SOA-C03 Question #154: Real Exam Question with Answer & Explanation

Question

A company has created a new video-on-demand (VOD) application. The application runs on a fleet of Amazon EC2 instances behind an Application Load Balancer (ALB). The company configured an Amazon CloudFront distribution and set the ALB as the origin. Because of increasing application demand, the company wants to move all video files to a central Amazon S3 bucket. A SysOps administrator needs to ensure that video files can be cached at edge locations after the company migrates the files to Amazon S3. Which solution will meet this requirement?

Options

• AConfigure CloudFront to send the X-Forwarded-For header to the origin and to redirect video
• BConfigure a new CloudFront cache behavior to route to Amazon S3 as a new origin, based on
• CConfigure URL signing in the CloudFront distribution by using a custom policy. Ensure that video
• DConfigure a CloudFront origin group. Specify the required HTTP status codes to direct connection

Explanation

To ensure video files are cached at CloudFront edge locations after migrating the files to Amazon S3, CloudFront must be able to fetch those video objects directly from S3 as an origin. The most operationally straightforward pattern is to add S3 as a second origin and create a separate cache behavior that routes requests for video paths (for example, /video/* or /*.mp4) to the S3 origin. With this configuration, CloudFront caches the S3-served objects at edge locations according to the cache policy/headers, while the existing ALB origin continues serving dynamic application paths. This isolates static media delivery from the application tier and improves performance by maximizing cache hits at the edge.

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