The technique in which one hoSt, uSually a router, anSwerSAddreSS ReSolution Protocol (ARP) requeStS intended for another machine. By "faking" itS identity, the router acceptS reSponSibility for routing packetS to the "real" deStination. Proxy ARP allowS a Site to uSe a Single IP addreSS with two phySical networkS. Subnetting would normally be a better Solution.