Question 380
A deployed environment still does not meet the original requirement: An application accesses S3 heavily from private VPC subnets and pays large NAT Gateway processing charges for those requests. What design flaw is the best match for the reported condition?
Explanation
Correct Answer
This is the technical design error aligned with the unmet requirement. Gateway endpoints can avoid NAT traversal for eligible S3 and DynamoDB traffic. The appropriate correction is: Add an S3 gateway VPC endpoint and route supported S3 traffic privately rather than through NAT. The control should then be tested by verifying that NAT processed-byte charges for eligible S3 traffic fall while S3 requests still succeed under endpoint policy.
Incorrect Answers
The CDN forwards every request to origin due to ineffective cache keys or caching headers. The stated evidence instead indicates: S3 calls egress through NAT because no supported endpoint route was configured.
Stable compute baseline is paid at on-demand rates without analyzed commitments. The stated evidence instead indicates: S3 calls egress through NAT because no supported endpoint route was configured.
Single-AZ database storage and compute are a single zonal failure domain. The stated evidence instead indicates: S3 calls egress through NAT because no supported endpoint route was configured.