SAP-C02 Question 532
Select 3Your company runs a global e-commerce platform hosted on AWS. The application serves customers across multiple regions and uses an Amazon CloudFront distribution to deliver static and dynamic content. The backend consists of an Amazon S3 bucket for static assets in the us-east-1 region and an Amazon RDS database in the ap-southeast-1 region. The company is concerned about data transfer costs and wants to minimize these expenses without impacting performance. Which of the following strategies would help reduce networking and data transfer costs?
- A
Enable Amazon S3 Transfer Acceleration for the S3 bucket.
- B
Configure Amazon CloudFront to use Origin Shield.
- C
Replicate the Amazon RDS database to a read replica in us-east-1 and serve read requests locally.
- D
Enable cross-region S3 replication for the static assets.
- E
Use CloudFront Regional Edge Caches to cache content closer to users.
Show answer and explanation
Correct answers: B, C, E
Explanation
To minimize data transfer costs, it is essential to reduce the amount of traffic flowing between regions and between the origin and edge locations. Configuring Amazon CloudFront with Origin Shield decreases requests to the origin, while using CloudFront Regional Edge Caches ensures that content is cached closer to users, minimizing origin data transfer. Additionally, replicating the RDS database to a read replica in us-east-1 reduces cross-region traffic for read-heavy workloads. S3 Transfer Acceleration and cross-region replication, while useful in other scenarios, do not directly address cost reduction in this case.
- A. Incorrect.
Amazon S3 Transfer Acceleration improves upload speeds for global users but does not reduce data transfer costs. In fact, it may increase costs due to its additional pricing model.
- B. Correct.
Using Amazon CloudFront with Origin Shield reduces the number of requests to the origin by centralizing cache misses, thereby lowering data transfer costs from the origin.
- C. Correct.
Replicating the Amazon RDS database to a read replica in us-east-1 reduces inter-region data transfer costs for read requests, as cross-region database traffic is billed.
- D. Incorrect.
Cross-region S3 replication ensures data availability but increases data transfer costs due to replication traffic between regions.
- E. Correct.
CloudFront Regional Edge Caches store frequently accessed content closer to users, reducing origin fetches and data transfer costs from the origin.