SOA-C02 Question 96
Single answerA company hosts a web application across multiple AWS Regions to provide low-latency access to users worldwide. The application uses Amazon Route 53 to manage DNS records. The company wants to ensure that users are routed to the closest Region based on latency, but if a Region becomes unavailable, traffic should automatically be rerouted to the next closest Region. Which Route 53 routing policy or combination of policies should be used to achieve this?
- A
Latency-based routing with health checks
- B
Failover routing only
- C
Weighted routing with health checks
- D
Geolocation routing with health checks
Show answer and explanation
Correct answer: A
Explanation
To meet the company's requirements, latency-based routing should be used. This policy directs users to the endpoint with the lowest latency, ensuring optimal performance for users worldwide. By enabling health checks, Route 53 can automatically detect when a Region is unavailable and reroute traffic to the next closest Region, ensuring high availability.
- A. Correct.
Correct. Latency-based routing ensures users are routed to the Region with the lowest network latency. When combined with health checks, Route 53 can detect when a Region is unavailable and reroute traffic to the next closest Region.
- B. Incorrect.
Incorrect. Failover routing alone does not account for latency; it only switches traffic between primary and secondary endpoints when the primary fails.
- C. Incorrect.
Incorrect. Weighted routing distributes traffic based on pre-configured weights, not based on latency or health. It does not meet the requirement to route users to the closest Region.
- D. Incorrect.
Incorrect. Geolocation routing directs traffic based on the geographic location of users, not latency. This does not meet the requirement to prioritize low-latency access.