Learn in the textbookFundamentals and Types of Virtualization
DefinitionThe hypervisor type (ハイパーバイザー型) places control software dedicated to virtualization (the hypervisor) directly on the hardware and runs virtual machines on top of it.
ExplanationThe hypervisor is in charge of allotting CPU and memory to each virtual machine. Few layers sit between the guest OS and the hardware, so this type is widely used on servers that run many virtual machines together.
AnalogyIt is like building an apartment block with self-contained units straight onto an empty lot. With no owner's house in between, residents of each unit can come and go easily.
Memory hookThe core of an OS was once also called the supervisor. Standing one level above it (hyper) and overseeing several OSs together is the hypervisor.