Have wifi router downstairs and whole house is Cat 5 wired. Plan to connect another router or AP upstairs via wired connection to get better wifi signal. Should I use a router or AP for that upstairs unit? Seems like router prices are low enough that it makes sense just to buy the router. Also, the more I read about APs, the more confused I get trying to understand what the difference is between a standalone AP vs Router. Any help/recommendations/clarification is greatly appreciated! Thank you