Dynamips is described as 'Emulator computer program that was written to emulate Cisco routers. It has been created by Christophe Fillot who started his work in August 2005. Dynamips runs on Linux, Mac OS X or Windows and can emulate the hardware of the Cisco series routing platforms by' and is an app. There are four alternatives to Dynamips for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best Dynamips alternative is GNS3, which is both free and Open Source. Other great apps like Dynamips are Cisco Packet Tracer, Eve-NG and NetSim.