elnaz fahimi shaker - Software engineering department, Islamic Azad University- Lahijan branch, Iran
ali sajedi badashian - Software engineering department, Islamic Azad University- Lahijan branch, Iran.

With rapid growth of computer networks, choosing the methods that can analyze the network behavior are so important. Simulation softwares are good tools to simulate the new idea of network designers. Some simulations are used to commercial cases and some for education; OMNET++ is considered of commercial simulation. An important feature is object oriented that makes the process very understandable. This paper presents main contexts of simulation and facilities of OMNET++.

Network simulation, NED language, and module