A router has the following routing table entries:
A packet arrives with a destination IP address of 172.16.1.10. Which interface will the router use to forward the packet?
Interface B
Interface A
Interface C
The router selects the route with the longest prefix match for the destination IP address. The IP address 172.16.1.10 matches all three routes, but with different prefix lengths:
The route with the /24 prefix length (172.16.1.0/24 via Interface C) is the most specific match because it has the longest prefix. Therefore, the router will forward the packet through Interface C. The other interfaces have shorter prefix lengths and are less specific matches.
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