第2章 安装Cisco设备.ppt

第二章安装Cisco设备 本章目标 通过本章的学习，您应该掌握以下内容: 能够识别路由器或交换机之间连接所需要的连接组件，并能正确连接 能够识别通过串口或ISDN BRI口连接WAN所需要的连接组件，并能正确连接 在路由器或交换机与一个终端之间建立控制台连接 连接典型网络 LAN的物理层实现 典型网络中的以太网定位 以太网介质比较 区分不同的连接类型 Unshielded Twisted Paired(UTP) UTP实现直连线 UTP实现交叉线 UTP直连线与交叉线对比 连接典型网 连接广域网 WAN物理层实现 区分不同的WAN串行连接器 串行连接中的DTE和 DCE比较 DTE/DCE—责任分界点 固化的端口 模块化端口 控制台连接 本章总结 通过本章的学习，您应该掌握以下内容: 能够识别路由器或交换机之间连接所需要的连接组件，并能正确连接 在路由器或交换机与一个终端之间建立控制台连接 问题回顾 1. 说明实现以太局域网所基于的三个标准. 2. 如果需将交换机之间的连接升级到100BaseT, 应该选择什么线类? 3. 判断下列引脚情况是直连线或交叉线或翻转线? 4. 下列各类连接器分别可用于哪些介质? Purpose: This figure illustrates the different ports used in Ethernet. Emphasize: RJ-45 ports are common on Cisco platforms. Some devices also offer DB-15 interfaces for AUI. If the cable is fiber, the port will look different. Point each port out to the students. Note: If you have devices available that have the various ports, show the actual ports to your students. Purpose: This figure illustrates an unshielded twisted-pair RJ-45 connector. Emphasize: the RJ-45 has eight pins. Some are for tip (T) and some for ring(R). Emphasize: Make sure each student has seen a Cat 5 cable. Describe the test for straight through cable determination. If you hold the two ends of an RJ-45 cable side by side, youll see eight colored strips, or pins, at each end. If the order of the colored pins is the same at each end, then the cable is straight through. If the order of the colors is reversed at each end, then the cable is crossed over or rolled. Straight-thru Ethernet uses pins 1, 2, 3, and 6. Straight-thru cables are used for switch to router cabling, switch to PC or server cabling, or hub to PC or server cabling. Emphasize: Make sure each student has seen a Cat 5 cable. Describe the test for crossover cable determination. If you hold the two ends of an RJ-45 cable side by side, youll see eight colored strips, or pins, at each end. If the order of the colored pins is the same at each end, then the cable is straight through. If the order of the colors is reverse