There are three basic service models to consider in a university based cloud computing, such as Public, Private and Hybrid clouds.

对于大学中的云计算，可以考虑三种基本的服务模型，比如公共（Public）、私有（Private）和混合（Hybrid）云。

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Three possibilities proposed by Cox: a "peer-to-peer" social network, a cluster of "virtual individual servers" running on a cloud service such as Amazon Elastic Computer Cloud, and "hybrid decentralization, " a mix of the two approaches.

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In hybrid form, a private cloud can include data stored on premise or off, with a private Platform-as-a-Service middleware layer managing application data and enforcing data security.

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