CompTIA A+ Core 2 (220-1102) — Question 177

A user is unable to access a web-based application. A technician verifies the computer cannot access any web pages at all. The computer obtains an IP address from the DHCP server. Then, the technician verifies the user can ping localhost, the gateway, and known IP addresses on the internet and receive a response. Which of the following is the MOST likely reason for the issue?

Answer options

• A. A firewall is blocking the application.
• B. The wrong VLAN was assigned.
• C. The incorrect DNS address was assigned.
• D. The browser cache needs to be cleared.

Correct answer: C

Explanation

The most likely cause of the issue is that the incorrect DNS address was assigned, leading to the inability to resolve web addresses despite having an IP address and connectivity. The other options are less likely because the user can ping both the gateway and external IPs, indicating that basic network connectivity is functioning correctly.