Address Resolution Protocol
Maps an IPv4 address to a MAC address on the local link by broadcasting a who-has request and caching the unicast reply. Only the last hop uses ARP; every earlier hop rewrites the frame's MAC addresses while the IP addresses stay fixed.
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Maps an IPv4 address to a MAC address on the local link by broadcasting a who-has request and caching the unicast reply. Only the last hop uses ARP; every earlier hop rewrites the frame's MAC addresses while the IP addresses stay fixed.
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