Multi-AZ enterprise architecture spanning AWS cloud and on-premises infrastructure with Route 53 DNS, CloudFront CDN, and WAF protecting a tiered application across presentation, API middleware, application, and data layers. Traffic flows through API Gateway and AppSync for REST and GraphQL APIs, with ECS Fargate, Lambda, and EC2 instances handling compute across isolated subnets in two availability zones. RDS Aurora with read replicas, DynamoDB global tables, ElastiCache Redis, and S3 data lakes provide resilient data persistence, while SQS, SNS, Step Functions, and EventBridge orchestrate asynchronous workflows. AWS Direct Connect and VPN Gateway integrate on-premises systems running parallel infrastructure, with IAM, Secrets Manager, KMS, CloudWatch, and CloudTrail enforcing security and observability across the entire hybrid deployment. Fork this diagram to customize VPC CIDR blocks, instance types, or API classifications for your organization's specific workload patterns.