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AWS Certified Solutions Architect - Professional · AWS
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Correct answer: C C. CloudFront + S3 for videos Correct because videos are large static content. S3 stores them cheaply and scales infinitely. CloudFront caches videos near users → reduces buffering and timeouts. Why others are wrong A. Enable EFS Max I/O Improves parallel throughput but adds latency. Still serving heavy video traffic from EFS, which is not ideal for video delivery. B. Instance store volumes Ephemeral storage (data lost when instance stops). Not shared between instances → not scalable for a web fleet. D. CloudFront → ALB CloudFront would still fetch videos from EC2/EFS, so the bottleneck remains. Less cost-efficient than S3 + CloudFront.
Configure an Amazon CloudFront distribution. Point the distribution to an S3 bucket, and migrate the videos from EFS to Amazon S3.
Move videos to Amazon S3 Set up CloudFront to serve them Continue using EC2 + ALB + EFS for blog pages, but offload heavy static content (videos). to S3/CloudFront.