The text discusses the prerequisites for deploying a MongoDB Cloud Manager environment with AWS, specifically highlighting the differences between EC2 Classic and VPC (Virtual Private Cloud) network environments. It explains that VPC provides more control over network configuration, including routes and subnets, allowing users to create isolated resources within the AWS ecosystem. The text also touches on customizing the VPC, using tools like CloudFormation to create "stacks" of resources based on JSON templates, and leveraging these templates to automate the deployment of MongoDB instances in private subnets. Additionally, it notes that while Cloud Manager does not provide direct instance provisioning for private subnets, users can use alternative methods to configure security groups and extend their AWS configuration for added security and control.