The VM (Virtual Machine) used in the title of this technology is a bit misleading because the application does not need to be hosted on virtual machines as physical machines will be sufficient, as long as they are being execution of a single-user Windows operating system such as Windows XP and have a compatible agent, called the Virtual desktop agent (VDA).
Intermediated connections
Virtual desktop operating system uses the Virtual Desktop Agent (VDA), which is a piece of software to communicate through a broker to an agent installed on the client device using a remote display protocol , called the Citrix ICA protocol.
This protocol allows the movement of the mouse and keystrokes on the client device to be captured and relayed to the virtual desktop in near real time. Since these mouse movements and keystrokes are applied by the virtual desktop, the resulting changes to the virtual appearance of desktops are transmitted to the client device, refresh the image of the image seen by the client and giving the impression that the product change as the client device, when in fact it took place on the virtual desktop.
Incompatible applications VM Hosted Apps offers the ability to deliver applications that otherwise would not have been possible in a XenApp environment because it would not have been able to be installed on XenApp servers due to application compatibility problems, or be a resource intensive, affecting server stability aa or may need some kind of hardware such as USB dongles for biometric devices are working properly.
Published applications
By enabling virtual desktop publishing applications using XenApp management tools, users can access applications through a Web browser (via Citrix Online Plug-in) or using Citrix Receiver. It is the same type of access, access published applications installed on XenApp servers.
Access to this farm is given to users who use the web interface that can be shared with a traditional farm XenApp, however, as stated, VM Hosted Apps agriculture can not be shared with other XenApp.
The web interface allows desktop applications and VM Hosted Apps farm (VMHA) and XenApp batteries appear to users as a single source (provided users with the appropriate permissions).
Authentication and access control
Using technology similar to XenDesktop, Desktop Delivery Controller (DDC) is required for user authentication, management of virtual desktop environments, and broker connections between users and their virtual desktops.
Implications license
Licensing requirements requires the use of XenApp licenses, each user connection using a XenApp license application sessions, regardless of whether the application is in a XenApp farm applications or hosted VM farm (VMHA).
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