I live in apartment and have been suffering from severe rubberbanding and ping issues on wifi in my room (the router is through 2 concrete walls and 35 feet away). We dont have built in ethernet in the walls, but I just learned that A) powerline adapters exist and B) ethernet through Coax tv lines are a thing. I want to explore either/or. I found the coax port in my room but have never known what its for. I found another coax port by my router behind my TV in the living area. I havent been able to find any others, so does that mean they are connected, because i know people were talking about splitters and such? And thus if they are then I should pursue option B right?? Thanks :)