该软件是一个有名的基于网络的入侵检测系统，其功能及相关信息在本书中做了详细的分析和说明（该软件具有的功能有：网络信息包嗅探、记录网络信息包并进行网络数据分析、基于网络的误用检测等-The software is a well-known network-based intrusion detection system, and its function and related information in the book to do a detailed analysis and exp