SAA-C03 Question 174
Select 2A company is deploying a new web application that must serve global users with low latency. The application requires DNS-based traffic routing to direct users to the closest AWS Region with the best performance. Additionally, the company wants to ensure application availability even if an entire AWS Region becomes unavailable. Which combination of AWS services and configurations is MOST appropriate for this use case?
- A
Use Amazon Route 53 with a latency-based routing policy to direct traffic to multiple AWS Regions.
- B
Deploy the application in a single AWS Region and use Amazon CloudFront for global caching.
- C
Deploy the application across multiple AWS Regions and use Amazon Route 53 with a failover routing policy for disaster recovery.
- D
Use AWS Global Accelerator to route user traffic to the closest application endpoint in an AWS Region.
- E
Deploy the application in multiple Availability Zones within a single AWS Region to achieve high availability globally.
Show answer and explanation
Correct answers: A, C
Explanation
To meet the requirements of low latency for global users and disaster recovery across AWS Regions, the application should be deployed in multiple AWS Regions. Amazon Route 53 with latency-based routing ensures users are directed to the closest Region with the best performance, while failover routing provides high availability in case an entire Region becomes unavailable. These configurations work together to fulfill both the performance and availability needs of the application.
- A. Correct.
Correct: Route 53 with latency-based routing ensures that users are directed to the AWS Region with the lowest latency, improving performance for global users.
- B. Incorrect.
Incorrect: Deploying the application in a single Region with CloudFront only improves performance for cached content but does not provide global high availability or disaster recovery across Regions.
- C. Correct.
Correct: Deploying the application across multiple AWS Regions with Route 53 failover routing ensures application availability even if an entire Region becomes unavailable.
- D. Incorrect.
Incorrect: AWS Global Accelerator can improve performance for global applications but does not provide DNS-based routing or multi-Region disaster recovery capabilities.
- E. Incorrect.
Incorrect: Deploying in multiple Availability Zones within a single Region improves high availability within that Region but does not address global latency or disaster recovery requirements.