Network function virtualization

Network functions virtualization (NFV) is a <a href="/facts/Network_architecture/b9IWEJIU">network architecture</a> concept that leverages IT <a href="/facts/Virtualization/bEqH0Wtf">virtualization</a> technologies to virtualize entire classes of <a href="/facts/Network_node/LBp2vNcJ">network node</a> functions into building blocks that may connect, or chain together, to create and deliver communication services.
NFV relies upon traditional server-<a href="/facts/Virtualization/bEqH0Wtf">virtualization</a> techniques such as those used in enterprise IT. A virtualized network function, or VNF, is implemented within one or more <a href="/facts/Virtual_machines/BLevU3sx">virtual machines</a> or <a href="/facts/OS-level_virtualization/gkLoCrgN">containers</a> running different software and processes, on top of commercial off the shelf (COTS) high-volume servers, switches and storage devices, or even <a href="/facts/Cloud_computing/guhg0FGV">cloud computing</a> infrastructure, instead of having custom hardware appliances for each network function thereby avoiding vendor lock-in.
For example, a virtual <a href="/facts/Session_border_controller/Nepbz3uk">session border controller</a> could be deployed to protect a network without the typical cost and complexity of obtaining and installing physical network protection units. Other examples of NFV include virtualized <a href="/facts/Network_Load_Balancing/4pggSSrT">load balancers</a>, <a href="/facts/Firewall_(computing)/Et2RkJaU">firewalls</a>, <a href="/facts/Intrusion_detection_system/mAw24Fyo">intrusion detection devices</a> and <a href="/facts/WAN_optimization/VTsbmdlx">WAN accelerators</a> to name a few.
The decoupling of the network function software from the customized hardware platform realizes a flexible network architecture that enables agile network management, fast new service roll outs with significant reduction in CAPEX and OPEX.

Network function virtualization open-in-new

Network function virtualization