一个基于用户层的功能强大的IP包拦截控件,能拦截IP协议的各种数据包,如: UDP, ICMP, IGMP, GGP, TCP, PUP,对分析IP协议的初学者非常有帮助.-A network sniffer component for IP protocol data package filtering based on user level, this component is capable of intercepting and analysing for kinds IP protocol data package, such as: UDP, ICMP, IGMP, GGP, TCP, PUP etc, which is more helpful for fresh user at IP protocol learning.