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The emerging trend of cloud computing that delivers the computing as a service rather than a product whereby shared resources software and information that are provided to computers and other devices as the utility over the network. Cloud computing model is composed of three service models Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS) and four deployment models Public, Private, Hybrid/mixed. In this paper Cloud computing system that consist of inter-connected computers and virtualized computers that are dynamically provisioned and presented as one or more unified computing resources based on service-level agreements established through negotiation between the service provider and consumers.
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