AWS Certified Advanced Networking – Specialty (ANS-C01)Network DesignMedium
A global enterprise is deploying a new web application that requires extremely low latency for users worldwide. The application backend is hosted in EC2 instances behind an Application Load Balancer (ALB) in multiple AWS Regions (e.g., N. Virginia, Ireland, Sydney). The enterprise wants to ensure that users are always directed to the closest healthy endpoint, bypassing potential internet congestion. Which AWS service is best suited to achieve this goal?
- AAWS CloudFront
- BAWS Global Accelerator
- CAmazon Route 53 with Latency Routing Policy
- DAWS Transit Gateway
Show answer & explanationAnswer & explanation
Correct answer: B. AWS Global Accelerator
AWS Global Accelerator uses the AWS global network infrastructure to route user traffic to the closest healthy endpoint, bypassing internet congestion and improving performance. It provides static IP addresses as entry points, which remain fixed, and directs traffic to application endpoints (like ALBs) in different regions, optimizing for latency and availability.
Why the other options are wrong
- A. AWS CloudFront is a Content Delivery Network (CDN) primarily for caching static and dynamic content at edge locations, not for routing dynamic application traffic to backend ALBs over the AWS global network.
- C. Route 53 Latency Routing routes users via DNS to the lowest latency region, but traffic still traverses the public internet, which can be subject to congestion.
- D. AWS Transit Gateway is for connecting VPCs and on-premises networks within AWS, not directly for optimizing end-user access to global web applications.
AWS Global Accelerator
A networking service that improves the availability and performance of applications with users distributed globally by directing traffic to optimal endpoints over the AWS global network.
- Provides static Anycast IP addresses as entry points.
- Routes traffic to the closest healthy regional endpoint.
- Uses the AWS global network backbone for traffic acceleration.
- Supports various endpoint types, including ALBs, NLBs, and EC2 instances.
Memory trick: Global Accelerator: Accelerate your global reach with AWS's superhighway.