The Host.Summary structure contains commonly used information about a host in vCenter Server.
Connection status of the host
Identifier of the host. When clients pass a value of this structure as a parameter, the field must be an identifier for the resource type: HostSystem. When operations return a value of this structure as a result, the field will be an identifier for the resource type: HostSystem.
Name of the host.
Power state of the host This field is optional and it is only relevant when the value of Host.Summary.connection-state is CONNECTED.