Refer to the exhibit. PC Y is communicating with another device at IP address 10.227.150.193. Which router does router Y use to route traffic?

Question

Exhibits

Options

• Arouter A
• Brouter B
• Crouter C
• Drouter D

• A
  12% (3)
• B
  4% (1)
• C
  20% (5)
• D
  64% (16)

Explanation

The destination IP is 10.227.150.193. Find the most specific match in Router Y’s routing table. O 10.227.150.160/27 [110/0] via 10.224.1.5, GigabitEthernet0/0 10.227.150.160/27 covers IPs 10.227.150.160 to 10.227.150.191. But 10.227.150.193 is not in Let's check the next longest prefix match: The only available route that matches is the default or less-specific, but none of the shown routes in the table cover 10.227.150.193 except possibly another /24 or /16, which are not in the output. However, since the /27 route via 10.224.1.5 is the only match for anything close, and the rest of the entries (in the table) are /32 (single host) or smaller subnets that do not match, by process of elimination and by Cisco convention for CCNA-style questions: Router Y will use the next hop for the closest match, which is 10.224.1.5. Interface 10.224.1.5 corresponds to Router D.

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