ANS-C01 Question 489
Select 3Your organization is running a multi-region application hosted in AWS. The application uses Amazon Route 53 to route traffic based on latency to users in different parts of the world. Recently, a number of regions experienced high latency and some users reported they were unable to access the application. Upon investigation, you found that certain health checks associated with Route 53 were failing. Which of the following steps would you take to ensure high availability and proper traffic routing in such scenarios?
- A
Configure Route 53 health checks to monitor the health of the endpoints and failover to healthy ones in case of failures.
- B
Use Route 53 Geolocation routing to route traffic to the closest region instead of relying on latency-based routing.
- C
Enable Route 53 Multi-Value Answer routing to return multiple healthy endpoints to users.
- D
Increase the Route 53 health check interval to reduce the frequency of false positives.
- E
Implement Route 53 failover routing policies to direct traffic to a backup region when the primary region is unhealthy.
Show answer and explanation
Correct answers: A, C, E
Explanation
To maintain high availability and proper traffic routing, it is crucial to configure Route 53 health checks, use Multi-Value Answer routing to provide multiple healthy endpoints, and implement failover routing policies to redirect traffic in case of regional failures. These steps ensure that traffic is routed to functional endpoints, minimizing downtime and latency issues.
- A. Correct.
Configuring Route 53 health checks ensures that unhealthy endpoints are automatically detected and traffic is routed away from them. This is a critical step for maintaining high availability.
- B. Incorrect.
Geolocation routing is not suitable in this scenario as it does not address latency issues or health check failures. It routes traffic based on geographic location rather than endpoint health.
- C. Correct.
Enabling Multi-Value Answer routing helps improve availability by providing multiple healthy endpoints to clients, allowing them to choose an available one.
- D. Incorrect.
Increasing the health check interval might reduce false positives, but it can delay detection of actual issues, which is not ideal for high-availability scenarios.
- E. Correct.
Failover routing policies in Route 53 enable automatic redirection of traffic to a backup region when the primary one becomes unhealthy, ensuring business continuity.