CompTIA Network+ (N10-007) — Question 309

After several changes to the network, a technician needs to ensure a client is checking for new hostname and IP pairings. Which of the following commands should the technician use to force new lookups?

Answer options

• A. ipconfig /flushdns
• B. ipconfig /release
• C. ipconfig /renew
• D. ipconfig /all

Correct answer: A

Explanation

The correct command, ipconfig /flushdns, clears the DNS resolver cache, prompting the client to request new hostname and IP mappings. The other options do not achieve this; ipconfig /release and ipconfig /renew are used for DHCP leases, and ipconfig /all displays the current network configuration without forcing lookups.