Orient yourself to the weatherboards you'll be working with: the board you're replacing, the board immediately above it and the one immediately below it. Call the board above the one you're replacing board A.. Board B is the board that you're replacing.
Desktop virtualization is the concept of separating the logical desktop from the physical machine. One form of desktop virtualization, virtual desktop infrastructure (VDI), can be thought of as a more advanced form of hardware virtualization.
XenDesktop VDI pairs the user personalization benefits of virtual desktop infrastructure appliances with the administrative efficiencies of single image management to deliver a desktop virtualization solution that meets the needs of both users and IT admins.