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 everyth

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.