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Skill

GNS3

IT Infrastructure and Networking

GNS3 (Graphical Network Simulator-3) is a free, open-source software tool that lets network engineers design, configure, and test complex network topologies by emulating real routers, switches, and firewalls (including Cisco IOS images and virtual machines). It's widely used by IT professionals studying for certifications like CCNA/CCNP and by network administrators to test configurations before deploying them in production. GNS3 combines a graphical drag-and-drop interface with a backend emulation engine to closely mimic real hardware behavior.

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