Will Adding a Network Switch to my repeater on the second floor of my house increase the speed/reliability of my connection if I connect it to my computer or will it be the same as using Wireless where my computer is right across the room from the repeater.
Generally using ethernet is more stable then using wireless. However I do not own a repeater so I don't know for sure about this, but I think that because it is connected to the wireless then it will not make a difference as long as you have a good connection.
I am not sure but i would guess it wouldn't make much of a difference of course depending on the quality of the repeater and the distances between your network points. If you have an switch laying around why not give it a try.
Are you looking for way to improve your network speed/reliability in general?