Three-tier AWS architecture separating web, application, and database layers within a VPC for security and scalability. Internet users connect via HTTPS to an Application Load Balancer distributing traffic across three EC2 instances (t3.medium) in an Auto Scaling Group within a private application subnet. The application tier performs read/write operations to an RDS PostgreSQL Primary (db.t3.large) with a Read Replica for read-only queries, while static assets are served from an S3 Bucket. Fork this diagram on Diagrams.so to customize instance types, add CloudFront, or export as .drawio for your documentation.