AWS Certified Advanced Networking – Specialty (ANS-C01)Network Management and OperationsMedium
A company is deploying a new web application that requires high availability and low latency, distributed across multiple AWS regions. They need to ensure that users are always routed to the nearest healthy application endpoint. The networking team wants to implement a solution that automatically performs health checks and shifts traffic away from unhealthy endpoints without manual intervention. Which AWS service is most appropriate for this requirement?
- AAWS Global Accelerator with endpoint groups
- BAmazon CloudFront with origin failover
- CApplication Load Balancer (ALB) with cross-zone load balancing
- DAmazon Route 53 with CNAME records
Show answer & explanationAnswer & explanation
Correct answer: A. AWS Global Accelerator with endpoint groups
AWS Global Accelerator improves application availability and performance for global users by directing traffic to optimal healthy endpoints. It uses static IP addresses as entry points, and its health checks automatically reroute traffic to the next best healthy endpoint across regions, ensuring high availability and low latency.
Why the other options are wrong
- B. CloudFront is a Content Delivery Network (CDN) that caches content at edge locations. While it supports origin failover, its primary purpose is content delivery, not accelerating dynamic application traffic or providing network-layer global load balancing for application endpoints.
- C. An Application Load Balancer operates within a single region and distributes traffic to targets within its registered Availability Zones. It does not provide global traffic acceleration or cross-region failover based on network health checks.
- D. Route 53 CNAME records are for canonical name mapping and do not inherently provide global traffic acceleration or automatic health-check-based failover across regions at the network layer.
AWS Global Accelerator
A networking service that improves the availability and performance of your applications with local and global users by directing traffic to optimal healthy endpoints.
- Uses static IP addresses
- Routes traffic to nearest healthy endpoint
- Automatic health checks and failover across regions
Memory trick: Global Accelerator: Your global traffic cop, always finding the fastest healthy route.