The Internet Book, Fifth Editionexplains how computers communicate, what the Internet is, how the Internet works, and what services the Internet 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. It helps the reader to understand the technology behind the Internet, appreciate how the Internet can be used, and discover why people find it so exciting. In addition, it explains the origins of the Internet and shows the reader how rapidly it has grown. It also provides information on how to avoid scams and exaggerated marketing claims.



The first section of the book introduces communication system concepts and terminology. The second section reviews the history of the Internet and its incredible growth. It documents the rate at which the digital revolution occurred, and provides background that will help readers appreciate the significance of the underlying design. The third section describes basic Internet technology and capabilities. It examines how Internet hardware is organized and how software provides communication. This section provides the foundation for later chapters, and will help readers ask good questions and make better decisions when salespeople offer Internet products and services. The final section describes application services currently available on the Internet. For each service, the book explains both what the service offers and how the service works.



About the Author

Dr. Douglas Comer is a Distinguished Professor at Purdue University in the departments of Computer Science and Electrical and Computer Engineering. He has created and enjoys teaching undergraduate and graduate courses on computer networks and Internets, operating systems, computer architecture, and computer software. One of the researchers who contributed to the Internet as it was being formed in the late 1970s and 1980s, he has served as a member of the Internet Architecture Board, the group responsible for guiding the Internet's development. Prof. Comer is an internationally recognized expert on computer networking, the TCP/IP protocols, and the Internet, who presents lectures to a wide range of audiences. In addition to research articles, he has written a series of textbooks that describe the technical details of the Internet. Prof. Comer's books have been translated into many languages, and are used in industry as well as computer science, engineering, and business departments around the world. Prof. Comer joined the Internet project in the late 1970s, and has had a high-speed Internet connection to his home since 1981. He wrote this book as a response to everyone who has asked him for an explanation of the Internet that is both technically correct and easily understood by anyone. An Internet enthusiast, Comer displaysINTRNETon the license plate of his car.

互联网之书》第五版解释了计算机如何通信，互联网是什么，互联网如何工作，以及互联网提供哪些服务。它是为那些没有很强技术背景的读者设计的--早期章节清楚地解释了理解所有服务所需的术语和概念。它帮助读者了解互联网背后的技术，欣赏互联网的使用方法，并发现人们为什么会发现它如此令人兴奋。此外，它还解释了互联网的起源，并向读者展示了互联网的快速发展。它还提供了关于如何避免骗局和夸大的营销主张的信息。

本书的第一部分介绍了通信系统的概念和术语。第二部分回顾了互联网的历史和它令人难以置信的增长。它记录了数字革命发生的速度，并提供了有助于读者理解基础设计的意义的背景。第三部分描述了基本的互联网技术和能力。它研究了互联网硬件是如何组织的，软件是如何提供通信的。这一部分为后面的章节提供了基础，并将帮助读者在销售人员提供互联网产品和服务时提出好的问题并做出更好的决定。最后一节介绍了目前互联网上的应用服务。对于每一种服务，本书都解释了该服务所提供的内容以及该服务如何运作。

关于作者

道格拉斯-科默博士是普渡大学计算机科学和电子与计算机工程系的特聘教授。他创建了计算机网络和互联网、操作系统、计算机结构和计算机软件等本科生和研究生课程，并乐于教授这些课程。在20世纪70年代末和80年代互联网形成时，他是为互联网做出贡献的研究人员之一，曾担任互联网架构委员会的成员，该委员会负责指导互联网的发展。科默教授是国际公认的计算机网络、TCP/IP协议和互联网方面的专家，他为广泛的听众举办讲座。除研究文章外，他还撰写了一系列描述互联网技术细节的教科书。科默教授的书已被翻译成多种语言，并被世界各地的工业界以及计算机科学、工程和商业部门所采用。科默教授在20世纪70年代末加入了互联网项目，从1981年起，他的家里就有了高速互联网连接。他写这本书是为了回应那些要求他对互联网进行解释的人，这种解释在技术上是正确的，而且任何人都容易理解。作为一个互联网爱好者，科默在他的汽车牌照上显示INTRNET。