What's the best network simulator for educational purpose? [closed]

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What's the best network simulator for educational开发者_StackOverflow purpose?

I want to use it to help students learn the basic network concepts, such as LAN, WAN, IP addressing, network layers etc.

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If you are looking for Network event simulator, ns-2 is the one. You can have a look at the example programs in ns-2 directory to illustrate basic ideas.

For demonstration of Wireless LAN,Wifi, WiMax and other networks simulation, you can make use of contributed page by other researchers and educational institutions.

ns-3 is the successor to ns-2. It supports newer technologies such as IPv6, WiMAX, and LTE, and is under active development. It is also in use as courseware