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There are four types of cloud computing deployment models,which include private, public, hybrid and community cloud computing.
Private cloud: Private cloud also referred to as internal cloud,[Zhang et al. (2010)] is exclusive to the internal use of an organization. It is either managed by the organization itself, or managed by a third party. (It provides the highest form of control over reliability, performance and security).

Public cloud: Involves making services such as application,hardware and servers available to the general public [Dillon et al.2010]. Some of the applications are made available for free, to the public whilst others are accessed on a pay as you go service. It is easy, and inexpensive, to deploy because it requires no capital
investment on infrastructure and cloud service providers are solely responsible for making policy, profiting, cost and value as regarding it.Continue Reading.http://relationshiptalks.com.ng/cloud-computing-development-model-for-business/