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Platform virtualization is performed on a given hardware platform by host software (a control program), which creates a simulated computer environment, a virtual machine, for its guest software. The guest software is not limited to user applications; many hosts allow the execution of complete operating systems. The guest software executes as if it were running directly on the physical hardware, with several notable caveats. Access to physical system resources (such as the network access, display, keyboard, and disk storage) is generally managed at a more restrictive level than the host processor and system-memory. Guests are often restricted from accessing specific peripheral devices, or may be limited to a subset of the device's native capabilities, depending on the hardware access policy implemented by the virtualization host.

Few benefits of virtualization:

- Lower number of physical servers - you can reduce hardware maintenance costs because of a lower number of physical servers.

- By implementing a server consolidation strategy, you can increase the space utilization efficiency in data center.

- By having each application within its own "virtual server" you can prevent one application from impacting another application when upgrades or changes are made.

- You can develop a standard virtual server build that can be easily duplicated which will speed up server deployment.

- You can deploy multiple operating system technologies on a single hardware platform (i.e. Windows Server 2003, Linux, Windows 2000, etc).

By taking advantage of server virtualization you can easily improve the efficiency of your Windows Data Center, as well as lowe