Editing IEEE 802.6

{{More citations needed|date=January 2022}}
'''IEEE 802.6''' is a standard governed by the [[American National Standards Institute|ANSI]] for [[Metropolitan Area Networks]] (MAN).<ref>{{Cite web|title=IEEE 802.6-1990 - Local and Metropolitan Area Networks: Distributed Queue Dual Bus (DQDB) Subnetwork of a Metropolitan Area Network (MAN)|url=https://standards.ieee.org/ieee/802.6/1129/|access-date=2021-12-09|website=[[IEEE]]}}</ref> It is an improvement of an older standard (also created by ANSI) which used the [[Fiber distributed data interface]] (FDDI) network structure. The FDDI-based standard failed due to its expensive implementation and lack of compatibility with current [[local area network|LAN]] standards. The IEEE 802.6 standard uses the [[Distributed-queue dual-bus network|Distributed Queue Dual Bus]] (DQDB) network form. This form supports 150&nbsp;Mbit/s transfer rates. It consists of two unconnected unidirectional buses. DQDB is rated for a maximum of 160&nbsp;km before significant signal degradation over fiberoptic cable with an optical wavelength of 1310&nbsp;nm.

This standard has also failed, mostly for the same reasons that the FDDI standard failed. MANs are traditionally designed using [[Synchronous optical networking|Synchronous Optical Network]] (SONET), [[Synchronous Digital Hierarchy]] (SDH) or [[Asynchronous Transfer Mode]] (ATM). Recent designs use native [[Ethernet]] or [[Multiprotocol Label Switching|MPLS]].

==References==
{{reflist}}

{{IEEE standards}}

[[Category:IEEE 802|IEEE 802.06]]
[[Category:Networking standards]]
[[Category:Metropolitan area networks]]


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