And the one fact that might determine what is needed, but is almost never mentioned, is the download speed from the internet provider and that's not Gigabit, so cable choice is less important than how it's installed, coiled and stashed. If the house was pre-wired and some wire munky pulled too hard, allowed it to break over a crisp wood or steel edge, used a stapler that crushes the cable at every spot, did a bad job of terminating the ends or allowed it to be pinched by boards or something else, cable specs fly out the window.