Host Misconfigured with the Wrong Default Gateway

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

Refer to the exhibit. Which configuration parameter is preventing host С from reaching the internet? - image

  1. IP address assignment
  2. IP network mask
  3. default gateway Correct Answer
  4. automatic DNS

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.

Community Insight

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.

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.

Community Discussion (3 comments)

exiledwl 👍 1 Selected: C
C is correct, The default gateway is currently set to Host A's address 192.168.1.1 and this must be adjusted
[Removed] 👍 2 Selected: 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.
379c9f6 👍 2
Given Answer is Correct! The default Gateway should be 192.168.1.254 (Router A G0/0/0 int)

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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

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