GNS3 (Graphical Network Simulator):

GNS3 (Graphical Network Simulator) is free software allowing emulation or simulation of computer networks.
  


GNS3 is open source software that allows you to precisely establish the topology of a network operating system for advanced routing (JunOS, for example), firewall or host functions without mistreating your equipment.

In order to best meet your needs, GNS3 supports a large number of router and switch types, allowing network professionals to effectively review their Cisco and Juniper certification exams, while proving to be perfectly useful for network engineers and administrators. 


GNS3 is Basic Complete Configuration Guide for Beginners From Start to Finish!!

After installing GNS3 without much difficulty, you are able to create a project without any other form of configuration. The application supports drag and drop to make it easier to move and set up network elements.

GNS3 allows you to establish relationships between the different items arranged on the work plan. In the event of an invalid link, the program instantly displays an alert message and offers to correct your error.


Finally, GNS3 allows you to modify and adjust the attributes of each element associated with the network so that the set corresponds best to the prerequisites imposed. In addition, you can test the configuration of your network at each important stage using a simulation module.



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