And Network Intrusion Detection System ( NIDS ) is one of the. most important tools to guarantee the integrity and availability of systems and network resources, whose main task deals with identification and prevention of network-based attacks. 网络入侵检测系统是当前确保系统或网络资源完整性和可获得性的最重要的工具之一,其主要任务是识别和围堵各种各样基于网络的入侵攻击。