CompTIA Network+ (N10-008) — Question 739

A network engineer needs to change an entire subnet of SLAAC-configured workstation addresses. Which of the following methods would be the best for the engineer to use?

Answer options

• A. Change the address prefix in ARP in order for the workstations to retrieve their new addresses.
• B. Change the address prefix in a router in order for the router to advertise the new prefix with an ND.
• C. Change the address prefix scope in a DHCP server in order for the workstations to retrieve their new addresses.
• D. Change the workstations’ address prefix manually because an automated method does not exist.

Correct answer: B

Explanation

The correct answer is B because changing the address prefix on the router allows it to send out the new prefix via Neighbor Discovery (ND), enabling SLAAC-configured devices to update their addresses automatically. Option A is incorrect as ARP is not used for address prefix updates in SLAAC. Option C is also wrong because DHCP does not apply to SLAAC configurations, and option D is not ideal since it requires manual intervention rather than leveraging the automated capabilities of SLAAC.