Delivering Content Efficiently: AWS Cloudfront and S3 Bucket Integration
Question
Your management plans to use AWS Cloudfront to speed up the distribution of content to users from an S3 bucket.
They are worried about whether users will get the ideal response when they request for objects from Cloudfront.
What would you communicate to them as to how users would get content from Cloudfront?
Answers
Explanations
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A. B. C. D.Answer - C.
The AWS Documentation mentions the following which is done in case the files are not present in the Edge location.
In the edge location, CloudFront checks its cache for the requested files.
If the files are in the cache, CloudFront returns them to the user.
If the files are not in the cache, it does the following.
a.
CloudFront compares the request with the specifications in your distribution and forwards the request for the files to the applicable origin server for the corresponding file type-for example, to your Amazon S3 bucket for image files and your HTTP server for the HTML files.
b.The origin servers send the files back to the CloudFront edge location.
c.
As soon as the first byte arrives from the origin, CloudFront begins to forward the files to the user.
CloudFront also adds the files to the cache in the edge location for the next time someone requests those files.
Options A and D are incorrect since when Cloudfront receives the first bytes, it is delivered to the user.
Option B is incorrect since an Edge location will deliver the content.
For more information on how Cloudfront works, please visit the following URL:
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/HowCloudFrontWorks.htmlWhen using AWS CloudFront to speed up content delivery, users will receive content from CloudFront's cache rather than directly from the S3 bucket. CloudFront is a content delivery network that caches content at edge locations, so that the content can be served more quickly to end users.
When a user requests content from CloudFront, CloudFront determines which edge location is closest to the user and retrieves the content from the S3 bucket. The content is then cached at the edge location, so that future requests for the same content can be served directly from the cache.
The behavior of CloudFront in response to a user request for content depends on several factors, including the TTL (time-to-live) of the content in the cache, the status of the edge location, and the origin server.
Option A is not correct because CloudFront does not wait for the entire object to be available before sending it to the user. CloudFront begins sending the object as soon as the first byte arrives from the origin.
Option B is also incorrect. When a user requests content from CloudFront, the request is not directed to the origin location to retrieve the content. CloudFront retrieves the content from the origin and caches it at the edge location.
Option C is correct. As soon as the first byte of the requested content arrives from the origin, CloudFront begins to forward the content to the user. This helps to ensure a fast end-user experience.
Option D is incorrect. If CloudFront cannot retrieve the requested content from the origin, it will respond with an HTTP 502 (Bad Gateway) error, not an HTTP 404 (Not Found) error.
In summary, when a user requests content from CloudFront, CloudFront retrieves the content from the origin and caches it at the edge location closest to the user. As soon as the first byte of the content arrives from the origin, CloudFront begins to forward the content to the user to ensure a fast end-user experience.
