Considering Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS), I think by far the most interesting one is PaaS. The idea behind PaaS is that the service provider manages the development environment providing the core language and libraries while maintaining a separation between customer apps and data. You can get that now with a virtual hosting environment, but PaaS adds things like scalable storage, processing capacity, networking and other neat stuff. PaaS lets your developers focus on what's important, which is application functionality. Even so, you won't be tossing out virtualization in your data center anytime soon.
To learn more and to read the entire article at its source, please refer to the following page, The Cloud May Not Need Server Virtualization, But Enterprises Do- NetworkComputing.com
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