If this is the case, the host with the matching IP address delivers a unicast response to the sender of the pair request. ![]() ![]() When a request is received on the subnet, each host checks to see if the IP address in the request is tied to one of its network interfaces. The MAC address of the destination host, which matches the request, is returned to the primary host as a response to the request.Ī host broadcasts a request for the MAC address associated with the IP address of the destination when it needs to deliver an IP datagram as an Ethernet frame to another host whose MAC address it ignores. If a primary host wants to communicate with another destination host, it sends out a broadcast request to the entire network. ![]() It's used to dynamically map an internet protocol (IP) to a hardware or MAC address. What is Address Resolution Protocol (ARP)?ĪRP (Address Resolution Protocol) is a network layer communication protocol defined in RFC826.
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