rarp

from The Free On-line Dictionary of Computing (8 July 2008)

Reverse Address Resolution Protocol
RARP
Reverse ARP

   <networking, protocol> (RARP) A {protocol} defined in {RFC
   903} which provides the reverse function of {ARP}.  RARP maps
   a hardware address ({MAC address}) to an {IP address}.
   It is used primarily by {diskless nodes}, when they first
   initialise, to find their {IP address}.

   See also {BOOTP}.

   (1994-12-08)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

RARP
       Reverse Address Resolution Protocol (Internet, RFC 903)