I already have a wireless router but the signal strength doesn't seem to penetrate brick walls well. I want to add another wireless switch to access the same Internet but am not sure exactly what I should purchase. I know I don't want another router, so what should I buy?
what you want is a wireless repeater not a switch. you can buy the crappy 30 dollar wifi repeaters in the store or you can buy a real router that supports being turned into a repeater and use that. also make sure you are running 802.11n not g, if you are on g upgrade to n and you may not need a repeater at all. make sure your router is one with external antennas and not internal, you can add larger antennas that way.