What should a solutions architect recommend to meet these requirements?
Create 200 new hosted zones in the Amazon Route 53 console. Import zone files.
Launch a single large Amazon EC2 instance. Import zone files. Configure Amazon CloudWatch alarms and notifications to alert the company about any downtime.
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.
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.
Explanations:
Amazon Route 53 is a highly available and scalable DNS service that can easily handle a large number of DNS zones and requests. Creating hosted zones and importing zone files will simplify management, reduce operational overhead, and maximize availability with minimal manual intervention.
Launching a single EC2 instance would create a single point of failure, contradicting the goal of maximizing availability. Additionally, managing DNS on EC2 introduces operational overhead, and CloudWatch alarms would only alert after downtime occurs, not prevent it.
AWS Server Migration Service (AWS SMS) is primarily designed for migrating server workloads, not for DNS services. It would not address the goal of simplifying DNS management and ensuring high availability.
Launching EC2 instances in Auto Scaling does not address the DNS service needs. This setup would introduce unnecessary complexity and overhead, and it would not scale as effectively as Route 53 for DNS services. Also, EC2-based DNS management is not as scalable or efficient as using Route 53.
I appraise that the answer is:
Create 200 new hosted zones in the Amazon Route 53 console. Import zone files.