1、 2007 Cisco Systems, Inc. All rights reserved. Cisco PublicITE PC v4.0Chapter 1 1Cisco-CCNACisco | Network, following the Thinking of ThinkMo!ITE PC v4.0Chapter 1 2 2007 Cisco Systems, Inc. All rights reserved. Cisco Public现代网络需求 ：ITE PC v4.0Chapter 1 3 2007 Cisco Systems, Inc. All rights reserved.
2、Cisco Public企业网络结构ITE PC v4.0Chapter 1 4 2007 Cisco Systems, Inc. All rights reserved. Cisco Public常见网络介质：ITE PC v4.0Chapter 1 5 2007 Cisco Systems, Inc. All rights reserved. Cisco Public常见网络介质 ：ITE PC v4.0Chapter 1 6 2007 Cisco Systems, Inc. All rights reserved. Cisco Public常见网络介质：ITE PC v4.0Chapte
3、r 1 7 2007 Cisco Systems, Inc. All rights reserved. Cisco Public10-BASE-T 100-BASE-TX 1000-BASE-TX 根据双绞线质量可分为不同规范 1， 2， 3， 4， 5，超 5， 6， 7类 8类正在开发中规范即将形成 双绞线接口被称为 RJ-45及 RJ-11双绞线的常用规范ITE PC v4.0Chapter 1 8 2007 Cisco Systems, Inc. All rights reserved. Cisco Public双绞线的种类ITE PC v4.0Chapter 1 9 2007 Cisco Systems, Inc. All rights reserved. Cisco Public双绞线的线序TIA/EIA 568B白橙 橙 白绿 蓝 白蓝 绿 白棕 棕TIA/EIA 568A白绿 绿 白橙 蓝 白蓝 橙 白棕 棕直通线： 568B-568B交叉线： 568A-568B反转线：线序翻转ITE PC v4.0Chapter 1 10 2007 Cisco Systems, Inc. All rights reserved. Cisco Public双绞线的线序、直通线：交叉线：
