The National Institute of Standards and Technology's definition of cloud computing identifies "five essential characteristics": Cloud computing relies on sharing of resources to achieve coherence and typically uses a pay-as-you-go model, which can help in reducing capital expenses but may also lead to unexpected operating expenses for users. Large clouds often have functions distributed over multiple locations, each of which is a data center. For the horse, see Cloud Computing (horse).Ĭloud computing metaphor: the group of networked elements providing services does not need to be addressed or managed individually by users instead, the entire provider-managed suite of hardware and software can be thought of as an amorphous cloud.Ĭloud computing is the on-demand availability of computer system resources, especially data storage ( cloud storage) and computing power, without direct active management by the user.
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