Multi-AZ university database system spanning two AWS availability zones with CloudFront CDN, AWS WAF, and Route 53 for global content delivery and DDoS protection. Traffic flows through Internet Gateway to Application Load Balancers distributing requests across EC2 t3.medium app servers, ECS Fargate course services, and Lambda registration handlers in redundant private subnets. RDS PostgreSQL primary and standby instances in separate AZs replicate data, while DynamoDB session stores provide fast, distributed session management with cross-AZ replication. CloudWatch monitors application health, IAM enforces least-privilege access, Secrets Manager secures credentials, and S3 stores student documents and automated backups for disaster recovery. This architecture demonstrates high availability, fault tolerance, and security best practices for mission-critical educational platforms.