There are three main models of cloud computing, each representing a separate level of providing computing resources, and many other models are much less common, but nevertheless deserving of our attention and your more detailed study, if necessary, to work with these types of services.

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When in the distant 2001 the VMware ESXi hypervisor appeared on the market, a virtual revolution started that began the end of the era of personal computers with the programs installed on them. This event opened a new era in the development of computers and software – client-server technologies and cloud computing technologies.

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