The modern data center is undergoing rapid change. Virtualization is paving the way to the private cloud, enabling applications to be delivered at a fraction of the cost and time. Virtualization separates workloads from hardware for the pooling of resources to be dynamically allocated on-demand. This resource pooling enables the virtualized data center, and is a critical foundation for the Private Cloud. Private Clouds are implemented internally within the corporate firewall, and controlled by the IT department, bringing with them an element of trust that is less inherent in public clouds.