ANS-C01 Question 339
Select 3Your organization has deployed a highly available application across multiple AWS Regions. The application uses an Amazon Route 53 latency-based routing policy to direct traffic to the closest Region based on user latency. Recently, a Region experienced an outage, and users in that Region reported increased latency until the issue was resolved. What additional configuration should you implement to minimize latency during future Regional outages?
- A
Configure a Route 53 health check for each Region and associate it with the latency-based routing records.
- B
Enable multi-value answer routing in Route 53 instead of latency-based routing.
- C
Implement Amazon CloudFront with an origin failover configuration to handle Regional outages.
- D
Use Route 53 geolocation routing to redirect traffic to a specific Region during outages.
- E
Configure Route 53 failover routing in addition to latency-based routing to redirect traffic to healthy Regions.
Show answer and explanation
Correct answers: A, C, E
Explanation
To minimize latency during Regional outages, it's essential to configure Route 53 health checks and failover routing to redirect traffic away from unhealthy Regions. Additionally, implementing Amazon CloudFront with origin failover can provide an extra layer of resilience and latency optimization, as CloudFront caches content globally and manages failover at the edge.
- A. Correct.
Correct: Configuring health checks ensures Route 53 can automatically detect Regional outages and stop routing traffic to the affected Region, minimizing latency for users.
- B. Incorrect.
Incorrect: Multi-value answer routing provides health check-based DNS responses but does not optimize user latency like latency-based routing.
- C. Correct.
Correct: Amazon CloudFront can cache content globally and fail over between origins in different Regions, reducing latency during outages.
- D. Incorrect.
Incorrect: Geolocation routing is designed for routing based on geographic location, not latency, and would not help mitigate latency issues during outages.
- E. Correct.
Correct: Combining failover routing with latency-based routing ensures that traffic can be redirected to healthy Regions in case of failures, complementing the latency-based policy.