This talk with provide a tutorial introduction to ns, the Network
Simulator. Ns is a discrete event simulator targeted at networking research. Ns provides substantial support for simulation of TCP, routing, and multicast protocols over wired and wireless (local and satellite) networks. It is freely available, providing a collaborative simulation environment that is is very widely used in the Internet networking community to explore new protocol designs and study traffic behavior.
As an example, we will illustrate the use of Ns in a web traffic and a web performance study. Here we show how one can use the rich set of traffic workload, HTTP and TCP modules to re-produce web traffic in Ns and how the simulations enable us to study the self-similar property in web traffic and the performance problems in web protocol suite.
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