AWS Secure VPC Private EC2 Architecture isolates application servers in private subnets across availability zones, with controlled outbound internet access via NAT Gateway. Traffic from admin and presentation tiers routes through Internet Gateway to NAT Gateway, then to private EC2 instances protected by security groups. This architecture enforces least-privilege network access, prevents direct inbound internet exposure to compute resources, and maintains compliance with security best practices. Fork and customize this diagram on Diagrams.so to match your multi-tier application topology, subnet sizing, and security group rules.