SAP-C02 Question 127
Single answerA company is running a web application with a global user base. The application is hosted on Amazon EC2 instances behind an Application Load Balancer (ALB). The company has observed significant latency issues for users in regions far from the primary AWS Region where the application is hosted. To improve the user experience, you are tasked with designing a solution that minimizes latency and ensures high availability while avoiding significant application changes. Which solution should you implement?
- A
Deploy the application to multiple AWS Regions and use Amazon Route 53 latency-based routing to direct users to the nearest Region.
- B
Use Amazon CloudFront to cache the application content at edge locations to reduce latency for global users.
- C
Migrate the application to AWS Lambda@Edge to run the application logic closer to the users.
- D
Increase the size of the EC2 instances hosting the application in the primary AWS Region to handle user requests more efficiently.
Show answer and explanation
Correct answer: B
Explanation
Amazon CloudFront is the most effective solution for reducing latency for global users without requiring significant changes to the application. By caching content at edge locations closer to users, CloudFront improves performance and ensures a better user experience. The other options either involve substantial application changes or fail to address the core issue of geographical latency.
- A. Incorrect.
Deploying the application to multiple AWS Regions with Route 53 latency-based routing can reduce latency, but it involves significant changes, including deploying and managing the application in multiple Regions. This doesn't align with the requirement to avoid significant application changes.
- B. Correct.
Using Amazon CloudFront caches the application content at edge locations and reduces latency for global users without requiring changes to the application architecture. This option aligns with the requirements and minimizes latency effectively.
- C. Incorrect.
Migrating the application to AWS Lambda@Edge could reduce latency but requires re-architecting the application to fit the serverless model. This does not meet the requirement to avoid significant application changes.
- D. Incorrect.
Increasing the size of EC2 instances in the primary Region may improve performance for handling requests but does not address the latency issue for users located far from the primary Region.