Arp resolves ip addresses (to mac address) for any hosts and router interfaces on the internet.3/2/2023 As a result, ARP is said to be a link layer protocol. ARP packets are encapsulated by link layer and are distributed only in a particular network. ARP was defined in 1982 by RFC 826.ĪRP is a request-response or request-reply protocol in which one device sends a request to another device asking for some information, to which the other device will reply with the required information. The Address Resolution Protocol(ARP) is a communication protocol used to discover the data-link layer address(Layer 2 address like Media Access Control(MAC) address) associated with an Internet layer address(Layer 3 address like IPv4 address).
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