Fictional Corp has a DNS server running within its VPC. It plans to move an application server to a different VPC. Which step is appropriate during this move?

• A. Remove DNS entries within the VPC that are no longer relevant
• B. Update DNS A records to point to the new IP
• C. Recreate the DNS server in the new VPC
• D. Migrate DNS zone files to the new VPC

Answer: (A)

When moving an application to a different VPC, the DNS records in the original VPC that point to the old endpoint become obsolete. Removing those entries prevents clients from resolving the service name to an IP that no longer hosts the application, which helps avoid failed connections during the transition.

After cleanup, you would typically establish proper DNS for the new location (such as creating or updating records to the new IP) once the new endpoint is ready. Recreating the DNS server or migrating zone files can be part of a broader migration plan, but the immediate and essential step during the move is to prune out the stale entries so DNS doesn’t misdirect traffic.