The network

One request for https://example.com/, running. Every cable here has a length in milliseconds and every device takes a moment to think, so the proportions are the real ones: two hops across the house cost less than a fifth of a millisecond, and one hop to the server costs nineteen.

Click anything — a device, a cable, a packet in flight — and the panel beside the map says what it is and what it is doing. The tables fill in as the simulation runs, because that is how the devices themselves learn.