VirtualisationIn computing, virtualisation (or more accurately a hypervisor) is a system that allows multiple operating systems to run on a single host computer at the same time.
A product like VMware or Microsoft’s Virtual Server supports multiple virtual machines running on the same physical computer. Each has its own operating system, its own storage and its own identity on the network. Virtual machines are not emulators or simulators. They are real machines that can do the same things that physical computers can do and more. Because of the flexibility of virtual machines, physical machines become less a way to provide services and more a way to house the virtual machines that provide those services.
Virtual machines are not sessions as in Windows Terminal Services or Citrix Presentation Server. Each virtual machine runs its own operating system (Windows, Linux, etc) while terminal server sessions on the same server share an operating system instance.
Benefits
Application Virtualisation
Also considered as application streaming, application virtualisation refers to the “de-coupling” of the execution of an application from the operating system of a desktop PC. With application virtualisation, each application brings down its own set of configurations on-demand, and executes in a way so that only it sees its own settings. This leaves the host operating system and existing settings unaltered. Both Microsoft and Citrix have application virtualisation products.
Benefits
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