GNS3 is the FREE software that empowers network professionals.GNS3 is one of the Network Simulators, that allows you to use real router images and practice on the real router CLI.
For Cisco certifications such as CCNA, CCNP, and CCIE, Juniper certifications including JNCIA, JNCIP, and JNCIE, and Nokia certifications like NRS I, NRS II, and SRA, GNS3 provides an excellent hands-on environment to practice complex networking scenarios.
Vendors and Technologies Supported in GNS3
Using GNS3, you can emulate and practice with a wide range of enterprise-grade devices, including: Cisco: IOS, IOSv, IOSvL2, NX-OS (CSR1000v, Catalyst, Nexus) Juniper: vMX, vSRX, vQFX Fortinet: FortiGate VM (Firewall & Security) Palo Alto Networks: PA-VM (Next-Generation Firewall) HPE Aruba: ArubaOS-CX (Virtual Switch) Nokia: SR OS (Virtual Routers) VMware: ESXi (via nested virtualization for advanced lab scenarios) Linux-based appliances: Ubuntu, Alpine, Kali Linux, and other network tools Other virtual appliances: Load balancers, IPS/IDS, monitoring and automation tool
You can download GNS3 and start building your virtual labs to significantly enhance your technical skills, confidence, and certification readiness from the given link https://www.gns3.com/software