What action must be performed after creating the second public subnet? 

The load balancer automatically creates security groups when launched. 

Where is the load test performed from during Phase 4?

In Phase 4, what is configured to automatically adjust the number of EC2 instances based on traffic?  

After deploying the Auto Scaling group, a new instance is created automatically.

How does Amazon RDS enhance database availability?

Which service is introduced in Phase 3 to manage the database separately?

Moving the database to Amazon RDS in Phase 3 improves security and availability.

Which AWS service is used to create a virtual network?

What is the primary reason for moving the database to Amazon RDS?