New TV in the House

My sister just bought a new TV for the bedroom. It's a nice cable-ready HDTV type TV that she got cheaper than other electronics store prices because her friend works as a sales agent at the store where she got it from and she got a discount. Anyway, the TV works real good. Good thing our big brother, who's so handy when it comes to electronics did everything to do the wiring and cable tv connections and all. I'm not an electrnic-savvy person myself. I never know what a
CAT6 is until recently.