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How the Internet Works, Millennium Edition
     

How the Internet Works, Millennium Edition

by Preston Gralla, Leonhard Gralla
 
Have you ever wanted to know how data travels from computer to computer, around the world? Have you ever wondered how Web sites can track users or how newsgroups work? How the Internet Works shows you how with easy-to-follow, four-color visual spreads tracking the path data flows and the hardware involved. Now entering its fourth year, How the Internet Works helps

Overview

Have you ever wanted to know how data travels from computer to computer, around the world? Have you ever wondered how Web sites can track users or how newsgroups work? How the Internet Works shows you how with easy-to-follow, four-color visual spreads tracking the path data flows and the hardware involved. Now entering its fourth year, How the Internet Works helps you understand the latest in Internet and networking technology from cookies and data tracking to Web sound and video. Its intelligent visual approach demystifies the technology in a format that appeals to readers of all levels. Content includes explanations of digital certificates, extranets, Internet telephony, and meta-searches and scripting languages such as XML and dynamic HTML.

Product Details

ISBN-13:
9780789721327
Publisher:
Que
Publication date:
09/23/1999
Series:
How It Works Series
Edition description:
Older Edition
Pages:
336
Product dimensions:
8.02(w) x 9.87(h) x 0.82(d)

Read an Excerpt


Chapter 1: The Wired World of the Internet

One of the most frequently asked questions about the Internet is: Who runs it? The truth is that no centralized management of the Internet exists. Instead, it is a collection of thousands of individual networks and organizations, each of which is run and paid for on its own. Each network cooperates with other networks to direct Internet traffic so that information can pass among them. Together, these networks and organizations make up the wired world of the Internet. For networks and computers to cooperate in this way, however, a general agreement must take place about things such as Internet procedures and standards for protocols. These procedures and standards are laid out in RFCs (requests for comment) agreed upon by Internet users and organizations.

A variety of groups guide the Internet's growth by helping to establish standards and by educating people on the proper way to use the Internet. Perhaps the most important is the Internet Society, a private, nonprofit group. The Internet Society supports the work of the Internet Activities Board (IAB), which handles much of the Internet's behind-the-scenes and architectural issues. The IAB's Internet Engineering Task Force is responsible for overseeing how the Internet's TCP/IP protocols evolve. (See Chapter 3, "How TCP/IP Works," for details on protocols.)

The World Wide Web Consortium (W3C) develops standards for the evolution of the fastest-growing part of the Internet, the World Wide Web. The W3C is an industry consortium run by the Laboratory for Computer Science at the Massachusetts Institute of Technology (MIT).

Private companies oversee the registeringof Internet domains, such as www. zdnet. com or www. mcp. com. These companies all must cooperate with one another and work in concert with a company called the InterNIC, which used to hold a monopoly on registering domains. InterNIC still maintains the central database of all domains registered, but now other companies are allowed to oversee registration of domains as well. These companies, called registrars, are overseen by a board made up of people from business, the government, and individual Internet users.

Although all these kinds of organizations are important as a kind of glue for holding together the Internet , at the heart of the Internet are individual local networks. These networks can be found in private companies, universities, government agencies, and online services. They are funded separately from one another and in a variety of manners, such as fees from users, corporate support, taxes, and grants. Many Internet service providers (ISPs), which provide Internet access for individuals, have networks as well. Individuals who want to access the Internet pay ISPs a monthly connection rate, so in that sense, everyone who uses the Internet helps pay for it.

The networks are connected in a variety of ways. For efficiency's sake, local networks join in consortiums known as regional networks. A variety of leased lines connect regional and local networks. The leased lines that connect networks can be as simple as a single telephone line or as complex as a fiber-optic cable with microwave links and satellite transmissions.

Private companies who make money by selling access to their lines build backbones, which are very high-capacity lines that carry enormous amounts of Internet traffic. Government agencies, such as NASA, and large private corporations pay for some of these backbones. The National Science Foundation also pays for some backbones. The federal government also funds a program called the Internet2, which is a very high-speed portion of the Internet now devoted to universities and researchers, but which may eventually be used by everyone else as well....

Meet the Author


Preston Gralla is the award-winning author of 12 books, including the best-selling How the Internet Works, The Complete Idiot's Guide to Buying a PC, and The Complete Idiot's Guide to Online Shopping. He has written about computer technology and the Internet and been a columnist for many magazines and newspapers, including USA Today, PC Magazine, the Los Angeles Times, Boston Magazine, PC/Computing, and FamilyPC Gralla has won several writing and editing awards, including one from the Computer Press Association for the best feature article in a computer magazine. He is a columnist for a national magazine about computers and the Internet, Access, which is distributed in major newspapers across the country.

Gralla is also Executive Editor for ZDNet, which is consistently rated the number one news and information site on the Internet. As a well-known expert on computers and the Internet, he has appeared frequently on numerous TV and radio shows, such as CBS This Morning, MSNBC, and ZDTVs Call for Help.

He was the founding managing editor of the well-known newspaper PC Week, and a founding editor of PC/Computing. Under his editorship, PC/Computlng was a finalist for General Excellence from the National Magazine Awards.

He lives in Cambridge, Massachusetts with his wife Lydia, children Gabriel and Mia, and a rabbit named Polichinelle. He also writes the free Gralla's Internet Insider email newsletter. To subscribe to it for free, send email to preston@gralla.com with the words SUBSCRIBE NETINSIDER on the subject.

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