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|author= Kuang-Ching "KC" Wang
|date=Oct 3, 2011
}}</ref>{{fv|reason=No mention of Quanta|date=June 2024}}
Beyond academia, the first deployments were by [[Nicira]] in 2010 to control OVS from Onix, codeveloped with NTT and Google. A notable deployment was [[Google]]'s B4 in 2012.<ref>{{cite web
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==Concept==
SDN architectures decouple network control ([[control plane]]) and forwarding ([[data plane]]) functions, enabling the network control to become directly programmable and the underlying infrastructure to be abstracted from applications and network services.<ref>{{cite web|url=http://www.opennetworking.org/sdn-resources/sdn-definition|title=Software-Defined Networking (SDN) Definition|website=Opennetworking.org|access-date=26 October 2014}}</ref>
The OpenFlow protocol can be used in SDN technologies. The SDN architecture is:
* Directly programmable: Network control is directly programmable because it is decoupled from forwarding functions.
* Agile: Abstracting control from forwarding lets administrators dynamically adjust network-wide [[Traffic flow (computer networking)|traffic flow]] to meet changing needs.
* Centrally managed: Network intelligence is (logically) centralized in software-based SDN controllers that maintain a global view of the network, which appears to applications and policy engines as a single, logical switch.
* Programmatically configured: SDN lets network managers configure, manage, secure, and optimize network resources very quickly via dynamic, automated SDN programs, which they can write themselves because the programs do not depend on proprietary software.<ref>{{Cite journal|last1=Montazerolghaem|first1=Ahmadreza|last2=Yaghmaee|first2=Mohammad Hossein|last3=Leon-Garcia|first3=Alberto|date=September 2020|title=Green Cloud Multimedia Networking: NFV/SDN Based Energy-Efficient Resource Allocation|url=https://ieeexplore.ieee.org/document/9044834|journal=IEEE Transactions on Green Communications and Networking|volume=4|issue=3|pages=873–889|doi=10.1109/TGCN.2020.2982821|s2cid=216188024|issn=2473-2400}}</ref>
* Open standards-based and vendor-neutral: When implemented through open standards, SDN simplifies network design and operation because instructions are provided by SDN controllers instead of multiple, vendor-specific devices and protocols.<!--[[User:Kvng/RTH]]-->
==New network architecture==
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