Computing as a utility remains the dream of data center managers, where more resources are just available when you need them, like electricity when you turn on the lights.

Dynamic hosting and cloud computing are the core technologies that are going to make that dream of utility computing a reality.

In dynamic hosting and cloud computing environments, new network, server, VM and applications can be provisioned dynamically, by customer and at various time periods. That certainly sounds like utility computing, but as any IT manager who's done it can tell you, it is far from throwing a light switch.

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