How ARP Works

Address Resolution Protocol (ARP) is used by a host to get the physical (MAC) address of another host on a network if it wants to send to that client packets. What the host “looking” for the mac address does is it broadcasts an ip address, if the host on the network has the broadcasted ip address, it replies with its mac and the host that was “asking” for it saves it in its ARP table. Now the two hosts can communicate. See its that simple

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