During a physical network reconfiguration, an ESXi host briefly lost connection to the management
network. High Availability (HA) began powering off the virtual machines residing on the affected
host to be restarted on an unaffected host in the cluster.
Which setting should the administrator configure to prevent this type of HA failover during planned
maintenance?
A.
Host isolation response
B.
Host monitoring
C.
VM monitoring
D.
Admission control
After you create a cluster, Host Monitoring enables the vSphere HA master host to respond to host or virtual machine failures and management network isolation. Admission control allows you to specify whether virtual machines can be started if they violate availability constraints. The cluster reserves resources to allow failover for all running virtual machines on the specified number of hosts.
The Host Monitoring and Admission Control page appears only if you enabled vSphere HA.
I believe the correct answer is Host Isolation response:
Host Isolation Response
Host isolation response determines what happens when a host in a vSphere HA cluster loses its management network connections but continues to run. You can use the isolation response to have vSphere HA power off virtual machines that are running on an isolated host and restart them on a non-isolated host. Host isolation responses require that Host Monitoring Status is enabled. If Host Monitoring Status is disabled, host isolation responses are also suspended. A host determines that it is isolated when it is unable to communicate with the agents running on the other hosts and it is unable to ping its isolation addresses. When this occurs, the host executes its isolation response. The responses are: Leave powered on (the default), Power off then failover, and Shut down then failover. You can customize this property for individual virtual machines.