Multi-AZ three-tier e-commerce architecture leveraging Route 53 DNS, CloudFront CDN with AWS Shield and WAF protection, and dual availability zones across us-east-1. Traffic flows from global users through Route 53 to CloudFront for static assets via S3, then through Internet Gateway to Application Load Balancers distributing requests to ECS Fargate tasks with Auto Scaling. Application tier connects to ElastiCache Redis for session caching and RDS MySQL with Multi-AZ failover and read replicas for data persistence, all secured with Security Groups, IAM Roles, Secrets Manager, and KMS encryption. This architecture demonstrates AWS best practices for fault tolerance, auto-scaling, and defense-in-depth security across compute, cache, and database layers. Fork and customize this diagram on Diagrams.so to match your VPC CIDR blocks, region preferences, and scaling policies. The design isolates workloads in private subnets with NAT Gateways for outbound traffic, enabling secure communication while maintaining compliance and observability through CloudWatch and CloudTrail.