Cloud computing or a cloud model is a model of network computing where an application or a program functions with the connected server/s instead of the local computing device which may include a PC, Smartphone or a tablet. As with the model of a traditional clientserver, the Cloud model features the user connectivity with the server in order to perform the task.
Cloud connectivity features one or more physical servers that can be configured and parsed into a number of independent servers. Each server functions independently and thus it appears as a single physical device to the user. The server 'farm' or resources can easily sbe caled up or down and even moved around various locations without affecting the end user. With the introduction of cloud applications the end users and operators now have the benefit of various facilities such ondemand selfservice, resource pooling, wide access across multiple devices, instant elasticity and much more.
Today the term ‘cloud’ has turned a shorthand way of referring to a cloud computing infrastructure. Furthermore the cloud system actually refers to the software and infrastructure platforms which are remotely through the web. The cloud model features selling of the energy- consuming servers by the cloud service providers from a remote location to the endusers. This offers great benefits to the users, as they just simply need to log on to the network without installing any software or anything else of the kind.
The major cloud models are referred to as platform as a service, infrastructure as a service and software as a service. The cloud application services can be offered in a private, hybrid or public network. Few popular cloud vendors include Amazon, Google, IBM, Rackspace, Oracle Cloud, Zoho , Microsoft and Salesforce.
Cloud computing models depend generally on a sharing of resources in order to achieve economies of scale and coherence equal to the utility over a network. The bottom line of cloud computing holds even broader concept relating shared services and infrastructure. Cloud model usually aims at maximization of the effectiveness of the resources that are being shared.
Cloud applications not only feature a sharing of the network by the end users but the resources used in the applications are also reallocated per demand dynamically.
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