What must be configured to allow vSphere HA to act upon VMs when a host is disconnected from the management network?

To enable vSphere High Availability (HA) to take appropriate actions when a host becomes disconnected from the management network, it is essential to configure the response for host isolation. When a host is isolated, it cannot communicate with other hosts in the cluster, which could prevent the HA from being aware of its status. Configuring the host isolation response allows vSphere HA to detect when a host has lost connectivity due to network issues, and based on the set policies, it can either power off the virtual machines (VMs) on that host or mark them as in need of failover.

By setting the response for host isolation, administrators can ensure that VMs running on an isolated host are handled correctly, either by restarting them on other available hosts within the cluster or ensuring that they remain operational if isolation is not definitive. This is crucial for maintaining high availability and service continuity for workloads in virtual environments.

Other choices, while related to the overall functionality and resilience of vSphere HA, do not directly address the situation where a host is disconnected from the management network. Admission control is focused on reserving resources for failover situations, VM monitoring assesses the health of VMs, and the host failure response is more about failures detected at the host level rather