SOA-C02 Question 95
Single answerYour company has a critical web application hosted in multiple AWS regions to serve global users. You are tasked with configuring Amazon Route 53 to ensure that users are directed to the region that provides the lowest latency for their requests. If one of the regions becomes unavailable, traffic should automatically fail over to the next best performing region. Which Route 53 routing policy or combination of policies should you use to meet this requirement?
- A
Latency-based routing policy with failover routing configured
- B
Weighted routing policy with health checks enabled
- C
Simple routing policy with multiple record sets
- D
Geolocation routing policy with failover routing configured
Show answer and explanation
Correct answer: A
Explanation
To meet the requirements of directing users to the region with the lowest latency and ensuring failover in case of a regional failure, you need to use a combination of latency-based routing and failover routing in Route 53. Latency-based routing ensures users are served from the region with the best performance, while failover routing ensures high availability by redirecting traffic to another region if the primary region becomes unavailable.
- A. Correct.
Correct. Latency-based routing ensures that users are directed to the region with the lowest latency, and failover routing ensures that if a region becomes unavailable, traffic is redirected to the next available region.
- B. Incorrect.
Incorrect. Weighted routing distributes traffic based on pre-defined weights, not latency. Even with health checks enabled, it does not prioritize the region with the lowest latency.
- C. Incorrect.
Incorrect. Simple routing does not support latency-based decisions or failover. It only allows basic routing to a single endpoint or a group of endpoints.
- D. Incorrect.
Incorrect. Geolocation routing directs traffic based on the user's geographic location, not latency. Failover routing can work with geolocation routing but will not meet the latency requirement.