Cloud Deployment Models

Four models of cloud deployment are recognized by NIST.

� Private cloud. The cloud infrastructure is operated solely for an organization. It may be managed by the organization or a third party and may exist on premise or off premise.

� Community cloud. The cloud infrastructure is shared by several organizations and supports a specific community that has shared concerns (e.g., mission, security requirements, 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).

Source of Information :  Implementing and Developing Cloud Computing Applications 2011