An Address Resolution Protocol message is broadcast to all computers in a subnet to find the data link layer address of a host whose IP address is known but whose MAC address is unknown.

Question

Quizplus · Accepted Answer

This is an accurate description of how the Address Resolution Protocol (ARP) works. When a computer needs to communicate with another device on the same subnet, it will send an ARP request message that is broadcast to all devices on the network. The message contains the IP address of the destination device, and the sender is asking if anyone on the network knows the associated MAC address. The device with the matching IP address will respond with its MAC address, which allows the sender to complete the data link layer communication.

An Address Resolution Protocol Message Is Broadcast to All Computers