Multi-AZ web application architecture spanning two AWS availability zones with Route 53 DNS, dual Application Load Balancers, and Auto Scaling EC2 instances across isolated subnets. Traffic flows from users through Route 53 to Internet Gateway, then to ALBs in each AZ, distributing requests to t3.medium EC2 instances in private application subnets. Application tier connects to RDS MySQL with primary-standby replication across AZs and S3 for file storage, eliminating single points of failure. This architecture demonstrates AWS best practices for fault tolerance, auto-scaling, and separation of concerns using VPC subnets and security groups. Fork and customize this diagram on Diagrams.so to match your CIDR blocks, instance types, or add additional services like CloudFront or ElastiCache.