文档介绍：1第二章IOS的基本配置2主要内容?了解Cisco的网络设备?LAN应用?WAN应用?IOS配置基础?管理网络环境??LAN应用?以太网的数据链路层和物理层的实现?UTP?直连线?交叉线?翻转线4以太网的数据链路层和物理层的实现物理层数据链路层(MAC layer)?物理层有多种实现标准? 规范10MB 规范100MB (Fast) 标准100baseT410BaseFDIX 标准5以太网介质比较10Base5100BaseTX10BaseT100BaseFX介质最大传输距离拓扑连接器50-ohm coax (thick)500 米Bus100 米StarStarPoint-to-PointEIA/TIA Cat3 UTP2 pairEIA/TIA Cat5 UTP2 micron multi-mode fiberAUIISO 8877 (RJ-45)Duplex media-interface connector (MIC) STISO 8877 (RJ-45)400 米100 米6连接器AUI 连接头,又称为 DB15ISO 8877 (RJ-45) 连接头和jacks略微大于RJ-11电话连接头和jacksFiber Connector Port7UTPRJ-45连接头188Pair 4 R41234567线对(T is Tip R is Ring)Pair 3 T2Pair 3 R2Pair 2 T3Pair 1 R1Pair 1 T1Pair 2 R3Pair 4 T4针8UTP-直连线两端线序相同Pin Label1RD+2RD-3TD+4NC5NC6TD-able 10BaseT/100BaseTx Straight-throughPin Label1TD+2TD-3RD+4NC5NC6RD-7NC8NCServer/Router8 1wggbwowbobrwbr18直连线81Hub/Switch8 1wggbwowbobrwbr9UTP-交叉线两端线序交叉8 1woobwgwbgbrwbrCable 10BaseT/100BaseT CrossoverPin Label1RD+2RD-3TD+4NC5NC6TD-7NC8NCPin Label1RD+2RD-3TD+4NC5NC6TD-7NC8NC交叉线181881wggwbwobobrwbrHub/SwitchHub/Switch10UTP-直连线和交叉线的应用Use straight-through when only one port is designated with an