Презентация на тему" The internet"
презентация к уроку

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The Internet, a global computer network which embraces millions of users all over the world, began in the United States in 1969.

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The Internet, or the Net, as it is more often called in the English-speaking countries, is considered to be one of the most important inventions of the twentieth century. Some people say that it is like having thousands of consultants who are ready to answer any of your questions.

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It is a cheap and reliable source of information- and not only that.

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You can also send reliable source of information- and not only that. You can also send documents all over the world, sample new music, visit museums all over the world, read books, exchange letters with your friends in another continent and receive their answer in a quarter of an hour, sell and buy things, play games, read the latest news and do a lot of other things.

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But one shouldn’t treat the Net as means of amusement when there is nothing else to do. In fact, the Internet has nowadays become a very important means of business correspondence, financial transactions, marketing, and much more. In fact, in the nearest future it will become as (or more) important as fax or telephone.

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Information sent over internet takes the shortest path available from one computer to another, Because of this, any two computers on the Internet will be able to stay in touch with each other as long as there is a single route between them. This technology is called packet switching.

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The most popular Internet service is e-mail. Most of the people, who have access to the Internet, use the network only for sending and receiving e-mail messages. However, other popular services are available on the Internet: reading USENET News, using the World-Wide Web, telnet, FTP, and Gopher. e-mail

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In many developing countries the Internet may provide businessmen with a reliable alternative to the expensive and unreliable telecommunications systems of these countries. Commercial users can communicate over the Internet with the rest of the world and can do it very cheaply.

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However, some problems remain. The most important is security. When you send an e-mail message to somebody, this message can travel through many different networks and computers. It is possible to get into any of computers along the route, intercept and even change the data being sent over the Internet. In spite vof the fract that there are many strong encoding programs available,nearly all the information being sent over the internet is transmitted without any form of encoding, i.e. "in the clear". But when it becomes necessary to send important information over the network, these encoding programs may be useful.

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American banks and companies even conduct transactions over the Internet. However, there are still both commercial and technical problems, which will take time to be resolved. The Internet stands for international network of computers that are linked together to exchange information. The computers are joined through high-speed connections. To get on Net, all you hare to do is to connect your PC to any of these networked computers via an Internet Access Provider.

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The Net has capabilities for cheap, global and immediate communication. It may grow to dominate areas of publishing, news and education, banking and customer support.

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