Cloud Computing

“Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. This cloud model promotes availability and is composed of five essential characteristics (On-demand self-service, Broad network access, Resource pooling, Rapid elasticity, and Measured Service),, three service models (Software as a Service, Platform as a Service, and Infrastructure as a Service), and four deployment models (Private cloud, community cloud, public cloud, and hybrid cloud)”. (Mell & Grance, 2011) 
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