SAA-C03 Question 11
Single answerA company is migrating its on-premises data to AWS and wants to ensure that its applications remain highly available during the transition. The company plans to use Amazon Route 53 for DNS management and needs a solution that can automatically route traffic to a healthy application version in case of failure. Which Route 53 routing policy should the company use?
- A
Simple routing policy
- B
Failover routing policy
- C
Geolocation routing policy
- D
Latency routing policy
Show answer and explanation
Correct answer: B
Explanation
The failover routing policy in Amazon Route 53 is the correct choice because it allows the company to specify a primary resource and a secondary resource. If Route 53 determines that the primary resource is unhealthy, it automatically routes traffic to the secondary resource, ensuring high availability. This matches the company's requirement to maintain application availability during the transition.
- A. Incorrect.
Simple routing policy is used when there is a single resource to route traffic to, and it does not provide failover capabilities.
- B. Correct.
Failover routing policy is designed specifically to route traffic to a healthy alternate resource in case the primary resource becomes unavailable, which is the requirement in this scenario.
- C. Incorrect.
Geolocation routing policy routes traffic based on the geographic location of the user, which does not address the need for automatic failover.
- D. Incorrect.
Latency routing policy routes traffic to the resource with the lowest network latency to the user, which does not provide failover capabilities.