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Address Resolution Protocol (ARP)

A subprotocol of the TCP/IP protocol suite that operates at the Data Link layer (layer 2). ARP is used to discover the MAC address of a system by polling using its IP address. The Internet protocol used to dynamically map Internet addresses to physical (hardware) addresses on the local area network. Limited to networks that support hardware broadcast.


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A subprotocol of the TCP/IP protocol suite that operates at the Data Link layer (layer 2). RARP is used to discover the IP address of a system by polling using its MAC address.
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An attack where an attacker inserts bogus information into the ARP cache (the local memory store of discovered IP to MAC relationships).
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