## RD Session Host Types Beginning with Parallels RAS v16.5, you can create and add to a RAS Farm the following types of RD Session Hosts: Individual servers. These can be physical boxes or virtual machines treated as physical servers. Virtual machines (VMs) created from a template, which is a part of RAS Virtual Desktop Infrastructure (VDI). The main advantage of using VMs is the ability to create as many of them as you require from a single template. RD Session Hosts based on a template are described in the Grouping and Cloning RD Session Hosts section. Considering that template is a part of RAS VDI, some aspects of creating, provisioning, and managing RD Session Hosts based on a template differ from the regular RD Session Hosts (individual servers). For example, template-based hosts are added to a Farm automatically from a group, not manually by the administrator. There are some other differences which are described in various sections of this chapter. When reading these sections, please pay attention to whether or not a particular functionality applies to RD Session Hosts based on a template.