CompTIA A+ Core 1 (220-1001) — Question 24

A user is no longer able to browse the Internet after returning from vacation. The user is able to log in and navigate to the local intranet, but not to any outside sites. A technician pings a well-known website by name but gets no reply. The technician then pings its IP address and gets a reply.
Which of the following commands will MOST likely resolve the issue?

Answer options

Correct answer: B

Explanation

The command 'ipconfig /flushdns' clears the DNS resolver cache, which may contain outdated or incorrect entries that prevent name resolution for external sites. The other options do not address DNS issues; 'ipconfig /all' displays network configuration, 'ipconfig /release' releases the DHCP lease, and 'ipconfig /setclassid' sets the DHCP class ID, none of which directly resolve DNS problems.