Refer to the exhibit

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Refer to the exhibit. Which prefix does Router I use for traffic to Host A?” 5 points Intex 10.10.11.0/30 1 10.10.10.023 10.10.12.0/30 . moutari Switch Host 30.10.13. 214 MPUS 2 OB Router1#show ip route Gateway of last resort is 10.10.11.2 to network 0.0.0.0 209.165.200.0/27 is subnetted, 1 subnets B 209.165.200.224 [20/0] via 10.10.122, 03:22.14 209.165.201.0/27 is subnetted, 1 subnets B 209.165.201.0 [20/0] via 10.10.12.2, 02:26:33 209.165.202.0/27 is subnetted, 1 subnets ? 209.165.202.128 (20/0] via 10.10.122, 02.26.03 10.0.0.0/8 is variably subnetted, 8 subnets, 4 masks 10.10.10.0/28 is directly connected, GigabitEthernet0/0 10.10.11.0/30 is directly connected, FastEthernet2/0 10.10. 12.0/30 is directly connected, GigabitEthernet0/1 10.10.13.0/25 (110/2] via 10 10.10.1, 00:00:04. GigabitEthernet0/0 10.10.13 128/28 [110/2] via 10.10.101, 00:00:04, GigabitEthernet0/0 10.10.13. 144/28 [110/2] via 10.10.10 1,00 00:04. GigabitEthernet0/0 10.10.13. 160/29 (110/2] via 10.10.101, 00 00 04, GigabitEthernet0/0 10.10 13.208/29 [110/2] via 10.10.10.1, 00:00:04. GigabitEthernet0/0 0.0.0.0/0 [1/0] via 10.10.112 OOOOOOOO

The correct answer and explanation is:

Correct Answer:
Router I uses the prefix 10.10.13.0/25 for traffic to Host A.

Explanation:

The routing table provided gives us critical details about the prefixes and their associated paths. Let’s break it down to understand why 10.10.13.0/25 is the correct prefix for traffic destined to Host A:

  1. Host A’s Location:
    The subnet 10.10.13.0/25 indicates a network range from 10.10.13.0 to 10.10.13.127 (based on a /25 subnet mask, which uses 128 addresses). Since Host A falls within this range, the router uses this prefix to direct traffic to Host A.
  2. Routing Table Analysis:
    • The table lists 10.10.13.0/25 as a route with an administrative distance (AD) of 110 and a metric of 2. It is learned via a dynamic routing protocol, indicated by the [110/2].
    • This route points to the next-hop IP address 10.10.10.1 through interface GigabitEthernet0/0.
    • This is the most specific match for any destination IP in the range 10.10.13.0 to 10.10.13.127.
  3. Default Gateway:
    The default route 0.0.0.0/0 is available and directs traffic to 10.10.11.2. However, the router uses the most specific match in the routing table (longest prefix match). Since 10.10.13.0/25 is more specific than the default route, it will be chosen.
  4. Other Routes:
    The remaining subnets in the table (10.10.13.128/28, 10.10.13.144/28, etc.) cover different portions of the 10.10.13.x network but do not overlap with Host A’s IP range. Hence, they are not selected.

In summary, Router I selects 10.10.13.0/25 as the best match because it covers Host A’s IP address with the longest prefix match, ensuring efficient and correct routing.

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