GNS3 is a graphical network simulator that allows simulation of complex networks.
To allow complete simulations, GNS3 is strongly linked with:
* Dynamips, the core program that allows Cisco IOS emulation
* Dynagen, a text-based front-end for Dynamips
* Qemu, a generic and open source machine emulator and virtualizer
* GNS3 is an excellent complementary tool to real labs for network engineers, administrators and people wanting to pass certifications such as CCNA, CCNP, CCIP, CCIE, JNCIA, JNCIS, JNCIE
ver: 2.1.11 / Oct 02.2018
ver: 2.1.3 / Feb 03.2018
ver: 2.0.3 / Oct 09.2017
The best network simulator; you can integrate anything into it.