Question 32
Domain 3: Cloud Technology and ServicesAWS has created a large number of Edge Locations as part of its Global Infrastructure. Which of the following is NOT a benefit of using Edge Locations?
Correct answer: C
Explanation
Edge locations are part of CloudFront’s CDN, which “provides low latency for content delivery” by caching content near users. They are not used to “distribute traffic across multiple instances”; that is the role of Elastic Load Balancing, which “distribute[s] network traffic to improve application scalability.”
Why each option is right or wrong
A. Edge locations are used by CloudFront to cache the most recent responses.
B. Edge locations are used by CloudFront to improve your end users' experience when uploading files.
C. Edge locations are used by CloudFront to distribute traffic across multiple instances to reduce latency.
CloudFront edge locations are part of the CDN layer and are used to cache static and dynamic content close to users to reduce latency, as described in the CloudFront Developer Guide. The statement about distributing traffic across multiple instances describes Elastic Load Balancing, which is the AWS service that distributes network traffic to improve application scalability; ELB is not an edge-location function under the CloudFront service model.
D. Edge locations are used by CloudFront to distribute content to global users with low latency.