# VDI Hosts A VDI host is a computer on which a hypervisor is running one or more virtual machines (also known as guest virtual machines or guest VMs). Each VM runs an operating system called the guest operating system (or guest OS). Please note that Parallels Remote Application Server supports Windows as a guest OS only. By adding a VDI host to a site, you can manage VMs running on it, create new VMs from a template, and publish desktops and applications from their respective guest operating systems. This chapter explains how to add, configure, and use VDI hosts and guest VMs to serve published resources to your users.
In This Section Adding a VDI Host Installing an Appliance and Configuring a VDI Host Using Parallels RAS Templates VDI Host Pool Management Persistent Guest VMs Publishing from a Guest VM VDI Agent Technology