Medium1 markMultiple Choice
Domain 4.4: Network Cost OptimizationCloudFrontData TransferCost Optimization

AWS SAA-C03 · Question 65 · Domain 4.4: Network Cost Optimization

A company hosts a media-heavy website on EC2 instances behind an Application Load Balancer (ALB). The company is experiencing high AWS monthly bills due to 'Data Transfer Out to Internet' charges.<br/><br/>Which AWS service should be implemented to significantly reduce these data transfer costs?

Answer options:

A.

AWS Global Accelerator

B.

Amazon CloudFront

C.

Amazon ElastiCache

D.

AWS Transit Gateway

How to approach this question

Identify the service that caches content and reduces origin data transfer.

Full Answer

B.Amazon CloudFront✓ Correct
Amazon CloudFront
Amazon CloudFront is a CDN. Data transfer from AWS origins (like EC2, ALB, or S3) to CloudFront is free. By caching content at the edge, CloudFront serves requests directly to users, drastically reducing the 'Data Transfer Out' from the EC2 instances/ALB.

Common mistakes

Not realizing that data transfer from AWS origins to CloudFront is free.

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