CLF-C02 - Cloud Technology and Services - Section 3.3

Explain how to achieve high availability using multiple Availability Zones and describe the benefits of edge services such as Amazon CloudFront and AWS Global Accelerator.

Explain how spreading resources across multiple Availability Zones in a Region protects against data centre failures and supports high availability. Recognise Amazon CloudFront as a content delivery network that caches at edge locations to cut latency, and AWS Global Accelerator as a service routing traffic over the AWS backbone to improve global performance.

High availabilityMultiple Availability ZonesAmazon CloudFrontAWS Global Accelerator

Practice question for this objective

Free sampleCloud Technology and Servicesmedium

A global company is reviewing how AWS edge services can improve the experience of users far from its hosting Region. Which TWO statements correctly describe a benefit that an AWS edge service provides? (Select TWO.)

  • AAmazon CloudFront caches copies of content at edge locations so nearby viewers receive it with lower latency. Correct
  • BAWS Global Accelerator routes traffic over the AWS network to the nearest healthy Region using fixed static IP addresses. Correct
  • CAmazon CloudFront removes the need for multiple Availability Zones because the edge network itself provides high availability.
  • DAWS Global Accelerator stores application objects durably at the edge so they survive without an origin Region.
  • EAmazon CloudFront encrypts the application's database records at rest within each edge location automatically.
AWS edge services improve global performance: CloudFront caches content near viewers, and Global Accelerator routes traffic over the AWS network to the nearest healthy Region with static IPs. Edge services sit at AWS edge locations to bring traffic closer to users; CloudFront returns cached content from a nearby edge to cut latency, and Global Accelerator places traffic on the AWS backbone toward the closest healthy endpoint with static IPs, neither of which replaces multi-AZ design, durable storage, or at-rest encryption.

Why A is correct: CloudFront is a content delivery network that serves cached copies from edge locations close to viewers, which is its core latency benefit.

Why B is correct: Global Accelerator sends user traffic onto the AWS backbone toward the closest healthy endpoint and offers static anycast IPs, improving performance and failover.

Why C is wrong: Edge caching speeds delivery but does not protect the origin tiers, so multiple Availability Zones are still needed for high availability.

Why D is wrong: Durable object storage is the role of Amazon S3, not Global Accelerator, which directs network traffic rather than holding stored data.

Why E is wrong: Encrypting stored database data is handled by services such as AWS KMS with the database, not by CloudFront, which caches and delivers web content.

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