Host Misconfigured with the Wrong Default Gateway

200-301 By islever Editorial Last updated

Verify IP parameters for Client OS (Windows, Mac OS, Linux)

Short answer

C Host C's default gateway is wrongly set to Host A's address (192.168.1.1) instead of the router (192.168.1.254), so it cannot reach the internet.

Question

Refer to the exhibit. Which configuration parameter is preventing host С from reaching the internet? - Exhibit: Host Misconfigured with the Wrong Default Gateway
  1. IP address assignment
  2. IP network mask
  3. default gateway Correct Answer
  4. automatic DNS

Key Takeaways

Off-subnet (internet) traffic needs the router's address as the default gateway; pointing it at a fellow host breaks all external connectivity while local subnet comms still work.

A host reaches remote networks only through its default gateway (the local router). If the gateway is misconfigured to another host's IP, off-subnet traffic has no valid next hop and fails. The host's own IP, mask, and DNS are valid here.

Common mistake: Blaming IP address or mask (A/B): those are valid and within the subnet. DNS (D) would only break name resolution, not all internet reachability.

Expert Analysis

Why the Answer Is Correct

C is correct. The exhibit shows Host C's default gateway set to Host A's address (192.168.1.1) rather than the router interface (192.168.1.254). With no valid gateway, Host C cannot route traffic off its subnet to the internet.

Why the Other Options Are Wrong

A is wrong: Host C has a valid, unique IP in the subnet. B is wrong: its subnet mask matches the other hosts. D is wrong: automatic DNS is functioning; the failure is reachability, not name resolution.

Community Comment Notes

The vote is C (100). Commenters note the gateway should be 192.168.1.254 (Router A G0/0/0) and that it is currently set to Host A's address.

Official Reference

https://learningnetwork.cisco.com/s/ccna-exam-topics

This link opens the official vendor documentation in a new tab.

Community Votes

C
100%

100% of anonymous learners picked answer C. Votes are pick records left by other test-takers — they are not the verified answer.

Discussion 3 contributions

Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.

From public community threads 3

  1. [Removed] 👍 2 Answered C
    A. IP address assignment Host С is using a valid and unique IP address inside its subnet. Wrong answer. B. IP network mask Host С is using the same subnet mask as any other host inside its subnet. Wrong answer. C. default gateway Host С must be configured with the IP address of the default gateway it uses to send traffic to the Internet. This address is 192.168.1.254 (Router A, interface G0/0/0) and not 192.168.1.1 as shown in the exhibit. Correct answer. D. automatic DNS ? Wrong answer.
  2. 379c9f6 👍 2
    Given Answer is Correct! The default Gateway should be 192.168.1.254 (Router A G0/0/0 int)
  3. exiledwl 👍 1 Answered C
    C is correct, The default gateway is currently set to Host A's address 192.168.1.1 and this must be adjusted

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