VCF 9.0 supports both Single-Zone and Multi-Zone Supervisor cluster deployments. In a single-zone deployment, all Supervisor control plane VMs and worker nodes reside within a single logical and physical fault domain (a single vSphere cluster). Consequently, the cluster will not have zone-level fault isolation. If the underlying hardware, power, or top-of-rack switch for that specific zone fails, the entire Supervisor instance and all hosted workloads (VMs and Pods) will go offline. Multi-zone clusters, by contrast, distribute nodes across three distinct zones to ensure that the control plane and workloads can survive the complete loss of one zone. While a single-zone cluster is suitable for non-critical development or testing, it represents a significant risk for production environments that require the high-availability and fault-tolerance features inherent to the VCF 9.0 multi-zone architecture.