基于同名的Cisco全球培训课程，针对CCNA考试，本书内容涵盖了ICND课程的所有主题。全书分为五大部分：
·Cisco网络基础，包括设备的装配、布线、操作、配置和管理；
·Catalyst交换机互联，主要讲述基本交换操作与VLAN配置；
·Cisco路由器互联，包括TCP/IP、IP路由、流量管理以及 IPX配置；
·将网络扩展成WAN，包括序列对等连接、ISDN BRI、PVC连接帧延迟；
·附录，包括AppleTalk、**终端、Cisco700系列路由器、口令恢复技术。
另外，每章*后配有复习题，帮助你更好地理解关键概念。
本书可以帮助读者顺利通过Cisco CCNA认证考试，也可以作为网络互联领域工作的参考书籍。

Part I Getting Started with Cisco Networks
Chapter 1 Internetworking Concepts Overview
Defining Network Components
Mapping Business Needs to a Hierarchical Model
Access Layer
Distribution Layer
Core Layer
OSI Reference Model Overview
Upper Layers
Lower Layers
Communicating Between OSI Reference Model Layers
Physical Layer Functions
Physical Media and Connectors
Collision/Broadcast Domains
Data Link Layer Functions
MAC Sublayer Frames
LLC Sublayer Frames
Data Link Layer Devices
Network Layer Functions
Network Layer Addresses
Router Operation at the Network Layer
Transport Layer Functions
OSI Lower Layer Review
Selecting Cisco Products
Cisco Hub Products
Catalyst Switch Products
Cisco Router Products
Summary
Review Questions
Chapter 2 Assembling and Cabling Cisco Devices
Cabling the LAN
LAN Physical Layer Implementations
Positioning Ethernet in the Campus
Comparing Ethernet Media Requirements
Differentiating Between Connections
UTP Implementation
Cabling the Campus
Cabling the WAN
WAN Physical Layer Implementations
Differentiating Between WAN Serial Connections
Cabling Routers for Serial Connections
Cabling Routers for ISDN BRI Connections
Setting Up Console Connections to Cisco Devices
Summary
Review Questions
Chapter 3 Operating and Configuring a Cisco IOS Device
Basic Operation of Cisco IOS Software
Operations upon Router/Switch Startup
Router/Switch Configuration Locations
IOS Command Modes
What Happens When You Start a Switch
Catalyst Switch Status LEDs
Logging On to a 1900 Switch After Startup
Keyboard Help in Switch Command-Line Interface
Context-Sensitive Help for Switches
Console Error Messages for Switches
Command History Buffer for Switches
Commands to Get Basic Switch Information
show version Command
show running-configuration Command
show interfaces Command
show ip Command
Configuring the Switch from the Command Line
What Happens When You Start a Router
Initial Router Configuration
Modifying Router Configuration
Keyboard Help in Router Command-Line Interface
Context-Sensitive Help for Routers
Console Error Messages for Routers
Command History Buffer for Routers
Using CLI Help Features Example
Enhanced Editing Mode：Editing Key Functions
Commands to Get Basic Router Information
show version Command
show running-configuration and show startup-configuration Commands
Configuring a Router from the Command Line
Additional Useful Console Commands
Configuring Router Interfaces
Summary
Review Questions
Chapter 4 Managing Your Network Environment
……
Part II Interconnecting Catalyst Switches
Part III Interconnecting Cisco Routers
Part IV Extendingthe Network to WANs
Part V Appendixes
Appendix A Configuring AppleTalk
Appendix B Establishing a HyperTerminal Session
Appendix E Answers to Review Questions

在学习Cisco网络建立、配置、维护与故障排除基础的同时，帮助读者准备CCNA认证考试；
决定在何种情况下使用集线器、以太网交换机或路由器更合适；
在多层Cisco设备互连的网络中使用Cisco软件标识地址、协议和连接状态；
根据指定的网络设计规范互连Cisco交换机与路由器；
配置Cisco交换机和路由器支持指定的协议与技术列表；
配置访问列表来控制网络设备的访问或网段和一段网络的流量；
验证Cisco交换机、路由器以及他们的网络协议和服务设置在给定的网络中是否如期运行。
《Cisco网络设备互连》是Cisco公司认可的CCNA学习用书。本书为你提供从小型到中型企业的*好Cisco**解决方案所需知识，并教给你所有的基本设置程序来组建多路由器。多组互联网络，采用*常用的路由和路由选择协议的LAN和WAN接口。
本书提供了安装和配置Cisco产品所需的安装、配置和故障排队的信息。你将从以下五部分学到Cisco网络设备互连的基础知识：Cisco网络基础（设备的装配、布线、操作、配置和管理）；Catalyst交换互连（基本交换操作与VLAN配置）；Cisco路由器互连（TCP/IP、IP路由、流量管理、IPX配置）；将网络扩展成WAN（串行对等连接、ISDN BRI、帧中继PVC连接）以及附录（AppleTalk、**终端、Cisco700系列路由器、口令恢复技术）。每章后还配有复习题，帮你理解关键概念，并助你踏上获得CCNA认证之路。