XenDesktop is essentially a suite. Through its bundled components, XenDesktop can deliver several different types of virtual desktops. Citrix calls this ability to deliver desktops by a variety of methods FlexCast; disk images must be modified for each delivery method.
Hosted shared desktops (XenApp) – multiple users can access a single, shared Remote Desktop Services (RDS) desktop.
Virtual Desktop Infrastructure (VDI) desktops – each user has their own virtual machine that runs on a server and is accessed and controlled using a remote display protocol.
Streaming disk images – desktop images are created on a Citrix Provisioning Server and streamed to the client device as needed. Processing takes place on the client device.
On-Demand Apps – delivers Windows applications from the data center. Does not provide end users with a virtual desktop but does allow software applications to be delivered online or offline.
XenDesktop’s capability to deliver on-demand apps is sometimes confused with another Citrix product called XenApp. The difference is with XenDesktop each client receives a full virtual machine; each client receives its own instance of Windows and desktop instances are not shared between users. XenApp, on the other hand, provides access to hosted resources for multiple users from a Windows server and users share the server’s CPU, RAM and other physical resources.
New versions of XenDesktop 7.x utilize the FMA (FlexCast Management Architecture), is truly FIPS compliant and have added even more HDX technology for performance over high latency networks.
Click below for a video overview of XenDesktop