300-445 Question 188
Select 2A user reports that they are unable to access any websites despite being connected to the corporate Wi-Fi. You collect diagnostic data and observe the following:
- The device has a valid IP address and subnet mask.
- The default gateway is unreachable when pinged.
- DNS resolution fails for any domain name.
- No VPN is active on the device.
Which of the following could be the root cause of the issue?
- A
The default gateway is misconfigured or down.
- B
The DNS server settings on the device are incorrect.
- C
The VPN gateway is blocking traffic.
- D
The user's wireless connection is unstable.
- E
A proxy server configuration is preventing outbound connections.
Show answer and explanation
Correct answers: A, B
Explanation
The inability to reach the default gateway suggests an issue with forwarding traffic to external networks, while the DNS resolution failure points to incorrect DNS server settings. These two issues together explain why the user cannot access websites. The absence of an active VPN, stable wireless connectivity, and no mention of a proxy server rules out the other options.
- A. Correct.
If the default gateway is unreachable, the device cannot forward traffic to external networks, which is critical for accessing websites.
- B. Correct.
If DNS server settings are incorrect, the device will fail to resolve domain names, which aligns with the observed DNS resolution failure.
- C. Incorrect.
The data indicates that no VPN is active on the device, so the VPN gateway cannot be responsible for the issue.
- D. Incorrect.
The user is connected to the corporate Wi-Fi, and the question does not mention instability in the wireless connection.
- E. Incorrect.
There is no evidence in the diagnostic data or scenario indicating the involvement of a proxy server.