[implements]

You might find these pages interesting:

https://en.wikipedia.org/wiki/S-100_bus

https://en.wikipedia.org/wiki/Bus_(computing)

It’s a physical data highway that allows devices to communicate with each other.

Early routers were ‘normal’ computers with lots of network cards plugged into a bus. Data arrived on one card, and was routed to another by the operating system.

Your home router is still a computer, but miniaturises everything to a much simpler circuit board with the network connectors directly soldered on.