ARP: Address Resolution Protocol is a computer networking protocol for determining a network host's hardware address when only its logical address is given. This hardware address is required to transfer data from one node to another.
IP: Internet Protocol is the primary protocol in the internet layer of internet protocol suite. It is used for delivering datagrams from the source host to the destination host solely based on their logical addresses.
In OSI protocol suite ARP comes in data link layer and IP is in network layer.
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