ANS-C01 Question 490
Select 3You are designing a multi-region failover solution for an application hosted on AWS. The application uses an Application Load Balancer (ALB) in each region and Route 53 for DNS routing. You need to ensure that traffic fails over to the secondary region if the primary region becomes unavailable. Which combination of Route 53 configurations would best meet this requirement?
- A
Use a Route 53 failover routing policy with health checks to monitor the primary region's ALB.
- B
Configure latency-based routing policies in Route 53 for both regions.
- C
Set up Route 53 health checks to monitor the endpoint status of both ALBs.
- D
Use a geolocation routing policy to direct traffic based on user location.
- E
Create Route 53 failover routing policies with a primary and secondary record.
Show answer and explanation
Correct answers: A, C, E
Explanation
To implement a multi-region failover solution, you need to use Route 53 failover routing policies with health checks. The failover routing policy ensures traffic is routed to the secondary region when the primary region is unavailable. Health checks are critical as they allow Route 53 to detect the failure of the primary endpoint and switch traffic accordingly.
- A. Correct.
Correct. A failover routing policy is specifically designed to route traffic to a secondary endpoint when the primary endpoint is unhealthy. This is essential for disaster recovery setups.
- B. Incorrect.
Incorrect. Latency-based routing directs traffic to the region with the lowest latency but does not provide failover capabilities in case of regional failure.
- C. Correct.
Correct. Health checks are necessary for Route 53 to determine the health status of the primary and secondary ALBs, which is critical for failover functionality.
- D. Incorrect.
Incorrect. Geolocation routing directs traffic based on the user’s location but does not handle failover scenarios.
- E. Correct.
Correct. Configuring failover routing policies with primary and secondary records ensures that Route 53 can route traffic to the secondary region during primary region failures.