IEEE802.X protocol suite

         802.X协议是由（美）Presented by the Institute of Electrical and Electronics Engineers,Just finished standardizing a conformIEEE802 协议集的局域网 接入控制协议,The full name is port-based 访问控制协议.能够在利用IEEE 802Based on the advantages of the local area network, it provides a means of authenticating and authorizing users connected to the local area network,Reached to accept legitimate user access,保护 网络安全的目的. 802.1x认证,又称EAPOE认证,主要用于 宽带IP 城域网.

        IEEE于1980年2In January, the LAN Standards Committee was established（简称IEEE 802委员会）,Specializing in local area network standardization,并制定了IEEE 802标准.802The described local area network reference model corresponds onlyOSI参考模型的 数据链路层与 物理层,它将数据链路层划分为 逻辑链路控制LLC（Logical Link Control）子层与 介质访问控制MAC（Media Access Control）子层.

         IEEE802 A protocol is a physical protocol,Because of the following sub-protocols,Putting these protocols together is called802 协议集.

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802.1--High-level and its interactive work.Provides a framework for high-level standards,Including end-to-end protocols、网络互连、 网络管理、 路由选择、 桥接和性能测量.

802.2--Connect Link ControlLLC,提供OSIHigher sublayer functions of the data link layer,提供LAN 、MAC子层与高层协议间的一致接口.

802.3-- 以太网规范,定义CSMA/CDstandard bus 介质访问控制（MAC）子层和 物理层规范.

802.4--令牌总线网.定义 令牌总线（Token Bus） 介质访问控制（MAC）子层和 物理层规范.

802.5-- 令牌环线网,Define the token pass ring（Token Ring） 介质访问控制（MAC）子层和 物理层规范.

802.6-- 城域网MAN,Define a metropolitan area network（MAN）的 介质访问控制（MAC）子层和 物理层规范(DQDBDistributed queue dual bus).

802.7--宽带技术咨询组,Provides advice and consultation on broadband network technologies to other subcommittees.

802.8--光纤技术咨询组,Advise and consult other subcommittees on the use of fibre optic network technologies.

802.9--综合话音/数据局域网（IVD LAN ）.Define synthetic speech/Data terminal access to integrated voice/数据局域网（包括IVD LAN、MAN、WAN ）的 媒体访问控制（MAC）子层和 物理层规范.

802.10--可互操作 局域网安全标准（SILS ）.Define LAN interconnection security mechanisms.

802.11-- 无线局域网.Defines free space media 媒体访问控制（MAC）子层和 物理层规范.

802.12--On-demand priority（100VG-ANYLAN ）.Defines the use of the on-demand priority access method100Mpbs 的以太网标准.

802.14--Defines the cable tone 调制解调器（cable modem）标准.

802.15--Defines the close personal 无线网络标准.

802.16--Broadband is defined 无线局域网标准.

目前,IEEE标准802.1-802.6 已成为ISO的国际标准ISO8802-1~8802-6.

802.17 (弹性分组环 (Resilient Packet Ring))

802.18：wireless control Radio Regulatory TAG 　

802.19：共存 Coexistence TA

802.20：移动宽带无线接入 Mobile Broadband Wireless Access (MBWA)

802.21：Media independent switching Media Independent Handoff