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CLF-C02 practice question: Global infrastructure (1 of 2)

Cloud Technology and Services A free question from our original CLF-C02 practice exam. Try it, then open the answer to see why each option is right or wrong.

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An e-learning company stores course videos in one Amazon S3 bucket in a single AWS Region.

Students in Asia and South America report slow buffering.

The company wants copies of the videos cached close to students worldwide, while the bucket stays the source of the content.

What should it use?

Choose one answer.

  1. A. An Amazon CloudFront distribution that uses the S3 bucket as its origin
  2. B. A second copy of the bucket in a Region near Asia, used by students in Asia
  3. C. AWS Direct Connect links that connect each student's home network to the bucket
  4. D. An Auto Scaling group of web servers in the same Region as the bucket
Show the answer and explanation

Answer: A

  • A. Right: Correct. CloudFront caches copies of content at edge locations around the world and fetches from the origin, here the S3 bucket, when it needs them. Learn more: What is Amazon CloudFront? (opens in a new tab)
  • B. Wrong: One extra copy helps only the students near that Region, and the company must keep two buckets in step. It does not cache content close to students across the world.
  • C. Wrong: Direct Connect is a dedicated network link between a company's data center and AWS. Students' home networks cannot use it, and it does not cache videos.
  • D. Wrong: More servers in the same Region still sit far from students in Asia and South America. They add compute but do not place cached copies near viewers.

Explanation

CloudFront delivers content through edge locations around the world, caching copies near viewers and fetching from the origin when needed. The S3 bucket stays the source of the content. The other options either add capacity in one Region or are network links that do not cache content for public viewers.

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