Short for
Reverse Address Resolution Protocol, a
TCP/IP protocol that permits a
physical address, such as an
Ethernet address, to be translated into an
IP address.
Hosts such as diskless workstations often only know their hardware interface addresses, or
MAC address, when
booted but not their IP addresses. They must discover their IP addresses from an external source, usually a RARP
server. RARP is defined in
RFC 903.
Compare with ARP.