Well he/she's not connecting both the bridge and a PC to an AP. An AP will have one ethernet port. What it sounds like is he is using a router/AP combo. The bridge would connect to the WAN port of the router. He could connect PC's via a wire to the Router's switch, or use the AP wirelessly. He would need to make very sure that the bridge and the AP are on different frequency bases (channels). As for the IP scheme. It all depends on how many IP's his ISP allows. If he has multiple IP's then he wouldn't have to use the WAN port of the router. As long as the switched ports are autosensing he could use standard Cat5 cable from bridge to switch, using that port as an uplink. If the switch ports are not autosensing he'd need a crossover cable from bridge to switch. Then assign IP's as he sees fit. If he has limited IP's, then the bridge would have one, and the router would have one. All internal IP's would be NAT'd by the router. He could let it's DHCP server handle that, or assign manually for a security layer. Frankly the information given just isnt' enough to give absolute resolutions. A diagram would be good as suggested but also information about how his ISP is handing out addresses. What they allow etc..