Question #1646
A company plans to migrate three DNS servers hosting 150 zones, which handle approximately 800,000 requests daily. The company aims to maximize availability and minimize operational management of the DNS infrastructure. What should a solutions architect recommend to meet these requirements?
Create 150 new hosted zones in Amazon Route 53 and import the zone files.
Deploy three Amazon EC2 instances across three Availability Zones, import the zone files, and configure Amazon CloudWatch alarms for downtime alerts.
Migrate the servers using AWS Server Migration Service (AWS SMS) and configure Amazon CloudWatch alarms for downtime alerts.
Launch Amazon EC2 instances in an Auto Scaling group across three Availability Zones, import the zone files, set the desired capacity to 3, and configure scaling policies based on network utilization.
Explanation
The correct answer is A because Amazon Route 53 is a fully managed DNS service designed for high availability and scalability. By creating hosted zones and importing zone files, the company offloads DNS management to AWS, eliminating the need to maintain servers, patches, or scaling logic. Route 53 automatically handles global traffic routing, redundancy, and high request volumes (800,000 daily requests).
Why other options are incorrect:
- B and D: Deploying EC2 instances requires manual management of DNS software, scaling, and availability, increasing operational effort.
- C: Migrating servers via AWS SMS still leaves the company responsible for DNS server management on EC2.
Key Points:
- Route 53 is serverless, highly available, and requires no infrastructure management.
- Hosted zones simplify DNS zone management, aligning with the goal of minimizing operational tasks.
Answer
The correct answer is: A