This article was originally published on AI Study Room . For the full version with working code examples and related articles, visit the original post. AWS VPC Design: Subnets, NAT, Peering, Transit Gateway, and Security Groups AWS VPC Design: Subnets, NAT, Peering, Transit Gateway, and Security Groups AWS VPC Design: Subnets, NAT, Peering, Transit Gateway, and Security Groups AWS VPC Design: Subnets, NAT, Peering, Transit Gateway, and Security Groups AWS VPC Design: Subnets, NAT, Peering, Transit Gateway, and Security Groups Introduction Amazon Virtual Private Cloud (VPC) is the foundational networking layer for AWS infrastructure. Every AWS resource — EC2 instances, RDS databases, Lambda functions, ECS tasks — exists within a VPC. Proper VPC design directly impacts security, performance, scalability, and cost. A poorly designed VPC can cause connectivity issues, security vulnerabilities, and expensive data transfer bills.…