Apple MC340LL User Guide - Page 32

3 Click Network and configure how the base station will share its Internet access with wireless and Ethernet computers. Select the "Distribute IP addresses" checkbox and the "Share a single IP address (using DHCP & NAT)" button. By default, wireless and Ethernet client computers share a single IP address using Network Address Translation (NAT).. When Modem is selected in the "Connect using" pop-up menu in the Internet pane, both the Ethernet LAN (G) port and the Ethernet WAN ( ) port are bridged, and both can share a single IP address using NAT. Note: If you are using an AirPort Extreme Base Station that supports Power over Ethernet (PoE), the "Share a single IP address (using DHCP & NAT)" option is not selected by default, and the base station is set up to act as a bridge. Important: If you are connecting to the Internet by Ethernet or PPPoE, only the Ethernet LAN (G) port is bridged. Enabling NAT lets you share a single Internet connection among several computers. Enabling DHCP lets the base station dynamically and automatically assign IP addresses to client computers, which simplifies each computer's TCP/IP configuration. Bridging allows devices and computers using Ethernet and computers using a wireless connection to communicate with one another. 4 If you want to adjust optional advanced settings, go to "Setting Advanced Options" on page 39. If you are finished changing settings, click the Update button. Your computer transfers the new settings to the base station. When the transfer is complete, the base station restarts and its new settings are active. 32 Chapter 3 AirPort Network Designs