SAP-C02 Question 220
Select 2A company runs a globally distributed application with a multi-region architecture using Amazon Route 53 for DNS routing. The company wants to improve the availability of the application in the event of a complete regional failure. They also need to ensure that users are routed to the closest healthy region with minimal latency. Which combination of configurations would best achieve this requirement?
- A
Configure Route 53 with a latency-based routing policy and associate health checks with each region.
- B
Use Route 53 weighted routing to distribute traffic evenly across all regions.
- C
Set up Route 53 with a geolocation-based routing policy to route traffic based on user location.
- D
Implement Route 53 failover routing with health checks for primary and secondary regions.
- E
Combine latency-based routing with failover routing by defining failover records within latency records.
Show answer and explanation
Correct answers: A, E
Explanation
The combination of latency-based routing and failover routing with health checks ensures that traffic is directed to the closest healthy region (minimal latency) and provides a fallback option in case a region becomes completely unavailable. This approach meets the company’s requirements for both availability and performance in a multi-region architecture.
- A. Correct.
Correct: A latency-based routing policy ensures users are directed to the region with the lowest latency. Associating health checks ensures traffic is only sent to healthy endpoints.
- B. Incorrect.
Incorrect: Weighted routing does not prioritize user proximity or regional health, so it does not meet the requirements for minimal latency or handling regional failures.
- C. Incorrect.
Incorrect: Geolocation routing directs traffic based on the user’s location but does not account for latency or regional failures, making it unsuitable for this scenario.
- D. Incorrect.
Incorrect: Failover routing ensures high availability by routing traffic to a secondary region upon failure, but it does not optimize for minimal latency.
- E. Correct.
Correct: Combining latency-based routing with failover routing ensures that traffic is sent to the lowest-latency region by default, with an additional failover mechanism for handling regional outages.