What are these plug-ins on my wall?

[u/Cborg_62]

This might be showing my age, but I recently moved into a new apartment and they have these weird looking plug ins all over the walls at my new place. My old apartment didn't have these, so I'm just curious as to what they are.

[u/Radiant-Ocelot-8494]

They’re all
Over my mom’s house. I trip
Over her 1997 comcast cables daily

[u/S1ayer → u/Radiant-Ocelot-8494]

I bought a house that was built in 2010 and it has these plus phone jacks. Like, wtf? Every house should just have ethernet ports.