Гуру Песен Популярное
А Б В Г Д Е Ж З И К Л М Н О П Р С Т У Ф Х Ц Ч Ш Э Ю Я
# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Chapter 3 - 2 (слова "песни" присутствуют) | Текст песни

By 1972, the ARPAnet included dozens of sites. But hardly anyone knew about the network. Larry Roberts decided that this must change. He asked Bob Kahn at BBN to organize a public show. Kahn picked the International Conference on Computer Communication as the place to show the network to the world. The conference was held at the Hilton Hotel in Washington at the end of October. Larry Roberts contacted all of the people around the USA who were now using his system. Many of them agreed to take part in the show. It was a real test of the network. In one example, a computer in Washington contacted another machine right across the country at UCLA and told it to run a program. When it had finished, this program then called Washington with the results and printed them out on a printer that sat on a table right next to the first computer. There were also programs that allowed people to play games over thousands of kilometres. And a group from MIT brought a clever machine that was like a mechanical spider. This machine could be controlled over the network and guided through a room full of furniture, although its owners were many kilometres away. But not everything went smoothly. The team with the printer could not make it work, although the network said that all the data was moving between the sites just as it was supposed to. Then someone looked around and noticed that the mechanical spider was jumping about in a mad dance. The UCLA computer had been connected to the spider by mistake — the dance was the data that was intended for the printer!
However, most of the problems were small and most of the guests at the conference were amazed by the network. After this, the ARPAnet began to grow even more rapidly. But now it was not the world's only network of computers.

After the ARPAnet had shown that a computer network could be built and that it could be useful, other networks began to appear. Universities, government departments and other organizations saw that networking could multiply the power of their computers — and the power of the people who used them. But these new networks created their own rules. A system that was best for the ARPAnet did not necessarily suit other organizations with different needs, different styles of work and different hardware. So, once again, there were many different computer systems that could not talk to each other. Now, just a few years after the ARPAnet was invented, the appearance of new networks had once again created the problem that had caused Bob Taylor to imagine the world's first computer network. By this time, Bob Kahn was in charge of the ARPAnet project. He was very familiar with the new problem because he had worked on some of the newer networks. They were all designed to deal with different circumstances. For example, the Alohanet network in Hawaii used radio waves to deal with the problem of communicating over mountains and between different islands. The network in the San Francisco area was not even fixed: it was on lorries which moved around from place to place. The Atlantic Packet Satellite Network used another system, sending messages up to satellites in space to communicate across half the world. On one of his visits to San Francisco, Bob Kahn went to see Vint Cerf, who was now at Stanford:

'I need to find a way to connect these new networks,' said Kahn. 'They're not like the ARPAnet. They all use their own software and hardware. It's a mess.' 'They're not going to change over to the ARPAnet system now,' said Cerf. 'They've spent too much money. And the systems work.' 'I know, but I still need a way to join them together. It's worse than before the ARPAnet — at least then we didn't know what a network could do.' 'So what do you want to do?' Cerf asked. 'I don't know. How do we make a network of networks?' 'The IMPs were the answer for the ARPAnet.' 'But they were built to link together different computers, not different networks,' said Bob Kahn. '

Chapter 3 еще тексты


Статистика страницы на pesni.guru ▼
Просмотров сегодня: 1
Видео
Нет видео
-