A Virtual Private Cloud is implemented using a shared data center infrastructure of hardware and software. The data center is most likely off-premises. It is shared with multiple organizations. If the data center is not shared, that is a Private Cloud.
A Virtual Private Cloud may participate in a Hybrid Cloud.
The following figure uses Customer Relationship Management (CRM) Software as a Service (SaaS) to illustrate a Virtual Private Cloud.
More on the general topic: Types of Clouds in Cloud Computing
Author: Douglas K Barry
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The Savvy Manager's Guide
Douglas K Barry is also the author of a book that explains Web Services, service-oriented architecture, and Cloud Computing in an easy-to-understand, non-technical manner.
Web Services, Service-Oriented Architectures, and Cloud Computing: The Savvy Manager's Guide (Second Edition)
by Douglas K Barry with David Dick
This is a guide for the savvy manager who wants to capitalize on the wave of change that is occurring with Web Services, service-oriented architecture, and—more recently—Cloud Computing. The changes wrought by these technologies will require both a basic grasp of the technologies and an effective way to deal with how these changes will affect the people who build and use the systems in our organizations. This book covers both issues. Managers at all levels of all organizations must be aware of both the changes that we are now seeing and ways to deal with issues created by those changes.