Networking Sandbox

A free-play arena unlocked after the 10 networking lessons. Place PCs, PLCs, HMIs, switches, and routers. Wire them up. Set IPs and subnet masks. Ping between any two endpoints — the engine returns ✓ L2 (same subnet), ✓ L3 (cross-subnet via router), or ✗ no route to host. Cut cables to break the topology. Save layouts locally; share a working network with anyone via a URL link.