Many people are surprised when they find that the Internet wasset upset offset forthin the 1960s. At that time, computers were large and expensive. Computer network didn't work well. If one computer in the networkbroke outbroke throughbroke down , then the whole network stopped. So a new network system had to be set up. It should be good enough to be used by many different computers. If part of the network was not working, information could be sent throughanotherthe otherotherpart. In this way computer network system would keep on working on the time. At first the Internet was only used by the government, but in the earlynineteen seventy1970s1970, universities,hospitals and banks were allowed to use it too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers becamemore expensivesmallercheaperand easier to use. Scientists had also developed software that made “surfing” in the Internet more convenient.
****此区域为收费内容**** 需支付 10 知识币后可查看,1币=0.01元查看答案
|