International Association of Scientific Innovation and Research (IASIR)
Users connect the cloud they seen cloud as a single application, device, or document. All things inside the cloud system like hardware in the cloud and the operating system that manages the hardware connections are invisible. Cloud computing is evolving very fast. It is considered as the next generation architecture for computing. Thus cloud computing is a combination of several computing resources that can be accessed via internet. Several IT professionals agree that cloud computing is the most revolutionary information delivery model since the introduction of the Internet.