It uses emulation technologies like Dynamips , QEMU , and KVM to run the same OS found on physical routers and switches.

Easily connect your virtual labs to the internet or physical networks and use tools like Wireshark for deep packet analysis.

To get started, follow these steps to secure the latest version: GNS3 Documentation Getting Started with GNS3

GNS3 (Graphical Network Simulator-3) is a vital tool for network engineers, students, and professionals looking to build, design, and test complex network topologies without the need for expensive physical hardware. By running actual network operating systems, GNS3 offers a high-fidelity environment for mastering certifications like CCNA, CCNP, and CCIE. Key Features of GNS3

GNS3 is free, open-source software licensed under GPL v3. How to Download GNS3 Software

Unlike brand-specific tools, GNS3 allows you to simulate devices from over 20 vendors, including Cisco , Juniper , Arista , and Fortinet .