rotocol) A TCP/IP protocol used to obtain a node's physical address. A client station broadcasts an ARP request onto the network with the IP address of the target node it wishes to communicate with, and the node with that address responds by sending back its physical address so that packets can be transmitted. ARP returns the layer 2 address for a layer 3 address. See ARP cache
, ARP cache poisoning
and TCP/IP abc's
The IP protocol broadcasts the IP address of the destination station onto the network, and the node with that address responds.