The term address resolution refers to the process of findingĪn address of a computer in a network. It is used when IPv4 is used over Ethernet. The protocol operates below the network layer as a part of the interface between the OSI network and OSI link layer. The address resolution protocol (arp) is a protocol used by the Internet Protocol (IP), specifically IPv4, to map IP network addresses to the hardware addresses used by a data link protocol. Address Resolution Protocol (arp) Address Resolution Protocol (arp)