I know what a router is lol. I just was wondering what are the available options to use all the coax connections already in the house so I could connect everything via Ethernet , if you wanted to avoid running Ethernet through the walls or don’t want Ethernet cables visible

When I was younger and before WiFi was a thing I naively thought I’d just plug in a new modem.

Makes sense when you put it that way.

It actually sounds like they just want a switch