Notable Misconceptions

Answer - A.

For RTMP distributions, you cannot configure CloudFront to forward query string parameters to your origin.

Options B, C and D are true.

Amazon CloudFront is a content delivery network (CDN) offered by AWS that enables the delivery of content from AWS to end-users with low latency and high transfer speeds. CloudFront caches content in edge locations to reduce the load on the origin server and improve the end-user experience.

Cache behaviors in CloudFront are configurations that determine how CloudFront caches and delivers content to end-users. They can be configured based on URL patterns and request types. The behavior specifies how CloudFront handles the request and the response it receives from the origin.

The correct answer to the question is D. Don't forward query strings to the origin at all; then CloudFront doesn't cache based on query string parameters. This statement is not true because CloudFront can still cache content even if it doesn't forward query strings to the origin.

The other answer options are as follows:

A. For RTMP distributions, you can configure CloudFront to forward query string parameters to your origin. This statement is true. RTMP (Real-Time Messaging Protocol) is used for streaming media, and CloudFront allows you to configure cache behaviors to forward query string parameters to the origin.

B. Forward query strings to the origin and cache based on all parameters in the query string. This statement is also true. CloudFront allows you to forward all query string parameters to the origin and cache based on all the parameters in the query string.

C. Forward query strings to the origin and cache based on specified parameters in the query string. This statement is also true. CloudFront allows you to forward selected query string parameters to the origin and cache based on only those specified parameters in the query string.

In summary, CloudFront provides flexible caching configurations using cache behaviors that allow you to control how content is cached and delivered to end-users. You can choose to forward query string parameters to the origin or not, and you can cache content based on all parameters or specific ones in the query string.