摘要: Network security has become an essential component of any computer network. Despite significant advances having been made on network-based intrusion prevention and detection, ongoing attacks penetrating mechanisms have reported. It is being realized that such as firewalls or detection systems (IDS) are not effective in detecting certain insider without generating network traffic. The trend will be to merge host-based IDS (HIDS) networkbased (NIDS). This chapter provide the fundamentals anomaly well their developments. A new architectural framework proposed for intelligent integration multiple engines. novelty this it provides a feedback loop so one output from engine can used input another engine. also illustrated how several schemes derived framework. New research topics future discussed.