QuestionQ98

IP Connectivity

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Refer to the exhibit. A packet sourced from 172.16.3.254 is destined for the IP address of GigabitEthernet0/0/0. What is the subnet mask of the destination route?

  • A 0.0.0.0
  • B 255.255.254.0
  • C 255.255.255.0
  • D 255.255.255.255
Explanation

When the destination is the router’s own interface address, the routing table matches the local host route for that exact IP address. In the exhibit, GigabitEthernet0/0/0 has a local route of 10.10.10.3/32, and longest-prefix match selects that entry over the connected 10.10.10.0/24 network route or the default route. A /32 route uses the subnet mask 255.255.255.255.

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