Page 245 - How Cloud Computing Is Transforming Business and Why You Cant Afford to Be Left Behind

NIST DEFINITION O F C L O UD COMPUTING

Community cloud. The cloud infrastructure is shared by
several organizations and supports a specific community
that has shared concerns (e.g., mission, security require-
ments, policy, and compliance considerations). It may be
managed by the organizations or a third party and may
exist on premise or off premise.

Public cloud. The cloud infrastructure is made available to
the general public or a large industry group and is owned
by an organization selling cloud services.

Hybrid cloud. The cloud infrastructure is a composition
of two or more clouds (private, community, or public)
that remain unique entities but are bound together by

standardized or proprietary technology that enables data
and application portability (e.g., cloud bursting for load-
balancing between clouds).

Note: Cloud software takes full advantage of the cloud para-
digm by being service oriented with a focus on statelessness,
low coupling, modularity, and semantic interoperability.

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