AWS Certified SysOps Administrator – AssociateNetworking and Content DeliveryMedium
A SysOps administrator needs to configure a highly available and scalable DNS solution for a new web application. The application will be accessed by users globally. The administrator wants to use a custom domain name (example.com) and ensure that if the primary application endpoint becomes unhealthy, traffic is automatically routed to a secondary, healthy endpoint in another region. Which Amazon Route 53 routing policy should be used to achieve this failover capability?
- AFailover routing policy
- BLatency routing policy
- CWeighted routing policy
- DSimple routing policy
Show answer & explanationAnswer & explanation
Correct answer: A. Failover routing policy
The Failover routing policy in Route 53 allows you to route traffic to a resource when the primary resource is unhealthy. It requires associating health checks with records to automatically switch to a secondary endpoint if the primary fails.
Why the other options are wrong
- B. Latency routing routes traffic to the region that provides the lowest latency, but does not inherently provide health-check-based failover.
- C. Weighted routing distributes traffic based on weights, but does not automatically failover based on health checks.
- D. Simple routing is for single resources and does not support health checks or failover.
Route 53 Failover Routing Policy
A Route 53 routing policy that allows you to route traffic to a primary resource when it's healthy, and to a secondary resource when the primary is unhealthy.
- Requires Route 53 health checks
- Supports active-passive failover configurations
- Ideal for disaster recovery and high availability
Memory trick: Simple is one, Weighted is a slice, Latency is fast, Failover is a backup.