Cloud computing enables companies to get agile, leverage infrastructure on demand, and run it like a utility. The cloud environment provides flexibility, scalability and continuous availability with expert services. Rapid prototyping and to solve business process through analysis can be easily done by having access to a cloud environment. While the benefits are many but, the public cloud does not fulfill the needs of individual organizations which need better privacy and data security. In public cloud, many clients can access virtualized services from the same pool of servers and resources, but in private cloud clients mainly access services from a distinct pool of physical computers. Nowadays many organizations opt for a middle way i.e. hybrid cloud solution to avoid disadvantages of private cloud. Please go through the link for more details: http://www.daywatcher.com/what-is-a-private-cloud/