What option should be used in vSphere HA to act on VMs when a host is disconnected from the management network?

The correct choice is to use the option that defines the “Response for Host Isolation.” When a host in a vSphere environment becomes disconnected from the management network, it may still be operational but unable to communicate with the vCenter Server. This situation is often referred to as host isolation.

The “Response for Host Isolation” option allows administrators to specify the actions that should be taken for virtual machines (VMs) running on a host that has become isolated. Common responses include powering off the VMs, leaving them powered on, or restarting them on other available hosts in the cluster. This setting is crucial for maintaining service availability and ensuring proper handling of VMs when network connectivity issues occur.

By configuring this response, administrators can proactively manage VM behavior during host isolation scenarios, thus ensuring that workloads remain available or are safely restarted elsewhere in the cluster, depending on the chosen response. This capability enhances the overall resilience of the virtual environment, making it a vital feature in vSphere HA configurations.