Your company is planning to deliver content via an application hosted on a set of EC2 Instances. The end devices can be laptops, mobile devices, tablets etc. The content needs to be customized based on the type of end-user device. Which of the following can help fulfill this requirement, individually and separately, and ensure that cost is MINIMIZED and MAXIMUM ease of deployment?
Select 2 answers.

Answer options:

A.Application Load Balancers
B.Cloudfront with Lambda@Edge
C.Network Load Balancers
D.Appstream 2.0

Answer – A and B
Option C is incorrect since this is the wrong type of Load Balancer to use for this purpose.
Option D is incorrect since AppStream is the incorrect service to use for this requirement.
The Application Load balancers can be used to distribute the processing powers to different Instances based on the type of request.
The AWS Documentation mentions the following about Lambda@Edge which supports the requirement.
CloudFront can return different objects to viewers based on the device they`re using by checking the User-Agent header, which includes information about the devices. For example, CloudFront can return different images based on the screen size of their device.
For more information on Lambda@Edge, please refer to the below URL
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/lambda-at-the-edge.html