Three-tier AWS architecture separating web, application, and database layers within a VPC for security and scalability. Internet traffic flows through an Application Load Balancer to EC2 instances in an Auto Scaling Group across private subnets. The database tier uses RDS PostgreSQL with a read replica for high availability, while S3 handles static assets. This pattern demonstrates AWS best practices for fault-tolerant, cost-effective web applications. Fork this diagram on Diagrams.so to customize subnet configurations or add CloudFront for global CDN.