ANS-C01 Question 279
Single answerYour organization is deploying an application across multiple AWS Regions to ensure high availability and low latency for global users. The application requires fast and consistent DNS resolution with low-latency routing to the nearest Region. Which AWS service and configuration should you use to achieve this?
- A
Use Amazon Route 53 with Geolocation Routing Policy.
- B
Use Amazon Route 53 with Latency Routing Policy.
- C
Use AWS Global Accelerator with Application Load Balancers in each Region.
- D
Use Elastic Load Balancing with Cross-Region Load Balancing enabled.
Show answer and explanation
Correct answer: B
Explanation
To meet the requirement of fast and consistent DNS resolution with low-latency routing to the nearest region, Amazon Route 53 with Latency Routing Policy is the best solution. This policy ensures that user requests are routed to the AWS Region with the lowest latency, providing the desired performance and availability for global users.
- A. Incorrect.
Geolocation Routing Policy determines routing based on the user's geographic location, but it does not guarantee the lowest latency. This option is not suitable for ensuring low-latency DNS resolution.
- B. Correct.
Latency Routing Policy in Amazon Route 53 routes users to the region with the lowest latency, ensuring fast and consistent DNS resolution. This is the correct configuration for the given requirements.
- C. Incorrect.
AWS Global Accelerator improves application performance by routing traffic to the optimal endpoint, but it doesn't handle DNS resolution directly. This doesn't address the specific requirement of DNS routing.
- D. Incorrect.
Elastic Load Balancing with Cross-Region Load Balancing allows distributing traffic across regions, but it doesn't provide DNS resolution based on latency. This is not the correct solution for this scenario.