User Internet Connection Troubleshooting

Diagnosing Internet Connection Issues

Question

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?

Answers

Explanations

Click on the arrows to vote for the correct answer

A. B. C. D.

B.

The issue described in the scenario is that the user is unable to browse the internet after returning from vacation, and the technician is unable to ping any external websites by their name, but is able to ping them by their IP address. This indicates a possible DNS (Domain Name System) resolution issue. DNS is responsible for translating domain names (such as www.google.com) into IP addresses that computers can understand.

The correct answer to resolve this issue is B. ipconfig /flushdns. The ipconfig command is used to view and manage network settings on Windows operating systems. The /flushdns parameter clears the DNS resolver cache, which stores the IP addresses of recently accessed websites. By clearing the DNS resolver cache, the computer will have to perform a fresh DNS lookup when accessing a website, which may resolve any issues related to outdated or incorrect DNS information.

Option A (ipconfig /all) displays all network configuration information, but it is unlikely to resolve the issue described in the scenario.

Option C (ipconfig /release) releases the IP address leased by the DHCP server, which is not relevant to this issue.

Option D (ipconfig /setclassid) sets the DHCP class ID (identifier) for a network adapter, which is also not relevant to this issue.

Therefore, the correct answer is B. ipconfig /flushdns.