Presentation on theme: "Internet and Modern Life"— Presentation transcript:
1 Internet and Modern Life The Internet is a huge network of computers spanning this planet and is now started to bring in the surrounding area like space.
2 Historical factsThe history of Internet began in the United States in It was a military experiment, designed to help to survive during a nuclear war, when everything around might be polluted by radiation and it would be dangerous to get out for any living being to get some information to anywhere. Information sent over the Internet takes the shortest and safest path available from one computer to another. Because of this, any two computers on the net will be able to stay in touch with each other as long as there is a single route between them. This technology was called packet switching.
3 Invention of modemsInvention of modems, special devices allowing your computer to send the information through the telephone line, has opened doors to the Internet for millions of people.Most of the Internet host computers are in the United States of America. It is clear that the accurate number of users can be counted fairly approximately, nobody knows exactly how many people use the Internet today, because there are hundred of millions of users and their number is growing.
4 The Internet is very helpful The Internet is very helpful, because it's a huge database of knowledge, from the pictures of family trips to an analysis of quantum mechanics. Everyone should have the Internet because of its near instantaneous communication and huge wealth of knowledge. But how to go on the Internet and do a search for information we need. There are two ways to do it.
5 Using a search programThe first is when you know an internet address of data you need and the second one is when you try to find information you need by using a search program. In the beginning we have got to enter any browser you like. It could be an Internet Explorer, Netscape Navigator or Opera, etc. If we have a broadband connection, we connect to the Internet at once. If not, we have to set up and connect to our dial-up service. Finally, if we want to find some information in the Internet, we are to type an address of this data in the browser we use or simply use the existing search-programs such as the google search program, rambler search program, yandex search program or yahoo search program.
6 They are very simple and popular networks of sites They are very simple and popular networks of sites. In these programs we can just type the word or name of thing, we would like to find and then press enter. A search program solves this problem. We get our results in the same window. After we get our results, we simply choose whatever site best matches our query or keep searching. Besides data, one can get from the Internet, we can also send and receive or electronic mail. This internet service is cheaper than ordinary mail and much quicker. It is becoming popular day by day. We can get some news from the Internet, because there are many informational servers in the web.
7 Nowadays the most popular Internet service is . Most of the people use the network only for sending and receiving messages. They can do it either they are at home or in the internet clubs or at work. Other popular services are available on the Internet too. It is reading news, available on some dedicated news servers, telnet, FTP servers, etc.
8 Commercial usersIn many countries, the Internet could provide businessmen with a reliable, alternative to the expensive and unreliable telecommunications systems its own system of communications. Commercial users can communicate cheaply over the Internet with the rest of the world. When they send messages, they only have to pay for phone calls to their local service providers, not for international calls around the world, when you pay a good deal of money.
9 Commercial usersBut saving money is only the first step and not the last one. There is a commercial use of this network and it is drastically increasing. Now you can work through the internet, gambling and playing through the net.
10 Problems in usingHowever, there are some problems. The most important problem is security. When you send an , your message can travel through many different networks and computers. The data is constantly being directed towards its destination by special computers called routers. Because of this, it is possible to get into any of the computers along the route, intercept and even change the data being sent over the Internet. But there are many encoding programs available. Notwith-standing, these programs are not perfect and can easily be cracked.
11 Problems in usingAnother big and serious problem of the net is control. Yes, there is no effective control in the Internet, because a huge amount of information circulating through the net. It is like a tremendous library and market together. In the future, the situation might change, but now we have what we have. It could be expressed in two words— an anarchist's dream.
12 Daily and essential necessity The Internet was created in Since that time it has grown beyond its largely academic origin into an increasingly commercial and popular medium. The Internet connects many computer networks. The Internet has connected millions of computers throughout the world. We can not imagine our life without it. Our Information Age is determined in many respects by the internet. Nowadays it has become daily and essential necessity with contemporary men.