What are the different "security options" to upgrade the hosts with UM ? (choose 3)
Ref: Page 109 on http://pubs.vmware.com/vsphere-50/topic/com.vmware.ICbase/PDF/vsphere-update-manager-50-install-administration-guide.pdf
Important and Moderate are for Virtual Machines
Severity Severity of the update. For hosts, the severity status might be Critical, General, Security, and so on. For virtual machines, the severity might be Critical, Important, Moderate, and so on.