The <b>Address Resolution Protocol</b> (<b>ARP</b>) is a communication protocol used for mapping an Internet Protocol address (IP address) to a physical machine's link layer address (MAC address) belonging to the local network. | The <b>Address Resolution Protocol</b> (<b>ARP</b>) is a communication protocol used for mapping an Internet Protocol address (IP address) to a physical machine's link layer address (MAC address) belonging to the local network. |