The Codex Lab

Interactive network systems

Protocols make more sense when you can move through them.

A growing collection of visual labs for the protocols, elections, path decisions, RF math, spatial streams, and authentication handshakes that keep networks moving.

STPSpanning TreeOSPFOSPFSUBSubnettingHEXNumber BasesRFRF MathMUMU-MIMOAUTH802.1X

Learn the logic, not just the command.

Every explorer turns network behavior into something visible: elected roots, forwarding paths, database scope, metric changes, convergence behavior, link budgets, and multi-user wireless streams.

Built for engineers who want to test an intuition quickly, teach a concept clearly, or inspect why a network chooses one path over another.