AWS Certified SysOps Administrator – Associate — Question 281

A SysOps administrator needs to deploy an application in multiple AWS Regions. The SysOps administrator must implement a solution that routes users to the Region with the lowest latency. In case of failure, the solution must automatically route requests to a Region with a healthy instance of the application. The company needs a solution with the shortest time to failover.

Which solution will meet these requirements?

Answer options

• A. Create Amazon Route 53 A records that have the same name for each endpoint. Use a latency routing policy. Associate a health check with each record.
• B. Create Amazon Route 53 A records that have the same name for each endpoint. Use a failover routing policy. Associate a health check with each record.
• C. Create an AWS Global Accelerator standard accelerator. Create an endpoint group for each Region. Add a listener to the accelerator. Associate the endpoint group with the listener.
• D. Create Amazon Route 53 A records that have the same name for each endpoint. Use a geolocation routing policy. Associate a health check with each record.

Correct answer: C

Explanation

AWS Global Accelerator is the optimal choice because it uses the AWS global network to route traffic to the closest healthy endpoint with minimal latency, achieving near-instantaneous failover since it does not rely on DNS caching or client-side TTLs. While Amazon Route 53 latency routing (Option A) can route traffic based on latency, its failover time is constrained by DNS caching, making it slower than Global Accelerator. Options B and D do not satisfy the lowest-latency routing requirement, as failover routing is active-passive and geolocation routing directs traffic based on user location rather than real-time network latency.