3.2 Automatic IP Addressing
In Windows Server 2003 client computer can obtain automatically
obtain an IP address from a DHCP server or through Automatic
Private IP Addressing.
3.2.1 Automatic Private IP Addressing
Windows 2000 supports a new mechanism for automatic address
assignment of IP addresses for simple LAN-based network
configurations called Automatic Private IP Addressing
(APIPA). This mechanism is an extension of dynamic IP
addressing and enables the configuration of IP addresses without
using static IP address assignment or installing the DHCP Service.
The default gateway is a device on a local
network that stores network IDs of other
networks in the enterprise or Internet. To
communicate with a host on another
network you must configure an IP address
for the default gateway. TCP/IP sends
packets for remote networks to the default
gateway, which forwards the packets to
other gateways until the packet is delivered
to a gateway connected to the specified
On a computer running Windows 2000 you must configure a network LAN adapter for TCP/IP and click
Obtain an IP Address Automatically in the Internet Protocol (TCP/IP) Properties dialog box for the
Automatic Private IP Addressing feature to function properly.
APIPA can be used to set up IP configuration to allow network communication on a single subnet and is
also used when the client computer cannot contact the DHCP server for IP address configuration. APIPA
uses an addressing range from 169.254.0.1 through 169.254.255.254 and a subnet mask of 255.255.0.0.