Sandbox
Ten tools, all live: from quick calculators to the isometric network builder. Build, break, observe — right in the browser.
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.
Run ping and traceroute against sample destinations and watch latency, loss, and route shape unfold.
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.