Internet技术基础（英文影印版·第4版）
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douglas comer是著名的网络技术作家、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。..
远程安全接入(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，以及关子网络安全性的讨论。
·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。
“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重点突出。……本书是适合网络初学者的一本优秀教材。”.
——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
本书主要特色
·三大新增章节：
nat：介绍因特网的连接。..
远程安全接入(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，以及关子网络安全性的讨论。
·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。
“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重点突出。……本书是适合网络初学者的一本优秀教材。”.
——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
作译者回到顶部↑
本书提供作译者介绍
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，该委员会是确定因特网发展标准的权威机构；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。...
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目录回到顶部↑
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
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
前言回到顶部↑
The Intemet Book explains how computers communicate, what the Intemet is, how the Intemet works, and what services the Intemet offers. It is designed for readers who do not have a strong technical background -- early chapters clearly explain the terminology and concepts needed to understand all the services. When you finish reading,you will understand the technology behind the Intemet, will appreciate how the Intemet can be used, and discover why people find it so exciting. In addition, you will understand the origins of the Intemet and see how rapidly it has grown. .
Instead of using mathematics, algorithms, or computer programs, the book uses analogies from everyday life to explain technology. For example, to explain why digit,al communication is superior to analog, the text uses an analogy of sending signals through fog with a flashlight. To explain how audio can be played back for the user at a steady rate when packets arrive in clumps, the text uses the analogy of many gallons of milk arriving at a supermarket in one shipment, but being sold one gallon at a time.
In addition to explaining the services users encounter such as email, file download,instant messaging, and web browsing, the text covers key networking concepts such as packet Switching, Local Area Networks, protocol software, and domain names. More important, the text builds on fundamentals -- it describes basic Intemet communication facilities first, and then shows how the basic facilities are used to provide a variety of services. Finally, the book includes an extensive glossary of technical terms with easyto-understand definitions; readers are encouraged to consult the glossary as they read.
The fourth edition retains the same general structure as the previous edition, but adds three new chapters (19, 26, and 32), and updates material throughout. Chapter 19 explains NAT, a technology many Intemet subscribers now have in their home.Chapter 26 explains blogs and wilds, two new Intemet applications. Chapter 32, the third new chapter, explains Virtual Private Networking, a technology that allows an employee to access a corporate network safely from an arbitrary remote location.
As with the previous edition, the book is divided into four main parts. The first part begins with fundamental concepts such as digital and analog communication. It also introduces packet switching and explains the Local Area Network technologies that are used in most businesses.
The second part of the book gives a short history of the Intemet research project and the development of the Intemet. Although most of the history can be skipped,readers should pay attention to the phenomenal growth rate, which demonstrates that the technology was designed incredibly well -- no other communication technology has remained as unchanged through such rapid growth. ..
The third part of the book explains how the Intemet works, including a description of the two fundmental protocols used by all services: the Intemet Protocol (IP) and the Transmission Control Protocol (TCP). Although they omit technical details, the chapters in this part allow students to understand the essential role of each protocol and gain perspective on the overall design.
The fourth part of the book examines services available on the Intemet. In addition to covering browsers, web documents, and search engines used with the World Wide Web, chapters discuss email, bulletin boards, file transfer, remote desktops, wikis,blogs, and audio and video communication. In each case, the text explains how the service operates and how it uses facilities in the underlying system. The fourth part concludes with a discussion of network security, Virtual Private Networks, and electronic commerce.
The Intemet Book makes an excellent reference text for a college-level course on the Intemet. Although presented in a nontechnical manner, the material is scientifically accurate. More important, in the twenty-first century, an educated person will need to know more than how to use a browser or set up a web page -- they should have some understanding of what goes on behind the scenes. They can acquire such knowledge from this text.
Instructors are encouraged to combine classroom lectures with laboratory sessions in which students see and use the technology ftrst-hand. In all courses, early labs should focus on exploring a variety of services, including sending email, using a browser, using a search engine, downloading files, listening to audio, and using an IP telephone, if one is available. I encourage all students, even those who have no interest in computers, to build a trivial web page by hand. In addition to helping them see the relationship between tags in an HTML document and the resulting display, it shows students how a server transfers files on a computer disk to a browser. Seeing the relationship in labs helps one better understand as they read about the underlying process.
Lab projects later in the semester depend on the type of course. Business-oriented courses often focus students on using the Intemet or constructing a case study -- labs
require students to search the Intemet for information and then write a paper that analyzes the information. Other courses use labs to focus on tools such as programs used to create a web page. Some courses combine both by having students search for information and then create a web page that contains links to the information. In any case, we have found that students enter Intemet courses with genuine enthusiasm and motivation; a professor's task is merely to provide perspective and remind students throughout the semester why the Intemet is so exciting.
