1. Virtual machines and administration

1.1 Principle and use

While moving data from one place to another on the network is easy to understand, the mobility of servers through virtualization deserves some clarification. As cloud computing relies entirely on server virtualization techniques, which completely determine the security considerations that apply to it, it is appropriate to give a sufficiently comprehensive presentation here.

To run application software (financial management, web server, etc.), you need disk space to store data and results, and a computer to calculate results from the data. In fact, most of the time, you also need an operating system, which is software designed to act as an intermediary between the user (or his application software) and the computer, because if each piece...