An architect is designing for a VMware Cloud Foundation (VCF) Instance.

A homogeneous cluster (A) is the appropriate VCF design because equivalent host configurations across both availability zones provide predictable compute, memory, and storage capacity during normal operation and site failure. Broadcom specifically recommends uniform host configurations because they provide predictable performance and minimize the impact of rebuild and resynchronization operations.

C reflects the stretched-cluster requirement to maintain substantial compute failover capacity. A two-availability-zone design must be capable of running the affected workloads on the surviving site. VCF stretched designs therefore reserve approximately 50% CPU and memory capacity for availability-zone failure. Of the supplied choices, maintaining peak compute utilization below 45% is the correct design choice. With an absolute corporate ceiling of 85%, a conservative implementation would actually target approximately 42.5% or lower where workload demand can effectively double after site loss; however, C is the intended and only valid failover-oriented option provided.

F is correct because vSAN requires operational slack capacity for rebalancing, rebuilds, policy changes, and failures. Broadcom recommends approximately 25–30% free capacity , making 70% maximum utilization an appropriate design target.

B introduces unpredictable capacity symmetry. D leaves insufficient vSAN operational reserve, while E cannot provide adequate compute headroom following loss of an availability zone.

Study Guide References/Topics: VCF Stretched Cluster Design; Management Domain Capacity Planning; Availability Zone Failure; Homogeneous Host Configuration; vSAN Reserved/Slack Capacity; vSphere HA Capacity Planning.