200-301 Question 367
Single answerA small office network is configured to use DHCP and DNS. A user reports that they cannot access websites using domain names, but they can successfully access websites using IP addresses. What is the MOST likely cause of the issue?
- A
The DHCP server is not assigning IP addresses to the clients.
- B
The DNS server address provided by the DHCP server is incorrect.
- C
The DHCP lease time is too short, causing frequent IP address changes.
- D
The client's subnet mask is incorrectly configured.
Show answer and explanation
Correct answer: B
Explanation
The Domain Name System (DNS) translates domain names into IP addresses. If the DNS server address configured on the client is incorrect, domain name resolution will fail. In this scenario, the user is able to access websites using IP addresses, so the issue is specifically related to DNS name resolution. DHCP plays a role here because it assigns the DNS server address to the client. If the DHCP server provides an incorrect DNS server address, this will lead to the issue described.
- A. Incorrect.
If the DHCP server were not assigning IP addresses, the user would not be able to connect to the network at all, making this option incorrect.
- B. Correct.
If the DNS server address provided by the DHCP server is incorrect, the client will not be able to resolve domain names to IP addresses, which matches the scenario described in the question.
- C. Incorrect.
The DHCP lease time being too short might cause some disruptions, but it would not prevent domain name resolution if the DNS configuration is correct. Thus, this is not the most likely cause.
- D. Incorrect.
An incorrect subnet mask could cause communication issues, but it would not specifically result in domain name resolution problems.