AWS Certified Solutions Architect Professional SAP-C02 Practice Question

The correct approach for a non-disruptive disaster recovery drill is to launch the recovery instances into an isolated network environment to prevent any conflicts, such as IP address clashes, with the production systems. This is a crucial best practice. Additionally, since the goal is to validate the process and not to run a full performance test, using cost-effective, general-purpose resources like T3 or T4g instances and gp3 EBS volumes is the most appropriate choice to meet the requirement of minimizing costs. The EC2 launch template in AWS DRS is the mechanism used to define these parameters for drill and recovery instances.

Launching instances with production-equivalent specifications is unnecessarily expensive for a validation drill and goes against the cost-minimization requirement. Launching instances into the production VPC, even with different security groups, introduces a significant risk of IP address conflicts and unintended interaction with live production services. Finally, while the Failback Client is a component of DRS, its purpose is to prepare for replicating data back to the source site after a recovery event; it is not relevant to the initial failover validation drill.