I think a better question would have been to specify what type of ethernet cable? i.e cat 3-cat 9, fiber or copper, etc..
Cat6 is only good for 10Gb at relatively short distances. Otherwise, one would need to go with Cat7There is no CAT 9 that I'm aware of. I thought CAT6a would be the highest official cable type standard one might aim for. I would target CAT6a for now in unshielded twister pair for all common RJ45 type connections giving you the possibility for up to a decent 10Gb connection. For devices that may require a consistent higher throughput to run a fiber optic OM4 cable to give you some future reserve since it's rated up to 100Gb and supports 10Gb and 40Gb as well.
Cat6 is only good for 10Gb at relatively short distances. Otherwise, one would need to go with Cat7
In a single story house, even wiring up from the basement, Cat6 is "good enough."