本书是高校计算机专业教材，内容主要涵盖计算机网络基础知识，包括常见网络设备和原理、网络地址、网络服务和网络命令，以及网络设备的配置方法；网络设备配置时的接入方式以及用户模式；交换网络的部署技术，包括VLAN的管理与应用、交换机的端口安全、DHCP服务与中继、交换机端口镜像技术与生成树技术；路由器及路由协议，包括协议配置方法、工作原理、数据包格式、路由优化等；访问控制列表与网络地址转换的各种方式。本书通过实验来验证理论知识，更适合计算机网络知识初学者。

章 计算机网络基础··············································································· 1

1.1 常见的网络设备······································································································ 1

1.1.1 网卡.......................................................................................................... 1

1.1.2 交换机....................................................................................................... 3

1.1.3 路由器....................................................................................................... 9

1.2 常见的地址·········································································································· 12

1.2.1 IP地址.................................................................................................... 12

1.2.2 网卡地址................................................................................................. 15

1.3 常用网络命令······································································································· 17

1.3.1 ipcofig命令.............................................................................................. 17

1.3.2 get*c命令.............................................................................................. 18

1.3.3 ping命令................................................................................................. 19

1.3.4 tracert命令............................................................................................... 21

1.3.5 p*hping命令........................................................................................... 22

1.3.6 arp命令................................................................................................... 22

1.3.7 st*命令............................................................................................... 24

1.3.8 ftp命令.................................................................................................... 25

1.3.9 批处理命令.............................................................................................. 30

1.4 常见网络服务······································································································· 32

1.4.1 Web服务器部署....................................................................................... 32

1.4.2 FTP服务器部署....................................................................................... 34

第2章网络设备管理基础········································································· 37

2.1 通过Console端接入设备···················································································· 37

2.2 命令行配置基础···································································································· 39

2.2.1 问号指令................................................................................................. 39

2.2.2 指令的缩写与自动补全............................................................................ 40

2.2.3 常见命令行模式及切换............................................................................ 42

2.2.4 enable密码设置........................................................................................ 44

2.3 Tel/SSH远程登录管理设备················································································ 46

2.3.1 通过Tel登录设备................................................................................ 46

2.3.2 通过SSH登录设备.................................................................................. 48

2.4 Web方式登录设备································································································ 51

2.5 升级网络设备作系统·························································································· 54

2.5.1 使用TFTP进行交换机作系统升级........................................................ 54

2.5.2 使用FTP进行路由器作系统升级.......................................................... 59

第3章VLAN的配置与应用······································································ 63

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2章网络地址转换············································································ 268

12.1 静态地址转换···································································································· 268

12.2 动态地址转换···································································································· 272

12.3 端地址转换···································································································· 273

12.4 外部源地址转换································································································ 274

12.5 NAT实现负载均衡···························································································· 275

参考文献······························································································· 278