300-445 Question 192
Single answerAn employee reports that they are unable to access a web-based application hosted on the internet. You collect the following data: their device is connected to the local wireless network, the default gateway is reachable, the DNS server responds to pings, and the VPN gateway is not in use. However, when attempting to resolve the application's domain name, the resolution fails. Which of the following is the most likely cause of the issue?
- A
The wireless network is experiencing packet loss.
- B
The DNS server is misconfigured or unable to resolve the domain name.
- C
The default gateway is incorrectly routing traffic to the internet.
- D
The application server is rejecting connections from the user's device.
Show answer and explanation
Correct answer: B
Explanation
Based on the collected data, the user's device can communicate with the local network, the default gateway, and the DNS server. However, the failure occurs during the domain name resolution step, pointing to a DNS-related issue. This could be due to a misconfiguration or an inability of the DNS server to resolve the specific domain name, which aligns with the symptoms described.
- A. Incorrect.
If the wireless network was experiencing packet loss, it would likely result in intermittent connectivity issues, not a consistent failure to resolve domain names.
- B. Correct.
A failure to resolve the domain name typically indicates an issue with the DNS server, such as a misconfiguration or inability to perform name resolution.
- C. Incorrect.
The default gateway is reachable, which suggests it is functioning correctly in routing traffic. This makes it unlikely to be the cause of the issue.
- D. Incorrect.
The problem described involves domain name resolution, not connectivity to the application server. Therefore, server rejection is not the most likely cause.