Since the mid 2000s one of the prevailing trends in the IT world has been to move networks, data, operating systems and servers into an environment where they are not tied to a specific piece of hardware.
In the early days the emphasis was on virtualisation. Organisations concentrated on increasing the number of servers on one machine using a hypervisor program with the activities kept in-house.
More recently there has been an emphasis on cloud computing, with more functions passing into the hands of a third party. The latter includes the option for a private cloud, dedicated to one enterprise.
Virtualisation and private cloud strategies are sometimes confused, not helped by the varying definitions.
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