Sandbox
Tools are landing one by one. First tool: the subnet calculator.
Convert an IPv4/CIDR pair into network, broadcast, host range, wildcard mask, and binary form.
Walk through recursive DNS resolution, cache hits, TTL, and common record types.
Quick tables for OSI layers, ports, protocols, private ranges, and command examples.
Plain-language definitions for core networking terms, with tiny examples.
A safe command simulator for ping, traceroute, nslookup, ipconfig, and route inspection.
Compare latency, packet loss, hop count, and route shape across sample destinations.
Step through Discover, Offer, Request, and Acknowledge with lease details.
Follow one HTTP request across the isometric board: headers wrap, hop, and unwrap layer by layer.
Drop devices onto an isometric board, cable them up, and fire packets to watch them hop — or drop.
Five missions on the isometric board: build topologies under port and cable constraints, earn stars.