DouglasComer是**的网络技术作家、教师和顾问,他对因特网的概念和工作原理有其独到的见解和清晰的认识。在本书的第4版中,Comer教授从一种非技术化的角度来解释因特网后台的工作机制、计算机的通信方式、服务器以及因特网技术的原理。作者借助实用的方法,以清晰易懂且科学准确的语言介绍了因特网的各种技术及其不同的应用,向读者展示出网络互连和因特网的全景图。
本书主要特色
•三大新增章节:
NAT:介绍因特网的连接。
远程**接入(VPN)。
公司和个人网页(Wiki及Blog)。
•关键网络概念,如分组交换、局域网、协议软件和域名。
•全新的内容,包括Wi-Fi的无线联网技术、Web制作工具,以及关于网络**性的讨论。
•包括电子商务的概述以及如何利用网络进行业务和商业交易。
•采用更多易于理解的定义扩展了术语表的内容。

Preface
Chapter 1 The Internet Has Arrived
The World Has Changed
Numbers Do Not Tell The Story
Learning About The Internet
Understanding The Big Picture
Terminology And Technology
Growth And Adaptability
The Impact Of The Internet
Organization Of The Book
A Personal Note
Chapter 2 Getting Started: Hands-On Experience
Introduction
The Web: Sites And Pages
Web Browsers and Browsing
Using A Browser
Examples Of Web Sites And Services
Internet Search
Summary
Chapter 3 Telephones Everywhere
Introduction
A Communication Service
Selling Communication
Limited Access
High Cost
The Difficult Transition
Ubiquitous Access
Relevance To The Internet
Chapter 4 The World Was Once Analog
Introduction
Sound, Vibrations, And Analog Recording
Analog Electronic Devices
Many Electronic Devices Are Analog
The First Analog Communication
Analog Is Simple But Inaccurate
Sending An Analog Signal Across A Wire
Digital Music
The Digital Revolution
Computers Are Digital
Digital Recording
Using Digital To Recreate Analog
Why Digital Music?
Summary
Chapter 5 The Once And Future Digital Network
Introduction
The World Was Previously Digital
A Telegraph Is Digital
Morse Code
Letters And Digits In Morse Code
Users Did Not Encounter Morse Code
Virtually Instant Communication
Speed Is Relative
The Telephone Became Digital
Relevance To The Internet
Binary Encoding Of Data On The Internet
Why Use Two Symbols?
Summary
Chapter 6 Basic Communication
Introduction
Communication Using Electricity
Signals On Wires
Information Coding
Modems Allow Two-Way Traffic
A Character Code For Digital Information
Detecting Errors
Summary
Chapter 7 The Local Area Network Arrives
Introduction
Motivation
Interchangeable Media
A Computer Consists Of Circuit Boards
Circuit Boards Plug Into A Computer
Connecting One Computer To Another
LAN Technologies
Connecting A Computer To A LAN
The Importance Of LAN Technology
Relationship To The Internet
PART II A Brief History Of The Internet
Chapter 8 Internet: The Early Years
Many Independent Networks
The Proliferation Of LANs
Facts About LANs
LANs Are Incompatible
Wide Area Technologies Exist
Few WANs, Many LANs
WANs and LANs Are Incompatible
The Desirability Of A Single Network
The Department Of Defense Had Multiple Networks
Connecting Disconnected Machines
The Internet Emerges
The ARPANET Backbone
Internet Software
The Name Is TCP/IP
The Shock Of An Open System
Open Systems Are Necessary
TCP/IP Documentation Is Online
The Military Adopts TCP/IP
Summary
A Personal Note
Chapter 9 Two Decades Of Incredible Growth
Introduction
Disseminating The Software
Meanwhile, Back In Computer Science
The Internet Meets UNIX
The U.S. Military Makes A Commitment
The Internet Doubles In Size In One Year
Every Computer Science Department
Graduate Students Volunteer Their Time
The IAB evolves
The IETF
Doubling Again In A Year
The Internet Improves Science
NSF Takes A Leadership Role
Target: All Of Science And Engineering
NSF’s Approach
The NSFNET Backbone
The ANS Backbone
Exponential Growth
A Commercial Assessment
The End Of Growth
Chapter 10 The Global Internet
Introduction
Early ARPA Netwos
Electronic Mail Amng Computers
BITNET And FIDONET
Networks In Europe
EBONE: The Internet In Europe
Backbones And Internet Hierarchy
Internet On All Continents
The World Of Internet after 1998
A Personal Note
Chapter 11 A Global Information Infrastructure
Chapter 12 Packet Switching
Chapter 13 Internet: A Network Of Networks
Chapter 14 ISPs: Broadband And Wireless Access
Chapter 15 IP: Software To Create A Virtual Network
Chapter 16 TCP: Software For Reliable Communication
Chapter 17 Clients + Servers = Distributed Computing
Chapter 18 Names For Computers
Chapter 19 NAT: Sharing An Internet Connection
Chapter 20 Why The Internet Works Well
Chapter 21 Electronic Mail
Chapter 22 Bulletin Board Service (Newsgroups)
Chapter 23 Browsing The World Wide Web
Chapter 24 World Wide Web Documents (HTML)
Chapter 25 Advanced Web Technologies (Forms, Frames, Plugins, Java, JavaScript, Flash)
Chapter 26 Group And Personal Web Pages (Wikis And Blogs)
Chapter 27 Automated Web Search (Search Engines)
Chapter 28 Text, Audio, And Video Communication (IM, VoIP)
Chapter 29 Faxes, File Transfer, And File Sharing (FTP)
Chapter 30 Remote Login And Remote Desktops (TELNET)
Chapter 31 Facilities For Secure Communication
Chapter 32 Secure Access From A Distance (VPNs)
Chapter 33 Internet Economics And Electronic Commerce
Chapter 34 The Global Digital Library
Appendix 1 Glossary of Internet Terms
Index

“在可读性和清晰度方面,Douglas的表达力无出其右。本书的写作风格直接而且**突出。……本书是适合网络初学者的一本**教材。”
——Raymond Hsieh,纽约州立大学布法罗分校
“本书以一种简洁的语言向学生介绍了因特网,指出了关键所在及未来发展方向。”
——RobinPeek,西蒙斯学院

Douglas E. Comer Cisco公司研发副总裁,同时还是普度大学计算机科学系教授。他曾是因特网体系结构委员会的成员,该委员会确定因特网发展标准的权威结构;同时还是美国计算机学会的会员。除本书外,他还著有《TCP/IP网际互联》(3卷本)、《计算机网络和因特网》等。