EC2 instances in a private subnet frequently download large datasets from Amazon S3. The traffic currently routes through a NAT Gateway. The company's AWS bill shows high data processing charges for the NAT Gateway. How can a solutions architect eliminate these NAT Gateway costs?

Answer options:

Create an Interface VPC Endpoint for S3.

Create a Gateway VPC Endpoint for S3.

Move the EC2 instances to a public subnet.

Replace the NAT Gateway with a NAT Instance.

How to approach this question

Identify the cost source (NAT Gateway data processing). Gateway Endpoints for S3 are free.

Full Answer

B.Create a Gateway VPC Endpoint for S3.✓ Correct

A Gateway VPC Endpoint provides reliable connectivity to Amazon S3 without requiring an internet gateway or a NAT device. Crucially, Gateway endpoints are provided at no additional charge, eliminating the NAT Gateway data processing fees.

Common mistakes

Selecting Interface VPC Endpoint, which costs money per hour and per GB processed.

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