Multi-AZ three-tier EKS architecture spanning three AWS availability zones with Route 53 DNS, CloudFront CDN, and WAF protection at the edge. Traffic flows through Internet Gateway to Application Load Balancers in public subnets, routing requests to EKS nodes running containerized backends across private subnets in each AZ. RDS Multi-AZ deployment with primary, standby, and read replica instances provides database resilience, while ElastiCache clusters enable distributed caching across all three zones. This architecture demonstrates AWS best practices for fault tolerance, auto-scaling, and observability using CloudWatch and CloudTrail. Fork and customize this diagram on Diagrams.so to match your specific subnet sizing, instance types, or multi-region requirements.