文件名称:
Computer+Networking+A+Top-Down+Approach+Featuring+The+Internet
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文件大小: 9mb
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上传时间: 2010-01-15
详细说明： Welcome to our online textbook, Computer Networking: A Top-Down Approach. We ( Jim Kurose, Keith Ross, and Addison-Wesley-Longman) think you will find this textbook to be very different than the other computer networking books that are currently available. Perhaps the most unique and innovative feature of this textbook is that it is online and accessible through a Web browser. We believe that our online format has several things going for it. First, an online text can be accessed from any browser in the world, so a student (or a ny other reader) can gain access to the book at anytime from anyplace. Second, as all of us Internet enthusiasts know, much of the best material describing the intricacies of the Internet is in the Internet itself. Our hyperlinks, embedded in a coherent context, provide the reader direct access to some of the best sites relating to computer networks and Internet protocols. The links do not only point to RFCs but also to sites that are more pedagogic in nature, including home-brewed pages on particular aspects of Internet technology and articles appearing in online trade magazines. Being online also allows us to include many interactive features, including direct access to the Traceroute program, direct access to search engines for Internet Drafts, Java applets that animate difficult concepts, and (in the near future) direct access to streaming audio. Being online enables us to use more fonts and colors (both within the text and in diagrams), making the text both perky and cheerful. Finally, an online format will allow us to frequently release new editions (say, every year), which will enable the text to keep pace with this rapidly changing field. Another unusual feature of the text is its Internet focus. Most of the existing textbooks begin with a broader perspective and address the Internet as just as one of many computer network technologies. We instead put Internet protocols in the spotlight, and use the Internet protocols as motivation for studying some of the more fundamental computer networking concepts. But why put the Internet in the spotlight, why not some other networking technology such as ATM? Most computer networking students have had already significant "hands on" experience with the Internet (e.g., surfing the Web and sending e-mail at the very least) before taking a course on computer networks. We have found that modern-day students in computer science and electrical engineering, being intensive users of the Internet, are enormously curious about what is under the hood of the Internet. Thus, it is easy to get students excited about computer networking when using the Internet as your guiding vehicle. A second reason for the Internet focus is that in recent years computer networking has become synonymous with the Internet. This wasn't the case five-to-ten years ago, when there was a lot of talk about ATM LANs and applications direclty interfacing with ATM (without passing through TCP/IP). But we have now reached the point where just about all data traffic is carried over the Internet or intranets. Furthermore, streaming audio and video have recently become commonplace in the Internet, and someday telephony may be too. Because our book has an Internet focus, it is organized around a five-layer Internet architecture rather than around the more traditional seven-layer OSI architecture. ...展开收缩
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