Virtualization is the basis of the cloud computing and there are many platforms that are available like VMware is a technology that provides the provision to create private cloud and provide a bridge to connect external cloud with private cloud. There are three key features that have to be identified to make a private cloud that is:

• Cloud operating system.

• Manage the Service level policies

• Virtualization keeps the user level and the backend level concepts different from each other so that a seamless environment can be created between both.