A hypervisor software also referred to as VMM or virtual machine monitor enables hardware virtualization.
It is a standard technique where many guest operating systems are allowed to run concurrently on a host computer.
The hypervisor is installed on the server hardware and provides a virtual operating platform to the guest systems.
The hypervisor is a thin layer of software running directly on the system hardware and has security advantages being very small in size. With such a small footprint the possibility of malicious exploits comes down dramatically.
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