AWS Certified Solutions Architect – Associate (SAA-C02) — Question 291

A company wants to improve the availability and performance of its stateless UDP-based workload. The workload is deployed on Amazon EC2 instances in multiple AWS Regions.
What should a solutions architect recommend to accomplish this?

Answer options

• A. Place the EC2 instances behind Network Load Balancers (NLBs) in each Region. Create an accelerator using AWS Global Accelerator. Use the NLBs as endpoints for the accelerator.
• B. Place the EC2 instances behind Application Load Balancers (ALBs) in each Region. Create an accelerator using AWS Global Accelerator. Use the ALBs as endpoints for the accelerator.
• C. Place the EC2 instances behind Network Load Balancers (NLBs) in each Region. Create an Amazon CloudFront distribution with an origin that uses Amazon Route 53 latency-based routing to route requests to the NLBs.
• D. Place the EC2 instances behind Application Load Balancers (ALBs) in each Region. Create an Amazon CloudFront distribution with an origin that uses Amazon Route 53 latency-based routing to route requests to the ALBs.

Correct answer: A

Explanation

AWS Global Accelerator and Network Load Balancers (NLBs) support UDP traffic, making Option A the correct choice for improving the performance and availability of UDP-based workloads. Application Load Balancers (ALBs) and Amazon CloudFront do not support UDP traffic, which eliminates Options B, C, and D. Therefore, using AWS Global Accelerator with NLBs as endpoints is the only viable architecture for this UDP workload.