Classic AWS three-tier architecture featuring an Application Load Balancer distributing traffic across EC2 instances in an Auto Scaling Group. Internet traffic flows through the ALB in a Public Subnet to application servers in a Private Subnet, which connect to RDS PostgreSQL with read replica failover. Static assets are served from S3, offloading compute resources while the database tier maintains high availability through primary-replica replication. Ideal for architects validating VPC segmentation and scaling patterns. Fork this diagram on Diagrams.so to customize instance types, add caching layers, or export as .drawio for your architecture reviews.