The administrator must back up a vCenter HA deployment.
Which component must be backed up?
A.
Passive node
B.
Witness node
C.
External database
D.
Active node
Explanation:
When taking backups, avoid backing up the Passive and Witness nodes. Just take a backup of the Active
node. When restoring an Active node, you must remove all the cluster configuration, restore and re-create the
HA cluster.
https://www.altaro.com/vmware/how-to-deploy-a-vcenter-ha-cluster-part-1/