A company runs its ecommerce site in a single AWS Region. The stack includes EC2 instances behind an ALB, a DynamoDB table, a Route 53 custom domain name pointing to the ALB, and an ACM certificate attached to the ALB. There is no CDN in use. The company wants to replicate the full application stack in a second Region for disaster recovery, future growth, and improved user latency, while minimizing administrative overhead. Which combination of actions should the solutions architect take? (Choose three.)
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Correct answer: Create an AWS CloudFormation template for the current infrastructure that uses parameters for key values (including Region). Use the template to provision the same infrastructure in the second Region., Update the Route 53 hosted zone record to use latency‑based routing and send traffic to the ALB in each Region., Enable DynamoDB Streams on the existing table and add the second Region to create a global table..
Why this is the answer
Creating a CloudFormation template with parameters for key values (including Region) allows for automated, consistent, and repeatable deployment of the infrastructure in the second Region, minimizing administrative overhead. Latency-based routing with Route 53 directs users to the closest healthy endpoint, improving user latency and supporting disaster recovery. Enabling DynamoDB Streams on the existing table and adding the second Region creates a global table, providing multi-Region replication for disaster recovery and improved data access latency without requiring a new table or manual data migration. Manually documenting and recreating infrastructure is error-prone and high-overhead. Weighted routing sends a fixed percentage of traffic, which isn't optimal for latency or disaster recovery compared to latency-based routing. Creating a new DynamoDB table and copying data is unnecessary and more complex when the existing table can be converted to a global table.
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