本书包含有关路由模型，进程和设计的翔实的技术细节，可以作为设计，实现或支持基于TCP、IP、IPX、SPX，APPLETALK，SNA，DECNET和BANYAN VINES协议的网络互连的参考手册。本书主要包括三部分：介绍网络互连的相关概念和理论，主要介绍物理层，数据链路层，网络层的协议以及基本路由器的配置；详细介绍TCP、IP协议，也包括NOVEL IPX，APPLETALK协议的配置方法等；介绍WAN的通信，包括WAN的连接，X25和帧中继的配置等。

本书特别适合于参加CCNA考试的读者。Cisco公司把本书作为CCNA的正式课本。对于其他读者，本书可以使他们增加对影响网络通信和安全的基础理论的理解。

PART 1 INTRODUCTION TO INTERNETWORKING

Chapter 1 The Internetworking Model

Chapter 2 Applications and Upper Layers

Chapter 3 Physical and Data Link Layers

Chapter 4 Network Layer and Path Determination

Chapter 5 Basic Router Operations

Chapter 6 Configuring a Router

Chapter 7 Discovering and Accessing Other Cisco Routers

PART 2 NETWORKING PROTOCOL SUITES

Chapter 8 TCP/IP Overview

Chapter 9 IP Addressing

Chapter 10 IP Routing Configuration

Chapter 11 Configuring Novell IPX

Chapter 12 Configuring Apple Talk

Chapter 13 Basic Traffic Management with Access Lists

PART 3 WIDE-AREA NETWORKING

Chapter 14 Introduction to WAN Connections

Chapter 15 Configuring X.25

Chapter 16 Configuring Frame Relay

APPENDIXES

The strategic importance of interconnected networks was quickly realized,Organizations began to move toward linking previously isolated LANs,as shown in Figure 1-2.