(Sniffer software is a powerful protocol analysis software launched by Nai company. This paper aims at using snifferpro network analyzer to solve the fault. Using the powerful functions and features of snifferpro network analyzer to solve network problems, a set of reasonable fault solutions will be introduced. Compared with netxray, sniffer supports more protocols. For example, PPPoE protocol is not supported by netxray. It can perform fast decoding analysis on sniffer. Netxrayaibeili cannot run normally on Windows2000 and WindowsXP. Snifferpro4.6 can run on various windows platforms. The sniffer software is large and requires a large amount of computer memory to run. Otherwise, it runs slowly. This is also a disadvantage compared with netxray. Function introduction some functions of sniffer software are listed below. For a detailed description of its functions, please refer to the online help of snifferhuangguanpu. Capture network traffic for detailed analysis use the expert analysis system to diagnose problems, monitor network activities in real time, collect network utilization and errors, etc. before capturing traffic, first select the network adapter to determine which network adapter of the computer to receive data from. Location: File gt; selectsettings)