自1980年产生IDS概念以来，已经出现了基于主机和基于网络的入侵检测系统，出现了基于知识的模型识别、异常识别和协议分析等入侵检测技术，并能够对百兆、千兆甚至更高流量的网络系统执行入侵检测。-Since 1980, the concept of generated IDS has been a host-based and network-based intrusion detection system, a model of knowledge-based recognition, identification and protocol anomaly analysis, intrusion detection technology and be able to Fast, Gigabit and even higher flow of the implementation of intrusion detection systems.