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What does a router do with a packet if it can't find the destination IP address in its routing table? If a router has no route to the destination IP, it drops the packet and returns an ICMP Destination unreachable message to the source IP. If a router receives an ARP request in which the destination hardware address is a broadcast address, and if the ...


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ARP is a layer-2 thing -- it's how layer-2 address (MAC) is associated with a layer-3 address (IPv4). The router (any node) will only respond to ARP requests for addresses it owns -- the addresses assigned to it's interface(s) or aliases. It will silently ignore all others. If your router is setup to handle the ancient bad idea of proxy-arp, then yes, it ...


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