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== Definition ==
 
== Definition ==
   
A '''hypervisor''' (also called '''virtual machine monitor''' ('''VMM''')) allows multiple [[operating system]]s to [[run]] [[concurrent]]ly on a [[host computer]] — a feature called [[hardware virtualization]].
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A '''hypervisor''' (also called '''virtual machine monitor''' ('''VMM''')) allows multiple [[operating system]]s to [[run]] [[concurrent]]ly on a [[host computer]] — a feature called [[hardware virtualization]].
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'''Hypervisor''' is
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{{Quote|a] piece of [[software]] that provides abstraction of all physical resources (such as [[central processing unit]]s, [[memory]], [[network]], and [[storage]]) and thus enables multiple [[computing stack]]s (consisting of an [[operating system]], [[middleware]] and [[application program]]s) called [[virtual machine]]s to be [[run]] on a single physical [[host]].<ref>Cybersecurity Assessment Tool , App. C: Glossary, at 5.</ref>}}
   
 
== Overview ==
 
== Overview ==

Revision as of 00:24, 8 September 2017

Definition

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

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]

Overview

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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  1. Cybersecurity Assessment Tool , App. C: Glossary, at 5.
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