State of the art analysis of network traffic anomaly detection

In the present age of pervasive computing, network anomaly detection has become an essential research area. The idea behind anomaly detection originated from the perspective of network monitoring and security As more and more people and devices get connected over the net, the need for security of information being exchanged increases.. In network monitoring, the monitoring device observes such network features like flow and capacity of a link in network, number and size of distinct flows. Where as in network security the monitoring node monitors the anomalous behavior of the nodes. In this paper we present a review of some of the existing research works on anomaly detection.