AWS Certified Developer – Associate (DVA-C02) — Question 420

A company uses AWS to run its learning management system (LMS) application. The application runs on Amazon EC2 instances behind an Application Load Balancer (ALB). The application's domain name is managed in Amazon Route 53. The application is deployed in a single AWS Region, but the company wants to improve application performance for users all over the world.

Which solution will improve global performance with the LEAST operational overhead?

Answer options

• A. Set up an Amazon CloudFront distribution that uses the ALB as the origin server. Configure Route 53 to create a DNS alias record that points the application's domain name to the CloudFront distribution URL.
• B. Launch more EC2 instances behind the ALConfigure the ALB to use session affinity (sticky sessions). Create a Route 53 alias record for the ALB by using a geolocation routing policy.
• C. Create an AWS Client VPN endpoint in the VPInstruct users to connect to the VPN to access the application. Create a Route 53 alias record for the VPN endpoint. Configure Route 53 to use a geolocation routing policy.
• D. Deploy the application to multiple Regions across the world. Create a Route 53 alias record for the ALB by using a latency-based routing policy.

Correct answer: A

Explanation

Setting up an Amazon CloudFront distribution with the ALB as the origin is the most efficient way to reduce global latency because it caches and serves content from AWS edge locations closest to the users with minimal configuration. While a multi-region deployment (Option D) would also improve performance, it demands significantly higher operational overhead to manage multiple infrastructures and databases. Options B and C do not resolve global latency issues and add unnecessary complexity like requiring client VPN connections.