AWS Certified Cloud Practitioner

Explanation

This architecture represents the Reliability pillar of the AWS Well-Architected Framework because:

• Automatic scaling of compute resources ensures the system can handle increased demand and maintain availability
• Disaster recovery plan with automatic failover provides business continuity and system resilience
• Reliability pillar focuses on:
  • Recovering from infrastructure or service disruptions
  • Dynamically acquiring computing resources to meet demand
  • Mitigating disruptions such as misconfigurations or transient network issues

While other pillars are important:

• Operational excellence focuses on running and monitoring systems
• Security focuses on protecting information and systems
• Performance efficiency focuses on using computing resources efficiently

The combination of auto-scaling and disaster recovery directly addresses the core principles of the Reliability pillar.