(& amp; nbsp;& amp; amp; nbsp; 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& amp; amp; nbsp;& amp; amp; nbsp; Compared with netxray, sniffer supports more protocols. For example, PPPoE protocol is not supported by netxray. It can perform fast decoding analysis on sniffer. Netxray can not run normally on Windows2000 and WindowsXP. Snifferpro4.6 can run on various windows platforms& amp; amp; nbsp;& amp; amp; nbsp; 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.)