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+ | == Definitions == |
| − | 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]]. |
+ | 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''' |
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| + | {{Quote|[is 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>[[FFIEC Cybersecurity Assessment Tool]], App. C: Glossary, at 5.</ref>}} |
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| + | {{Quote|creates a [[virtual]] [[platform]] on the [[host computer]], on top of which multiple guest [[operating system]]s are [[execute]]d and [[monitor]]ed. This way, multiple [[operating system]]s, which are either multiple instances of the same [[operating system]] or different [[operating system]]s, can share the [[hardware]] resources offered by the [[host]].<ref>[[Counting the Cost: Cyber Exposure Decoded]], at 21.</ref>}} |
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== Overview == |
== Overview == |
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| + | "Hypervisors are one of the fundamental building blocks of the [[cloud]]: they maintain the separation and [[privacy]] of neighbouring [[virtual machine]]s, thereby enabling the entire [[ecosystem]] to function. Isolation between [[virtual machine]]s is a key element of [[security]], and [[privacy]] between each [[implementation]] and therefore any disruptions or breakdown to this function could lead to wide-scale interruption for all [[virtual machine]]s residing on a [[server]]."<ref>''Id.''</ref> |
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| − | The hypervisor presents the guest [[operating system]]s with a [[virtual platform]] and [[monitor]]s the execution of the guest [[operating system]]s. In that way, multiple [[operating system]]s, including multiple instances of the same [[operating system]], can share [[hardware resource]]s. |
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| + | == References == |
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| + | <references /> |
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Latest revision as of 03:36, 8 October 2019
Definitions
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] | ” |
Overview
"Hypervisors are one of the fundamental building blocks of the cloud: they maintain the separation and privacy of neighbouring virtual machines, thereby enabling the entire ecosystem to function. Isolation between virtual machines is a key element of security, and privacy between each implementation and therefore any disruptions or breakdown to this function could lead to wide-scale interruption for all virtual machines residing on a server."[3]
References
- ↑ FFIEC Cybersecurity Assessment Tool, App. C: Glossary, at 5.
- ↑ Counting the Cost: Cyber Exposure Decoded, at 21.
- ↑ Id.
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