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To download the GNS3 GUI and set up your virtual networking lab, you must first understand that GNS3 operates on a client-server model. The (Graphical User Interface) is the client application where you design your topologies, while the GNS3 Server or GNS3 VM runs the actual network device emulations. How to Download the GNS3 GUI
The GNS3 GUI is free, open-source software available for Windows, macOS, and Linux. download gns3 gui