Mar 162008
 


Automatic Private IP Addressing, or APIPA as it is better known, is a feature of Windows 2000 , XP,2003 and vista operating systems that allows for the automatic assignment of IP addresses in a network where there is no DHCP server present. APIPA automatically assigns an IP address in the class B network 169.254.0.0 when it cannot successfully obtain one from a DHCP server on a network. There are many reasons why this may happen even on a network where a DHCP server is present. These reasons include heavy traffic on the server, a system hang, or the server being offline.

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