Cloud computing , networking , cloud computing holds promise in multiple segement from clouds products to web content management used in cloud based application.Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources like 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, three service models, and four deployment models. Cloud computing is type of computing relies on sharing computing resources rather than having local servers or personal devices to have applications. Cloud computing is comparable to grid computing, a type of computing where unused processing cycles of all computers in a network are harnesses to solve problems too intensive for any stand-alone machine. One of the key characteristics of cloud computing is the flexibility that it offers and one of the ways that flexibility is offered is through scalability. This refers to the ability of a system to adapt and scale to changes in workload. Cloud technology allows for the automatic provision and deprovision of resource as and when it is necessary, thus ensuring that the level of resource available is as closely matched to current demand as possible. Cloud computing came about with the convergence of technologies. relativley inexpensive server and storage make data center possible.Increased availability of high-speed Internet connections means these data centers can be located where it is most economical .Over the past decade, cloud computing has disrupted nearly every facet of IT. Sales, marketing, finance and support – all of these applications are being reengineered to take advantage of cloud’s instant access, no download and pay go attributes.