A hypervisor (also called virtual machine monitor (VMM)) allows multiple operating systems to run concurrently on a host computer — a feature called hardware virtualization.

A hypervisor

[is a] piece of software that provides abstraction of all physical resources (such as central processing units, memory, network, and storage) and thus enables multiple computing stacks (consisting of an operating system, middleware and application programs) called virtual machines to be run on a single physical host.[1]
creates a virtual platform on the host computer, on top of which multiple guest operating systems are executed and monitored. This way, multiple operating systems, which are either multiple instances of the same operating system or different operating systems, can share the hardware resources offered by the host.[2]


The hypervisor presents the guest operating systems with a virtual platform and monitors the execution of the guest operating systems. In that way, multiple operating systems, including multiple instances of the same operating system, can share hardware resources.


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