Network Simulation

Free network simulator with GUI.

OPNET Modeler is commercial network simulator with GUI and many libraries of wired and wireless protocols. Also available are related products more suited to analysis of existing networks.

Commercial network simulator with GUI. Aimed particularly at wireless networks. Was spawned from the free software GloMoSim.

Free network simulator aimed particularly at ad hoc and satellite networks. No continuing support - the commerical version is Qualnet.

Tutorial on getting started with NS2 and NAM.

NS2 is a free network simulator, which includes many libraries for Internet and related protocols, as well as support for wireless and mobile networks.

ns2 is a popular, free package for simulating computer networks and protocols, e.g. TCP, satellite links, ad hoc networks, routing protocols.

1. Download the following packages from the ns2 website and extract them into your working directory. For example in my case /home/sgordon/ns2 is my install directory, therefore all the .tar.gz files are saved in this directory and apply tar xzvf filename.tar.gz on each: