Just as the definition of cloud computing is nebulous and varied, the same can be said of the definition of cloud infrastructure.

According to Wikipedia, “Cloud computing providers offer their services according to three fundamental models: infrastructure as a service, platform as a service and software as a service, where IaaS is the most basic and each higher model abstracts from the details of the lower models.” Cloud infrastructure should be viewed more than just a service; it is much more complex and involves many distinct, yet interdependent layers or topic areas. 

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