A global stock brokerage firm is developing a new stock application for its global customers. The application would be deployed on a fleet of EC2 instances in the Auto-scaling Group. This stateful application uses UDP for traffic between users to servers. Since this application would be used for stock trading by high profile users, the CTO of this firm requires this application to be highly available & there should not be any performance degradation for global users. For audit purposes, all client IP addresses accessing this application should be preserved.
Which of the following can be deployed to meet this requirement?

Answer options:

A.Create AWS Global Accelerator with Elastic IP as an endpoint.
B.Create AWS Global Accelerator with Classic Load balancer as an endpoint.
C.Create AWS Global Accelerator with EC2 instance as an endpoint.
D.Create AWS Global Accelerator with Application Load Balancer as an endpoint.

Correct Answer – C
For high performance & High availability of applications, AWS Global Accelerator can be used. Since the client is deploying a Stateful application, client affinity needs to be enabled for a listener to forward traffic from the user IP address to the same endpoint resource. This EC2 Instance can be used as an endpoint that also supports UDP & client IP preservation.
Option A is incorrect as with Elastic IP address as an endpoint for AWS Global accelerator, client IP address preservation is not supported.
Option B is incorrect as CLB does not support UDP traffic.
Option D is incorrect as ALB does not support UDP traffic.
For more information on AWS Global Accelerator, refer to the following URLs
https://aws.amazon.com/blogs/networking-and-content-delivery/updating-aws-global-accelerator-ec2-endpoints-based-on-autoscaling-group-events/
 https://docs.aws.amazon.com/global-accelerator/latest/dg/about-listeners-client-affinity.html