Cloud Computing

A Public Cloud is implemented using a shared data center infrastructure of hardware and software that is shared by multiple organizations. The data center is off-premises.

The Cloud Computing Stack in a Public Cloud is also shared with other organizations. The data, however, for each organization is kept separate. If the data center is shared but not the Cloud Computing Stack, that is a Virtual Private Cloud. If neither the data center nor the Cloud Computing Stack are shared, that is a Private Cloud.

A Public Cloud may participate in a Hybrid Cloud.

For arguments in favor of using a Public Cloud, see Using a Public Cloud instead of an In-House Private Cloud.