Both are APs.. They're just configured differently.. The difference is in the layer2 connectivity..

Non-bridged will have a broadcast domain on the wireless side and a different one on the wired side. You will need to use ip routing the get the traffic from one side to the other..

In bridged mode the wireless and wired sides will be a single broadcast domain. No need to route the traffic as a wired device will be "directly connected" to a wireless device.

Basic ethernet & TCP/IP stuff.. It doesn't matter if it's wired, wireless or both.. Read up on ARP and broadcasts, bridging vs. routing..