GNS3 - Open Source Virtual Network Simulator

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GNS3 - Open Source Virtual Network Simulator

GNS3 (Graphic Network Stimulator) is a free open source network software emulator, which can be used  to emulate, configure, test and troubleshoot virtual and real networks. It allows the combination of virtual and real devices to simulate complex networks. It provides good Graphic User Interface (GUI) design and have been intensively used for learners to build, configure, and troubleshoot networks in a virtualized network environment.

The main features of GNS3 include:

  • Real-time network simulation for pre-deployment testing without the need for network hardware
  • Test 20+ different network vendors in risk-free virtual environment
  • Create dynamic network maps for troubleshooting and proof of concept (POC) testing
  • Connect GNS3 to any real network
  • Customized topologies and labs within GNS3 for network certification training
  • Design of high quality and complex network topologies.
  • Emulation of many Cisco router platforms and PIX firewalls.
  • Simulation of simple Ethernet, ATM and Frame Relay switches.