Types of Server Virtualization
Server virtualization is not a one-size-fits-all approach. Over the years there have been several approaches to implementing server virtualization technology. In this chapter we will look at three main approaches powering server virtualization, but before we step into it, it is important to understand the relevant portion of x86 architecture revolving around its levels of privileges.
x86 architecture defines four hierarchical levels of privilege. These levels are also known as rings. Rings are layered in the way where the most privileged access is given through Ring 0, where the operating system running on the server is allowed to communicate with physical resources, such as CPU and memory. Rings that have lower ...
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