The following notes will assist you to prepare for this objective:
- Be very clear that this is vCenter availability management NOT host
- Learn the topology of a vCenter HA deployment
- Nodes
- Roles of nodes
- What can and can’t they do? Particularly witness
- Set up vCenter HA in your lab, so much more interesting study than just reading
- Easy to enable/disable
- Make sure you read the vCenter HA section of the vSphere Availability Guide
Reference: vSphere 6.7 Availability Guide pdf – Chapter 4 – vCenter High Availability
IT Wiz Technology Blog 