Cloud computing is a general term for anything that involves delivering hosting services over the Internet. A cloud service has three distinct characteristics that differentiate it from traditional hosting. It is sold on demand, typically by the minute or by the hour, it is elastic – a user can have as much or as little of a service as they want at any given time; and the service is fully managed by the provider.
Here is a graphical look at the cloud computing landscape. From private and enterprise cloud providers (such as IBM, HP/3Par, and VMware), to public cloud services (like Google and Microsoft Azure), to the Hybrid cloud (Verizon and the NRE Alliance of newScale, rPath and Eucalyptus as examples).
via Today’s Cloud Computing Landscape [Infographic] « Wikibon Blog.
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