> For the complete documentation index, see [llms.txt](https://docs.parallels.com/landing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.parallels.com/landing/ras-admin-guide/parallels-ras-21-administrators-guide/rd-session-hosts/rd-session-host-types.md).

# 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. For information on how to create these types of servers, see [**Adding an RD Session Host**](/landing/ras-admin-guide/parallels-ras-21-administrators-guide/getting-started-with-parallels-ras/set-up-a-basic-parallels-ras-farm/add-an-rd-session-host.md).
* 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. For information on how to create these types of servers, see **Add a template-based RD Session Host**.

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). When reading these sections, please pay attention to whether or not a particular functionality applies to RD Session Hosts based on a template.


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