AWS Certified Advanced Networking – Specialty (ANS-C01)Network DesignMedium
A global company operates a highly available web application with users distributed across multiple continents. The application uses Amazon Route 53 for DNS resolution. To minimize latency for users, the company wants to route traffic to the AWS Region that provides the best user experience based on actual network conditions. Which Route 53 routing policy should be implemented?
- AFailover routing policy
- BLatency routing policy
- CGeolocation routing policy
- DSimple routing policy
Show answer & explanationAnswer & explanation
Correct answer: B. Latency routing policy
The Route 53 Latency routing policy routes user requests to the AWS Region that provides the lowest latency for that specific user. Route 53 measures latency from various points on the internet to AWS data centers and uses this information to determine the best region.
Why the other options are wrong
- A. Failover routing policy routes traffic to a primary resource when it's healthy, and to a secondary resource when the primary is unhealthy; it's for disaster recovery, not latency optimization.
- C. Geolocation routing policy routes traffic based on the geographic location of the user, which is different from actual real-time network latency.
- D. Simple routing policy returns one or all values in a random order; it does not consider latency.
Route 53 Latency Routing Policy
A Route 53 routing policy that routes user requests to the AWS Region that provides the lowest network latency for the user.
- Optimizes user experience by minimizing latency
- Based on measured latency from users to AWS Regions
- Requires health checks for endpoint availability
- DNS-based routing
Memory trick: Latency routing guides users to the fastest AWS road.