Apple MB321LL User Guide - Page 67

AirPort Express Interfaces, NAT router, DHCP server

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Important: If you are connecting an Ethernet network to the base station Ethernet LAN (G) port, make sure the Ethernet network does not have an Internet connection. • NAT router One of the most powerful features of the AirPort Extreme Base Station is its ability to share one Internet connection with multiple computers. To provide this service, the base station acts as a router. The base station can be configured to provide both bridging services and routing services at the same time. • DHCP server When you configure the base station to act as a DHCP server, it provides IP addresses to client computers that are configured to obtain IP addresses using DHCP. Using DHCP makes IP configuration simple for client computers, since they don't need to enter their own IP information. Using AirPort Express This section describes the different network interfaces of the AirPort Express and describes the functions the base station can provide. AirPort Express Interfaces AirPort Express has three ports, located on the bottom side: • Ethernet port (G) for connecting a DSL or cable modem, or for connecting to an existing Ethernet network • Analog and optical digital audio stereo mini-jack (-) for connecting AirPort Express to a home stereo or powered speakers • USB port ( ) for connecting a compatible printer to AirPort Express Status light AC plug adapter USB port Reset button Ethernet port Line Out port (Analog and optical digital audio mini-jack) Next to the ports is a reset button, which is used for troubleshooting your AirPort Express. The status light on the side of AirPort Express shows the current status. Chapter 5 Behind the Scenes 67

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Chapter 5
Behind the Scenes
67
Important:
If you are connecting an Ethernet network to the base station Ethernet
LAN (
G
) port, make sure the Ethernet network does not have an Internet
connection.
•
NAT router
One of the most powerful features of the AirPort Extreme Base Station is
its ability to share one Internet connection with multiple computers. To provide this
service, the base station acts as a router. The base station can be configured to
provide both bridging services and routing services at the same time.
•
DHCP server
When you configure the base station to act as a DHCP server, it
provides IP addresses to client computers that are configured to obtain IP addresses
using DHCP. Using DHCP makes IP configuration simple for client computers, since
they don’t need to enter their own IP information.
Using AirPort Express
This section describes the different network interfaces of the AirPort Express and
describes the functions the base station can provide.
AirPort Express Interfaces
AirPort Express has three ports, located on the bottom side:
•
Ethernet port (
G
) for connecting a DSL or cable modem, or for connecting to an
existing Ethernet network
•
Analog and optical digital audio stereo mini-jack (
-
) for connecting AirPort Express
to a home stereo or powered speakers
•
USB port (
) for connecting a compatible printer to AirPort Express
Next to the ports is a reset button, which is used for troubleshooting your AirPort
Express. The status light on the side of AirPort Express shows the current status.
Status light
Reset button
Line Out port
(Analog and optical
digital audio mini-jack)
Ethernet port
USB port
AC plug adapter