address resolution protocol
- noun a protocol used within the TCP/IP standard that is used to determine whether the source and destination address in a packet are in the data-link control (DLC) or Internet protocol (IP) format. Once the format of the address is known, the packet can be correctly routed over a network.
- A protocol for determining the hardware, or physical, address of a specific computer, or node, within the Internet. This is accomplished by matching an IP address with a piece of hardware, such as a network interface card, which then reveals the computer it belongs to. Its abbreviation is ARP.