Internet
The Internet is a technology and electronic communication system such as the world has never seen before. In fact, some people have said that the Internet is the most important innovation since the development of the printing press.
History of the Internet
The Internet was created as a result of the Cold War. In the mid 1960s it became apparent that there was a need for a bomb-proof electronic communication system. A concept was devised to link computers by cable or wire throughout the country in a distributed system so that if some parts of the country were cut off from other parts, messages could still get through. In the beginning, only the federal government and a few universities were linked because the Internet was basically an emergency military communication system, operated by the Department of Defense's Advanced Research Project Agency (ARPA). The whole operation was referred to as ARPANET.
ARPA was linked to computers at a group of top research universities receiving ARPA funding. The first four universities connected to ARPANET were the University of California-Los Angeles, Stanford University, the University of California-Santa Barbara, and the University of Utah. Thus, the Internet was born. Because of a concept developed by Larry Roberts of ARPA and Glen Kleinrock at UCLA, called packet switching, the Internet was able to become a decentralized system, which would prevent large-scale destruction of any centralized system. The system allowed different types of computers from different manufacturers to send messages to one another. Computers merely transmitted information to one another in a standardized protocol packet. The addressing information in these packets told each computer in the chain where the packet was supposed to go.
As the Internet grew, more capability was added. A program called Telnet allowed remote users to run programs and computers at other sites. The File Transfer Protocol (FTP) allowed users to transfer data files and programs. Gopher programs, developed at the University of Minnesota and named after the university's mascot, allowed menu-driven access to data resources on the Internet. Search engines such as Archie and Wide Area Index Search (WAIS) gave users the ability to search the Internet's numerous libraries and indices. By the 1980s people at universities, research laboratories, private companies, and libraries were aided by a networking revolution. There were more than thirty thousand host computers and modems on the Internet. The fore-runner of the Internet was the Bitnet, which was a network of virtually every major university in the world. E-mail became routine and inexpensive, since the Internet is a parasite using the existing multibillion-dollar telephone networks of the world as its carriers.
In 1972 Ray Tomlinson invented network e-mail, which became possible with the FTP. With e-mail and FTP, the rate at which collaborative work could be conducted between researchers at participating computer science departments was greatly increased. Although it was not realized at the time, the Internet had begun. TCP (Transmission Control Protocol) breaks large amounts of data down into packets of a fixed size, sequentially numbers them to allow reassembly at the recipient's end, and transmits the packets over the Internet using the Internet protocol.
After the invention of e-mail, it wasn't long before mailing lists were invented. This was a technique by which an identical message could be sent automatically to large numbers of people. The Internet continues to grow. In fact, it is estimated that almost 65 million adults go online on the Internet in the United States every month. Presently, no one operates the Internet. Although there are entities that oversee the system, "no one is in charge." This allows for a free transfer and flow of information throughout the world.
In 1984 the National Science Foundation (NSF) developed NSFNET. Later NASA, the National Institutes of Health, and others became involved, and nodes on the Internet were divided into basic varieties that are still used today. The varieties are grouped by the six basic Internet domains of GOV, MIL, EDU, COM, ORG, and NET. The ARPANET itself formally expired in 1989, a victim of its own success, and the use of TCP/IP (Transfer Control Protocol/Internet Protocol) standards for computer networks is now global.
If Internet invention had stopped at this point, we would probably still be using the Internet primarily just for e-mail. However, in 1989 a second miracle occurred. Tim Berners-Lee, a software engineer at the CERN physics lab in Switzerland, developed a set of accepted protocols for the exchange of Internet information, and a consortium with users was formed—thus creating the World Wide Web, the standard language for encoding information. Hypertext Markup Language (HTML) was adopted. Berners-Lee proposed making the idea global to link all documents on the Internet using hypertext. This lets users jump from one document to another through highlighted words. Other web standards, such as URL (Universal Resource Language) addresses on the Web page and HTTP (Hypertext Transfer Protocol), are also Berners-Lee's inventions. Berners-Lee could have been exceedingly rich based on his invention, but he left the fortune-building to others because he "wanted to do the revolution right."
As a result of Berners-Lee's invention, in 1993 a group at the University of Illinois, headed by Mark Andreesen, wrote a graphical application called Mosaic to make use of the Web easier. The next year a few students from that group, including Andreesen, co-founded Netscape after they graduated in May and released the browser for the World Wide Web in November 1994. The World Wide Web is making the Internet easier to use and has brought two giant advantages. Until the Web, the Internet communicated text only, but the Web permits exchange of uncoded graphics, color-coded graphics, color photographs and designs, even video and sound; and it formats typed copy into flexible typographic pages. The Web also permits use of hyperlinks, whereby users can click on certain words or phrases and be shown links to other information or pictures that explain the key words or phrases. As a result of the World Wide Web and Web browsers, it became easy to find information on the Internet and the Web. Various search engines have been developed to index and retrieve this information.
