I have a cat 5 cable running to a wireless access port that is connected to my wireless router. Online I show as having a physical connection, because the last connection to the PC is a plug.

The connection is also pretty solid compared to when I try to use wifi on the same PC to connect to the same wireless access point, which is just over 6 foot away with no obstructions (just checked), or the main router which is in another room.

Seems weird, but it works.