标准摘要
[中文适用范围]： 以太网局域网操作适用于从 1 Mb/s 到 400 Gb/s 的选定操作速度，使用共同的中继接入控制 (MAC) 规范和管理信息库 (MIB)。载波监听多路访问/冲突检测 (CSMA/CD) MAC 协议指定共享介质（半双工）操作以及全双工操作。特定速度的介质无关接口 (MII) 允许在同轴电缆、双绞线、光纤电缆或电气背板上运行选定的物理层设备 (PHY)。多段共享访问网络系统考虑因素描述了重复器的使用，这些重复器定义为操作速度高达 1000 Mb/s。所有速度均支持局域网 (LAN) 操作。其他指定功能包括：用于接入网络的 various PHY 类型，适用于城域网应用的 PHY，以及通过选定的双绞线 PHY 类型提供电源。 [外文原描述]： This document defines Ethernet local area, access and metropolitan area networks. Ethernet is specified at selected speeds of operation; and uses a common media access control (MAC) specification and management information base (MIB). The Carrier Sense Multiple Access with Collision Detection (CSMA/CD) MAC protocol specifies shared medium (half duplex) operation, as well as full duplex operation. Speed specific Media Independent Interfaces (MIIs) provide an architectural and optional implementation interface to selected Physical Layer entities (PHY). The Physical Layer encodes frames for transmission and decodes received frames with the modulation specified for the speed of operation, transmission medium and supported link length. Other specified capabilities include: control and management protocols, and the provision of power over selected twisted pair PHY types.
英文名称Telecommunications and exchange between information technology systems - Requirements for local and metropolitan area networks - Part 3: Standard for Ethernet