I've just bought an AirPort Extreme (5th Gen) to improve WiFi coverage in my house. My previous setup was as follows: CABLE MODEM -> ethernet -> D-LINK DI-604 WIRED ETHERNET ROUTER -> ethernet -> AIRPORT EXPRESS -> wireless -> MACBOOKS. I'm pretty ignorant when it comes to network setups, so to keep the setup simple I replaced the EXPRESS with the EXTREME and told AirPort Utility to copy the settings of the EXPRESS to the EXTREME. These settings are: Wireless Mode: Create a wireless network Wireless Security: WPA2 Personal Allow network to be extended: No MAC Address Access Control: Not Enabled Connect to Internet using: Ethernet Internet Connection Sharing: Off (Bridge Mode) IPv6 Mode: Local-link only I still have the D-LINK DI-604 WIRED ETHERNET ROUTER upstream of the EXTREME, to which my desktop computers are still wired. But as the EXTREME has 3 ethernet ports, I could in theory remove the D-LINK and use the EXTREME as both my wired and wireless router, i.e.: CABLE MODEM -> ethernet -> AIRPORT EXTREME -> wireless -> MACBOOKS. What would be the advantages/disadvantages to replacing the D-LINK with the EXTREME, e.g. is the NAT firewall in the EXTREME just the same as in the D-LINK? And what settings would I need to change on the EXTREME if I did remove the D-LINK from the chain? Finally, how would I go about adding the EXPRESS back into the network, i.e. what would the AirPort Utility settings for the EXPRESS need to be if I wanted to use the EXPRESS to extend the WiFi range of the EXTREME? Would the EXPRESS need to be connected to the EXTREME by ethernet or could it connect wirelessly?