AWS Certified Solutions Architect – Associate (SAA-C03) — Question 597

A company wants to migrate two DNS servers to AWS. The servers host a total of approximately 200 zones and receive 1 million requests each day on average. The company wants to maximize availability while minimizing the operational overhead that is related to the management of the two servers.

What should a solutions architect recommend to meet these requirements?

Answer options

• A. Create 200 new hosted zones in the Amazon Route 53 console Import zone files.
• B. Launch a single large Amazon EC2 instance Import zone tiles. Configure Amazon CloudWatch alarms and notifications to alert the company about any downtime.
• C. Migrate the servers to AWS by using AWS Server Migration Service (AWS SMS). Configure Amazon CloudWatch alarms and notifications to alert the company about any downtime.
• D. Launch an Amazon EC2 instance in an Auto Scaling group across two Availability Zones. Import zone files. Set the desired capacity to 1 and the maximum capacity to 3 for the Auto Scaling group. Configure scaling alarms to scale based on CPU utilization.

Correct answer: A

Explanation

Amazon Route 53 is a fully managed, highly available, and scalable DNS service that completely eliminates the operational overhead of patching and maintaining underlying servers. Migrating the 200 zones directly to Route 53 hosted zones meets the requirements with minimal administrative effort. Relying on EC2 instances (as described in options B, C, and D) introduces unnecessary infrastructure management, scaling complexities, and potential single points of failure.