I would really like to have a wired internet connection to a network switch downstairs where my TV, game consoles etc. are, but my cable modem and router are upstairs in my bedroom. I asked on Reddit ...
Current setup is cable TV and Internet run through a cable company provided three-way splitter (5 Mhz -1003 Mhz) TV at each endpoint, modem at one. Works fine since the cable company put in new line.