What is the MOST cost-effective way for the company to avoid Regional data transfer charges?

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In: SAA-C03
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A company runs a highly available image-processing application on Amazon EC2 instances in a single VPC.The EC2 instances run inside several subnets across multiple Availability Zones.The EC2 instances do not communicate with each other.However, the EC2 instances download images from Amazon S3 and upload images to Amazon S3 through a single NAT gateway.The company is concerned about data transfer charges.

What is the MOST cost-effective way for the company to avoid Regional data transfer charges?

Launch the NAT gateway in each Availability Zone.

Replace the NAT gateway with a NAT instance.

Deploy a gateway VPC endpoint for Amazon S3.

Provision an EC2 Dedicated Host to run the EC2 instances.

Explanations:

Launching a NAT gateway in each Availability Zone would increase costs due to multiple NAT gateways, which doesn’t effectively reduce data transfer charges.

Replacing the NAT gateway with a NAT instance may lower some costs, but it does not eliminate Regional data transfer charges and may introduce other overheads.

Deploying a gateway VPC endpoint for Amazon S3 allows EC2 instances to access S3 directly without going through the NAT gateway, thus avoiding Regional data transfer charges entirely.

Provisioning an EC2 Dedicated Host does not impact data transfer charges and is generally more expensive, making it an ineffective solution for

2025-10-09

1 Comment

  1. Bobby
    Author

    As I understand it, the answer is:
    Deploy a gateway VPC endpoint for Amazon S3.

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