The Research and Development of Intrusion Detection

With the development of the network technology the computer network is applied to a lot of fields of the human activity extensively.Therefore the security problem of the network is receiving more and more extensive concerns.In order to find hostility behavior and take action before it do harm to the system and date,the intrusion detection system is born.Intrusion detection has become a strong barrier of the network security.The thesis first introduces the present situation of network security and analyses the impendency and the necessity of Network Intrusion Detection System in network security.Then we introduce the basic concept of intrusion detection and analyze the problem of intrusion detection.