A team has an application which is a website. The team wants to test different versions of the website to the users without redirecting or changing the browser URL. In order to perform this kind of A/B testing, the team does not plan to modify any front-end or back-end code with additional logic. And it is supposed to put this logic to CDN network. What is the best place/service to implement the switching logic?

Answer options:

A.Weighted routing at Route53
B.Lambda@Edge
C.Global accelerator at CloudFront
D.Lambda and API Gateway

Correct Answer – B
Lambda@Edge can help perform A/B testing without the need to redirect or change the browser URL. For details, please refer to use cases of Lambda@Edge in
https://aws.amazon.com/lambda/edge/.
Option A is incorrect: Because this scenario needs to implement the logic in CDN network which should be in CloudFront.
Option B is CORRECT: Refer to the below explanation:-
Option C is incorrect: Global accelerator can provide high availability and superior performance however it cannot add logic with Lambda.
Option D is incorrect: Lambda@Edge should be chosen which is the service to add additional logic in order to perform A/B testing. This option is not accurate compared with Option
B.