4. The three service models
Three service models can be offered on the Cloud (figure 1 ):
Software as a Service (SaaS) ;
Platform as a Service (PaaS) ;
Infrastructure as a Service (IaaS).
These three service models must be deployed on infrastructures that possess the five essential characteristics listed above to be considered Cloud Computing.
4.1 Software as a Service (SaaS)
This service model is characterized by the use of a shared application running on a Cloud infrastructure. The user accesses the application over the network via various types...
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The three service models
The four deployment models
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Websites
NIST National Standard Institute http://www.nist.gov/itl/cloud/index.cfm
Cloud computing: on the air or down to earth http://www.slideshare.net/RevistaSG/cloud-computing-on-the-air-or-down-to-earth-beneficios-para-la-empresa
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