(The router checks whether the routing table has an entry that matches the destination address of the packet. Assume that the routing table contains a matching entry, and the next hop address is another router, reachable via Ethernet interface 1. The router then needs to look at the Layer 2 address of the next hop. Assuming it does not have this address, it needs to send ARP broadcast packets on Ethernet interface 1. Assuming no ARP response is received, the router discards the packet.)
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