The VoIP application runs on an Amazon EC2 instance with more than enough resources.

AWS Global Accelerator is a service that improves global application availability and performance using the AWS global network. It supports both TCP and UDP protocols and provides optimized routing and lower latency for real-time applications such as VoIP, regardless of where the user is located globally.

AWS Documentation Extract:

"AWS Global Accelerator uses the AWS global network to optimize the path to your application endpoints, improving performance for TCP and UDP traffic, such as VoIP."

(Source: AWS Global Accelerator documentation)

B: CloudFront accelerates HTTP/S content, not TCP/UDP.

C: Route 53 geoproximity routing is for DNS-based routing, not for traffic acceleration.

D: Network Load Balancers support TCP/UDP, but do not address global latency or provide acceleration.