Using the Internet
How does one use the Internet? First, one must have a computer with a connection to the outside world either by a modem connection, a fiber connection such as used in local cable television, or a wireless connection, which is becoming more important. The user is then connected to a system of linked computer networks that encircle the globe, facilitating a wide assortment of data communication services including e-mail, data and program file transfers, newsgroups and chatgroups, as well as graphic images, sound, and video of all kinds. One must choose the right tool to accomplish each task. Thus, one needs to understand the tools to travel this information superhighway.
The Internet is in cyberspace; think of it as a number of planets, each with a unique kind of data program or other type of information service. The only hitch is that each planet's communicating language is different, and one needs several communicating applications and tools. A person is responsible for selecting the proper software program or utility to access what he or she wants. Each program performs a specific task, ranging from providing basic connections, to accessing resources, to preparing e-mail. Common Internet tools include the following:
Connection and log-on software. This software provides access to logon to cyber-space. The software sets up the connections to the Internet. This software is usually provided by an Internet service provider.
Web browser. Web browsers are usually free. The most common Web browsers are Microsoft's Internet Explorer and Netscape's Navigator. These software programs can usually be downloaded free of charge; they also come with office suites such as Microsoft Office.
E-mail manager and editor. To communicate by e-mail users must have an e-mail manager and editor. This editor creates, sends, receives, stores, and organizes your e-mail. Again, many of these e-mail editors can be downloaded free from the Web. One of the most common editors is Eudora. However, office suites usually come with an e-mail manager as well.
A custom connect program starts the procedure for logging on to the Internet using TCP/IP. This is a set of standards and protocols for sharing data between computers and the Internet. Once the protocols have connected, a user must establish his or her identity and authorization to use the Internet services. The Internet service provider used has its own identity on the Internet, and this identity is known as a domain. Domain names, as mentioned previously, are all names listed to the right of the @ sign in the address with an extension such as .com or .edu. The computer then sends and receives data from a host computer over the Internet. A program such as Telnet breaks up the data into packets. The protocols specify how packets should be layered, or packaged. Different layers of packets address a variety of software and hardware needs to send information over different networks and communication links. After a user has properly logged on, he or she can begin using the Internet services.
After a user has completed an on-line work session, he or she must logoff the Internet and, depending on the circumstances, disconnect from the Internet service provider. If a user is using an educational service provider such as a college or other educational institution, he or she probably logs off but does not disconnect, since the service is a virtual service provided to many others at the terminal or computer. If one is using a private commercial service provider, one must be sure that a complete disconnection has been made between the computer and provider or one may still be paying fees.
The Internet has spawned an entirely whole new industry called electronic commerce or sometimes electronic business. Businesses sell to other businesses and to consumers on the Internet using secure Web sites. The current market value of U.S. companies with substantial Internet revenue via e-commerce exceeds $3 trillion and is growing annually. It is estimated that by 2003 over 88 percent of all businesses will derive some of their revenue from e-commerce. It has also been said that the growth of the Internet and e-commerce has been one of the main causes of the robust economy in the United States.
Thus, the Internet has been one of the most productive technologies in recent history. The Internet can transport information from nearly any place on the globe to nearly any other place in seconds. The Internet has changed people's notion of how fast things happen. People say now they "did it in Internet time," meaning something was done in a fraction of the traditional or expected amount of time. The Internet is becoming a major cause of time compression.
Future of the Internet
What does the future hold for the Internet? Predictions are that in the future nearly every Internet-connected device will communicate wirelessly. Low-power radio cells rather than fiber or copper wire, will connect and relay information. Before 2010, more than half of American homes will have at least one low power radio cell connected to Internet bandwidth. The future appears to hold a wireless Internet because of bandwidth problems with cable or wire.
The personal computer will continue to evolve, but there will be a lot of other Internet-smart appliances. Predictions are that there will be Internet wristwatches to match the person with the message. Televisions will, when prompted, record our favorite shows. Various kitchen appliances will start by Internet commands. The personal automobile will also be a mobile personal information store. Automobiles will have internal connectivity and easily carry a very large cache of favorite music, talk, interactive games, and pictures, while passengers will have the option of looking out the window at the real world or looking in the window of their in-car display. Like the explorers who discovered new continents, people are just beginning to discover the full impact of the Internet on information, space, and time.
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