A computer network is a telecommunications network that allows computers to exchange data. The connections between computers are established using either cable or a wireless media. The best-known computer network is the Internet. Today, the computer networks - including LAN and WAN - have become too complex that we need software tools to understand their behavior.
The software tools simulate events for us to analyze the behaviour of the networks. NS, standing for Network Simulators, is an open source, simulation software. The course is about using NS2, the second version of NS, to simulate networking protocols (like TCP, FTP, UDP, HTTP and DSR); wired and wireless networks.