A company serves a popular mobile app that downloads large media files. The files are stored in an S3 bucket in us-east-1. The company is seeing high 'Data Transfer Out to Internet' costs on their AWS bill. What is the MOST cost-effective way to reduce these data transfer costs?

Answer options:

Enable S3 Transfer Acceleration.

Implement Amazon CloudFront to serve the media files.

Move the S3 bucket to a different AWS Region.

Use a NAT Gateway to route the traffic.

How to approach this question

Recognize that CloudFront reduces data transfer costs because S3 to CloudFront transfer is free, and CloudFront internet transfer rates are often lower.

Full Answer

B.Implement Amazon CloudFront to serve the media files.✓ Correct

Implement Amazon CloudFront to serve the media files.

Amazon CloudFront caches content at edge locations. Data transfer from AWS origins (like S3) to CloudFront is free. You only pay for the data transfer from CloudFront to the internet, which is often cheaper.

Common mistakes

Assuming adding a CDN always increases costs. In AWS, it often decreases costs for heavy outbound data.

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