SAA-C03 Question 191
Single answerYour company runs an e-commerce application deployed in two AWS Regions: us-east-1 and us-west-2. The application uses an Amazon Route 53 DNS setup for routing traffic. You have been tasked with designing a failover strategy to ensure high availability and minimal downtime in case the application in one Region becomes unavailable. Which Route 53 configuration should you implement?
- A
Configure a Route 53 failover routing policy with primary and secondary records pointing to the respective endpoints in us-east-1 and us-west-2.
- B
Use a Route 53 geolocation routing policy to distribute traffic based on the geographic location of the users.
- C
Implement a Route 53 latency routing policy to route traffic to the Region with the lowest latency.
- D
Set up a Route 53 weighted routing policy to evenly distribute traffic across both Regions.
Show answer and explanation
Correct answer: A
Explanation
To ensure high availability and minimal downtime during a Regional outage, a Route 53 failover routing policy is the most appropriate choice. This configuration allows Route 53 to monitor the health of the primary endpoint and automatically route traffic to the secondary endpoint if the primary becomes unhealthy. Other routing policies like geolocation, latency, or weighted routing focus on distributing traffic but do not inherently provide failover capabilities.
- A. Correct.
This is the correct option. A Route 53 failover routing policy is specifically designed for high availability and disaster recovery scenarios. By designating a primary endpoint (us-east-1) and a secondary endpoint (us-west-2), Route 53 will automatically route traffic to the secondary endpoint if the primary becomes unavailable, ensuring minimal downtime.
- B. Incorrect.
This is incorrect. Geolocation routing directs traffic based on the geographic location of users, which does not guarantee failover in case of an endpoint failure.
- C. Incorrect.
This is incorrect. Latency routing optimizes performance by directing traffic to the endpoint with the lowest latency but does not provide failover functionality in the event of a Region's outage.
- D. Incorrect.
This is incorrect. Weighted routing distributes traffic based on preconfigured weights, which is not suitable for failover scenarios where traffic should only route to the secondary endpoint if the primary fails.