内容简介

本书是神州数码DCNP（神州数码认证网络工程师）认证考试的指定教材。本书主要内容包括交换网络的技术实现、园区网实现VLAN、园区网实现冗余链路、多层交换机的路由实现、多层交换设备实现、园区网高可用性、园区网服务质量和IP组播。

本书可作为各类职业院校计算机应用技术和计算机网络技术专业的教材，也可作为交换机和网络维护的指导书，还可作为计算机网络工程技术岗位培训的参考用书。

本书配有微课视频，读者可扫描书中二维码进行观看。

本书配有电子课件，选择本书作为授课教材的教师可以登录机械工业出版社教育服务网（www.cmpedu.com）免费注册后下载或联系编缉（010-88379194）资询。

  目录

目 录

前言

二维码索引

*1章 交换网络的技术实现 ...................................................................................................1

1.1 传统以太网 ...........................................................................................................................1

1.2 交换网络的现状 ...................................................................................................................5

1.3 交换网络的发展趋势 ...........................................................................................................9

1.4 交换网络设计分层模型 .....................................................................................................10

1.5 交换网络设计分层实例 .....................................................................................................11

1.6 本章小结 .............................................................................................................................19

1.7 习题 .....................................................................................................................................19

*2章 园区网实现VLAN...........................................................................................................20

2.1 VLAN技术 ..........................................................................................................................20

2.2 VLAN技术及其应用 ..........................................................................................................22

2.3 端口MAC绑定 ....................................................................................................................25

2.4 本章小结 .............................................................................................................................26

2.5 习题 .....................................................................................................................................26

第3章 园区网实现冗余链路 .................................................................................................27

3.1 生成树协议的演化 .............................................................................................................27

3.2 快速生成树协议 .................................................................................................................32

3.3 多生成树协议 .....................................................................................................................40

3.4 生成树的保护机制 .............................................................................................................43

3.5 避免转发环路和黑洞 .........................................................................................................43

3.6 链路聚合 .............................................................................................................................45

3.7 本章小结 .............................................................................................................................48

3.8 习题 .....................................................................................................................................49

第4章 多层交换机的路由实现 .............................................................................................50

4.1 多层交换机功能概述 .........................................................................................................50

4.2 多层交换设备的直连网络 .................................................................................................50

4.3 多层交换设备的静态路由 .................................................................................................52

4.4 多层交换设备的动态路由 .................................................................................................56

4.5 VLAN间路由 ......................................................................................................................60

4.6 本章小结 .............................................................................................................................63

4.7 习题 .....................................................................................................................................63

第5章 多层交换设备实现.......................................................................................................64

5.1 多层交换设备的分类 .........................................................................................................64

5.2 二层交换设备的交换原理 .................................................................................................64

5.3 多层交换设备的交换原理 .................................................................................................69

5.4 本章小结 .............................................................................................................................82

5.5 习题 .....................................................................................................................................82

第6章 园区网高可用性...........................................................................................................84

6.1 虚拟路由的应用 .................................................................................................................84

6.2 虚拟冗余路由协议（VRRP） ...........................................................................................86

6.3 热备份路由协议（HSRP） ...............................................................................................90

6.4 Syslog ..................................................................................................................................92

6.5 简单网络管理协议（SNMP） ..........................................................................................93

6.6 本章小结 .............................................................................................................................94

6.7 习题 .....................................................................................................................................94

第7章 园区网服务质量...........................................................................................................96

7.1 园区网QoS概述 ..................................................................................................................96

7.2 交换机中的QoS实现 ........................................................................................................103

7.3 QoS配置 ............................................................................................................................107

7.4 本章小结 ............................................................................................................................111

7.5 习题 ...................................................................................................................................112

第8章 IP组播............................................................................................................................113

8.1 IP组播简介 ........................................................................................................................113

8.2 组播成员协议 ...................................................................................................................117

8.3 组播路由选择协议 ...........................................................................................................123

8.4 组播配置 ...........................................................................................................................130

8.5 本章小结 ...........................................................................................................................131

8.6 习题 ...................................................................................................................................131

习题答案......................................................................................................................................134

参考文献......................................................................................................................................135