The author thanks many people who have contributed to editions of this book.John Lin, Keith Rovell, Rob Slade, and Christoph Schuba read early versions and made suggestions. Dwight Barnette, George Polyzo, Donald Knudson, Dale Musser, and Dennis Ray sent the publisher reviews of a previous edition. Scott Comer provided perspective. As always, my wife, Christine, carefully edited the manuscript, solved many problems, and improved the wording. ...
Douglas E. Comer
August, 2006
Instead of using mathematics, algorithms, or computer programs, the book uses analogies from everyday life to explain technology. For example, to explain why digit,al communication is superior to analog, the text uses an analogy of sending signals through fog with a flashlight. To explain how audio can be played back for the user at a steady rate when packets arrive in clumps, the text uses the analogy of many gallons of milk arriving at a supermarket in one shipment, but being sold one gallon at a time.
In addition to explaining the services users encounter such as email, file download,instant messaging, and web browsing, the text covers key networking concepts such as packet Switching, Local Area Networks, protocol software, and domain names. More important, the text builds on fundamentals -- it describes basic Intemet communication facilities first, and then shows how the basic facilities are used to provide a variety of services. Finally, the book includes an extensive glossary of technical terms with easyto-understand definitions; readers are encouraged to consult the glossary as they read.
The fourth edition retains the same general structure as the previous edition, but adds three new chapters (19, 26, and 32), and updates material throughout. Chapter 19 explains NAT, a technology many Intemet subscribers now have in their home.Chapter 26 explains blogs and wilds, two new Intemet applications. Chapter 32, the third new chapter, explains Virtual Private Networking, a technology that allows an employee to access a corporate network safely from an arbitrary remote location.
As with the previous edition, the book is divided into four main parts. The first part begins with fundamental concepts such as digital and analog communication. It also introduces packet switching and explains the Local Area Network technologies that are used in most businesses.
The second part of the book gives a short history of the Intemet research project and the development of the Intemet. Although most of the history can be skipped,readers should pay attention to the phenomenal growth rate, which demonstrates that the technology was designed incredibly well -- no other communication technology has remained as unchanged through such rapid growth. ..
The third part of the book explains how the Intemet works, including a description of the two fundmental protocols used by all services: the Intemet Protocol (IP) and the Transmission Control Protocol (TCP). Although they omit technical details, the chapters in this part allow students to understand the essential role of each protocol and gain perspective on the overall design.
The fourth part of the book examines services available on the Intemet. In addition to covering browsers, web documents, and search engines used with the World Wide Web, chapters discuss email, bulletin boards, file transfer, remote desktops, wikis,blogs, and audio and video communication. In each case, the text explains how the service operates and how it uses facilities in the underlying system. The fourth part concludes with a discussion of network security, Virtual Private Networks, and electronic commerce.
The Intemet Book makes an excellent reference text for a college-level course on the Intemet. Although presented in a nontechnical manner, the material is scientifically accurate. More important, in the twenty-first century, an educated person will need to know more than how to use a browser or set up a web page -- they should have some understanding of what goes on behind the scenes. They can acquire such knowledge from this text.
Instructors are encouraged to combine classroom lectures with laboratory sessions in which students see and use the technology ftrst-hand. In all courses, early labs should focus on exploring a variety of services, including sending email, using a browser, using a search engine, downloading files, listening to audio, and using an IP telephone, if one is available. I encourage all students, even those who have no interest in computers, to build a trivial web page by hand. In addition to helping them see the relationship between tags in an HTML document and the resulting display, it shows students how a server transfers files on a computer disk to a browser. Seeing the relationship in labs helps one better understand as they read about the underlying process.
Lab projects later in the semester depend on the type of course. Business-oriented courses often focus students on using the Intemet or constructing a case study -- labs
require students to search the Intemet for information and then write a paper that analyzes the information. Other courses use labs to focus on tools such as programs used to create a web page. Some courses combine both by having students search for information and then create a web page that contains links to the information. In any case, we have found that students enter Intemet courses with genuine enthusiasm and motivation; a professor's task is merely to provide perspective and remind students throughout the semester why the Intemet is so exciting.
The author thanks many people who have contributed to editions of this book.John Lin, Keith Rovell, Rob Slade, and Christoph Schuba read early versions and made suggestions. Dwight Barnette, George Polyzo, Donald Knudson, Dale Musser, and Dennis Ray sent the publisher reviews of a previous edition. Scott Comer provided perspective. As always, my wife, Christine, carefully edited the manuscript, solved many problems, and improved the wording. ...
Douglas E. Comer
August, 2006
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