Packet Flow Analysis Through NS2 Model

Safety measure is a necessary instruct to resolve the practical exertion in the researches of computer networks. Attacks on networks can be classified as passive and active attacks, depending on whether the normal operation of the network is disrupted or not. NS2 and OPNET are best network simulation tools, which provide very powerful simulation functions for network protocols. As the huge use of internet increases day by day so as safety anxiety is also elevate day by day in excess ofthe internet.In this paper we discuss the network security and its related threats and also study the types ofprotocols and few issues related to protocols in computer networks. We also simulate the model of nodeswired network scenario, its packet flow rate analysis through TCP protocol using NS2 as a simulator.