggish Web response was caused by a slow and overused DNS server.
To better understand the Expert's troubleshooting techniques, you can view the objects and symptoms that the system used in its analysis. Additionally, packet captures can be saved in standard capture-file formats for analysis with other tools or to be decoded later using the Expert system.
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