SAP-C02 Question 470
Select 3You are designing a high-availability architecture for a mission-critical e-commerce application hosted on AWS. The application must provide low-latency access to users in multiple geographic regions and must withstand the failure of an entire AWS Region. Which combination of strategies should you implement to improve reliability while meeting these requirements?
- A
Deploy the application across multiple AWS Regions and use Amazon Route 53 with latency-based routing to direct users to the nearest Region.
- B
Use AWS Global Accelerator to improve application performance and automatically route traffic to healthy endpoints in case of failure.
- C
Configure the application to run in a single Region with Auto Scaling to handle variable traffic loads.
- D
Enable Amazon RDS Multi-AZ deployments for the application's database to provide automatic failover within an AWS Region.
- E
Implement Amazon S3 Cross-Region Replication to ensure durability and availability of critical data.
- F
Leverage AWS Outposts to deploy the application in on-premises environments for additional redundancy.
Show answer and explanation
Correct answers: A, B, E
Explanation
Improving reliability for a mission-critical application that must withstand Region failures and provide low-latency access requires multi-Region deployment strategies. Using Amazon Route 53 with latency-based routing, AWS Global Accelerator, and Amazon S3 Cross-Region Replication ensures application and data availability, resilience, and performance. Single Region solutions or on-premises deployments like AWS Outposts do not meet the requirements for multi-Region resilience.
- A. Correct.
Correct: Deploying the application across multiple AWS Regions ensures it can withstand the failure of an entire Region and provides low-latency access to users. Amazon Route 53 with latency-based routing directs users to the nearest healthy Region, improving reliability and performance.
- B. Correct.
Correct: AWS Global Accelerator enhances application reliability by routing traffic to the nearest healthy endpoint, automatically redirecting traffic in case of failure, and improving global performance.
- C. Incorrect.
Incorrect: Running the application in a single Region does not meet the requirement to withstand the failure of an entire Region. While Auto Scaling handles variable traffic, it does not improve reliability across Regions.
- D. Incorrect.
Incorrect: Amazon RDS Multi-AZ provides high availability within a single Region but does not protect against Region-wide failures.
- E. Correct.
Correct: Amazon S3 Cross-Region Replication ensures that critical data is available and durable across multiple Regions, improving reliability and meeting the requirement to withstand Region failures.
- F. Incorrect.
Incorrect: AWS Outposts extends AWS infrastructure to on-premises environments but does not address the need for multi-Region redundancy or low-latency access for users in different geographic regions.