A solutions architect needs to define a reference architecture for a solution for three-tier applications with web. application, and NoSQL data layers. The reference architecture must meet the followi

A weighted routing policy is for traffic distribution, not automatic failover, and would require manual intervention or complex health checks to achieve a 1-minute RTO during a failure.

An Amazon Route 53 failover routing policy automatically redirects traffic to a healthy secondary region upon detecting primary region failures, directly addressing the 1-minute failover requirement.

Amazon DynamoDB global tables provide active-active, multi-Region replication for NoSQL data, ensuring data availability in both regions for rapid recovery and low-latency access.

A backup and restore strategy every 60 minutes results in a Recovery Point Objective (RPO) of up to 60 minutes and would exceed the 1-minute Recovery Time Objective (RTO) for failover due to the time required for restoration.

Implementing a hot standby model with Auto Scaling groups in both regions means infrastructure for the web and application layers is already running in the secondary region, facilitating a near-instantaneous failover and meeting the 1-minute RTO.

Using Auto Scaling groups across multiple Availability Zones in a single Region provides high availability within that region but does not address the multi-Region disaster recovery requirement for failing over to another Region.