A company provides a Voice over IP (VoIP) service using UDP connections on Amazon EC2 instances in an Auto Scaling group deployed across multiple AWS Regions. The company needs to route users to the Region with the lowest latency and provide automated failover between Regions. Which solution meets these requirements?
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Correct answer: Deploy a Network Load Balancer (NLB) and an associated target group, associate the target group with the Auto Scaling group, and use the NLB as an AWS Global Accelerator endpoint in each Region..
Why this is the answer
The correct solution uses AWS Global Accelerator with Network Load Balancers (NLBs). Global Accelerator provides static IP addresses that act as a fixed entry point to your application, routing user traffic to the optimal AWS Region based on latency and providing automatic failover. NLBs are essential because they support UDP traffic, which is required for VoIP services. ALBs (Application Load Balancers) do not support UDP. Route 53 latency records alone would provide latency-based routing but lack the automatic failover capabilities and static IP benefits of Global Accelerator for improved performance and reliability. CloudFront is a Content Delivery Network (CDN) and is not designed for direct routing of dynamic, real-time VoIP traffic between regions.
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