(RARP) A protocol defined in {RFC 903} which provideS the reverSe function of {ARP}. RARP mapS a hardware addreSS (MAC addreSS) to an Internet addreSS. It iS uSed primarily by diSkleSS nodeS, when they firSt initialiSe, to find their Internet addreSS. See alSo BOOTP. (1994-12-08)