Cloud computing is said to be most widely used due to today's developing technology of called as "computing". It offers the online resources to its users and its storage is delivered by using their platform and infrastructure. Generally, the cloud computing refers to the delivery of services over the internet. It is said to offer pay for usage and it bring downs the cost of IT usage also.It also increases the enormous amount of influence on how the IT services will be consumed in future.Cloud

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... mputing has the concepts of data centres ,which is spreader or scattered around the world with single or multiple data centres and virtualization with on demand services over the internet.