SAA-C03 Question 171
Select 3Your company has deployed a multi-tier web application currently hosted in the us-east-1 AWS Region. For disaster recovery (DR) purposes, you need to ensure that the application can fail over to another AWS Region with minimal downtime. Which combination of actions will allow you to achieve this using AWS global infrastructure?
- A
Deploy the application's resources, such as EC2 instances and RDS databases, in another AWS Region.
- B
Configure Amazon Route 53 with a failover routing policy to route traffic to the secondary Region in case of a failure in the primary Region.
- C
Use AWS Direct Connect to establish a dedicated connection between the primary and secondary Regions.
- D
Enable Cross-Region Read Replicas for the RDS database to keep data synchronized between the primary and secondary Regions.
- E
Set up AWS Global Accelerator to automatically redirect traffic to the secondary Region in case of failure.
Show answer and explanation
Correct answers: A, B, D
Explanation
To implement a disaster recovery strategy using AWS global infrastructure, you need to deploy resources in a secondary AWS Region, use Amazon Route 53 to manage failover routing, and ensure data synchronization between Regions (e.g., with Cross-Region Read Replicas for RDS). These actions together enable minimal downtime and data consistency during a Region-wide failure.
- A. Correct.
This is a correct option as deploying resources in another AWS Region ensures that your application can operate in the secondary Region during a failure in the primary Region.
- B. Correct.
This is a correct option as Route 53's failover routing policy can help manage traffic appropriately by redirecting users to the secondary Region when the primary Region becomes unavailable.
- C. Incorrect.
This is incorrect because AWS Direct Connect is primarily used for establishing private connectivity from on-premises to AWS Regions, not for failover between AWS Regions.
- D. Correct.
This is a correct option as enabling Cross-Region Read Replicas for the RDS database ensures that the database is kept synchronized between the primary and secondary Regions, which is essential for DR.
- E. Incorrect.
This is incorrect because AWS Global Accelerator is not specifically designed for disaster recovery or failover between Regions; it improves global application performance by routing traffic to the optimal endpoint.