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{{Short description|Creation of functions which may be chained to deliver communication services}}
'''Network functions virtualization''' ('''NFV''')<ref>{{Cite web | url=http://www.etsi.org/technologies-clusters/technologies/nfv |title = ETSI - Standards for NFV - Network Functions Virtualisation | NFV Solutions}}</ref> is a [[network architecture]] concept that leverages IT [[virtualization]] technologies to virtualize entire classes of [[network node]] functions into building blocks that may connect, or chain together, to create and deliver communication services.
NFV relies upon traditional server-[[virtualization]] techniques such as those used in enterprise IT. A '''virtualized network function''', or '''VNF''', is implemented within one or more [[virtual machines]] or [[OS-level virtualization|containers]] running different software and processes, on top of commercial off the shelf (COTS) high-volume servers, switches and storage devices, or even [[cloud computing]] infrastructure, instead of having custom hardware appliances for each network function thereby avoiding vendor lock-in.
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