CompTIA A+ Core 2 (220-1102) — Question 508

A change was introduced in the company's DNS server, but local workstations have not applied it yet. Which of the following commands should the help desk technician use to force the workstations to immediately apply the change?

Answer options

• A. nslookup
• B. netstat
• C. tracert
• D. ipconfig

Correct answer: D

Explanation

The correct answer is D, 'ipconfig', as this command can be used to refresh the DNS resolver cache on workstations, forcing them to recognize the new DNS settings. The other options do not serve this purpose: 'nslookup' is used for querying DNS records, 'netstat' displays network connections, and 'tracert' traces the route to a network destination.