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Network Intrusion Detection and its strategic importance

In computer network security, a Network Intrusion Detection (NID) is an Intrusion Detection mechanism that attempts to discover unauthorized access to a computer network by analyzing traffic on the network for signs of malicious activity. There are many areas of research in this vast field of Network Intrusion Detection (NID) but in this survey paper, we will focus on its technology, development & strategic importance. Virus attacks, unauthorized access, theft of information and denial-of-service attacks were the greatest contributors to computer crime, a number of techniques have been developed in the past few years to help cyber security experts in strengthening the security of a single host or the whole computer network. Intrusion Detection is important for both Military as well as commercial sectors for the sack of their Information Security, which is the most important topic of research for the future networks.