Network Simulator 2 is a popular open source discrete event simulator that substantial support for simulation of TCP, routing, and multicast protocols over wired and wireless networks. NS-2 mainly find its application in the networking research to simulate wired and wireless networks. The provides overview of NS2 and NS2 Installation, Working with simple examples - wired and wireless scenario, Working with existing protocols, Simulation and interpretation of trace file, Trace file analysis usin ...