DVA-C02 Question #454: Real Exam Question with Answer & Explanation

Question

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?

Options

• ASet up an Amazon CloudFront distribution that uses the ALB as the origin server. Configure
• BLaunch more EC2 instances behind the ALConfigure the ALB to use session affinity (sticky
• CCreate an AWS Client VPN endpoint in the VPInstruct users to connect to the VPN to access the
• DDeploy the application to multiple Regions across the world. Create a Route 53 alias record for

Explanation

Amazon CloudFront caches content at edge locations worldwide, reducing latency for global users without requiring multi-region infrastructure.

Common mistakes.

• B. Adding more EC2 instances and enabling sticky sessions improves availability and session handling but does not reduce latency for geographically distant users.
• C. AWS Client VPN routes user traffic through the VPC, which would increase latency for global users rather than improve performance.
• D. Deploying to multiple regions and configuring Route 53 latency-based routing achieves the goal but introduces significant operational overhead including managing deployments, databases, and configurations across regions.

Concept tested. CloudFront distribution with ALB origin for global performance

Reference. https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/distribution-working-with.html

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