Computer Network Learning Simulator Web Application
A curated list of free, browser-based networking and security simulators for CCNA, CCNP, Security+, PCNSA, NSE, CEH exam preparation. No installs. No downloads. Just click and practice.
Free browser-based Cisco IOS command-line simulator covering OSPF, ACLs, NAT, DHCP, STP, IPv6, VLANs for CCNA and CCNP preparation.
NetSim — browser-based network simulator with a Cisco IOS-style CLI, packet capture (.pcap), and an on-device AI tutor. A zero-install, open-source CCNA lab. Live demo + FastAPI.
Add a description, image, and links to the packet-tracer-alternative topic page so that developers can more easily learn about it.
To associate your repository with the packet-tracer-alternative topic, visit your repo's landing page and select "manage topics."