Cloud computing basically three types of Deployment Models
Private Cloud
In a private cloud companies operate their own data centers and use their services on your own (business) purposes within their own private networks. The use by the public is not in question here. Data security, 'Corporate Governance' and reliability are therefore in their own sphere of influence. For this reason, private clouds are counted only indirectly to cloud computing. Here only the ideas and concepts to be adapted.
Public Cloud
In a public cloud computing capacity, storage space, etc. are provided for a fee or for free to the public. The tasks performed by a company in the private cloud, are then transferred to the public cloud from a third party. These include, for example, the purchase and maintenance of the server. The duties and services of different customers become hosted and processed together on the same infrastructure. A single client has no knowledge of services whose will be stored and processed on the same infrastructure.
Hybrid Cloud
A hybrid cloud is a combination of a private and a public cloud. In this case, have via their own private cloud, but use additional services from the public cloud by external providers. The appeal is, above all, that the external provider can quickly and cost-effectively increase or decrease the required infrastructure as needed. The services are integrated into the private cloud, that the end user does not notice that he actually works elsewhere.
Virtual Private Cloud
In the recent past, a new type of cloud computing has emerged, the Virtual Private Cloud. It is as with the hybrid cloud is a combination of a public cloud and a private cloud. The difference, however, that a public cloud provider for the customer provides a dedicated (virtual) area in the data center of the provider. Here the customer can then but create its own virtual data center to the private cloud aspects (data protection, data security and compliance) under the terms of a public cloud (scalability, availability, flexibility, and pay per use). A compound of the Virtual Private Cloud with the own data center is also possible.
