SAP-C02 Question 350
Single answerA company has a multi-region application hosted in AWS. The application uses an Amazon EC2 instance in Region A to process video files stored in an Amazon S3 bucket in Region B. After processing, the video files are stored back into the S3 bucket in Region B. The company has noticed high data transfer costs. How can the company minimize data transfer costs while maintaining functionality?
- A
Move the EC2 instance to Region B where the S3 bucket is located.
- B
Enable S3 Transfer Acceleration for the S3 bucket in Region B.
- C
Use Amazon CloudFront to cache the video files in Region A.
- D
Enable cross-region replication on the S3 bucket to replicate data to Region A.
Show answer and explanation
Correct answer: A
Explanation
To minimize data transfer costs, the EC2 instance should be moved to the same region as the S3 bucket. This eliminates inter-region data transfer charges since data transfer within the same region between EC2 and S3 is free. Other options, such as S3 Transfer Acceleration, CloudFront, or cross-region replication, do not address the root cause of high inter-region transfer costs and may even increase costs in some cases.
- A. Correct.
This is correct. By moving the EC2 instance to Region B, data transfer costs will be minimized because the EC2 instance and the S3 bucket are in the same region. Data transfer within the same region between EC2 and S3 is free.
- B. Incorrect.
This is incorrect. S3 Transfer Acceleration is designed to speed up transfers over long distances to an S3 bucket, but it does not reduce inter-region data transfer costs.
- C. Incorrect.
This is incorrect. Amazon CloudFront is a content delivery network and is not suitable for reducing inter-region data transfer costs for direct interactions between an EC2 instance and an S3 bucket.
- D. Incorrect.
This is incorrect. Enabling cross-region replication would increase data transfer costs because it will replicate data between regions, which incurs additional inter-region transfer charges.