Terms used in Virtualization
Hypervisor
A thin OS designed solely to provide virtualization. It drives physical hardware, executes VMs, and dynamically shares the underlying hardware with the associated virtual hardware.
Host system
The host system, also referred to as the parent, is where the physical hardware and software is installed.
These physical components are then copied by the hypervisor and delivered in a virtual state to the user.
If you are creating a virtual desktop environment, then the host system will have the desktop’s OS installed on it, along with the necessary software.
Guest system
The guest system, also referred to as the child, is where the VM is accessed.
To carry the example on from above, the OS that is installed on the host machine is replicated by the hypervisor and the copy is then delivered to the user.
The user can interact with the OS just as they would with the physical host machine, because the guest system is an exact copy of the host.
The only difference is, the guest machine is virtual instead of physical.
There are Two types of Hypervisors
Type 1 hypervisors run directly on the system hardware. They are often referred to as a "native" or "bare metal" or "embedded" hypervisors in vendor literature.
Type 2 hypervisors run on a host operating system. When the virtualization movement first began to take off, Type 2 hypervisors were most popular. Administrators could buy the software and install it on a server they already had.
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