计算机专业英语章节6节.pptVIP

Computer Networks What Can I Do ?? Background: Richard and Johnson are cousins. Now they are in the same university, both major in computer science. Johnson is a freshman, junior to Richard. One day, Richard meets Johnson. Now let’s hear what they are talking about. RICHARD: Hi, Johnson, how is everything going? JOHNSON: Hi, Richard, I’ve just adjusted to the college life. RICHARD: But you look a little worried. What’s up? JOHNSON: I have some problems with my paper that the teacher assigned last week. I have to hand it in next Friday. There’re only a few days to go but I don’t know how to start it yet. Can you lend me a hand? RICHARD: Sure. What paper? JOHNSON: A paper about the influence and the functions of the Internet. You know, in high school, I was just busy with study and have no time to access the Internet. I even know nothing about it. RICHARD: I got it. Take it easy. It’s very easy to write the paper. It’s absolutely necessary for you freshmen majoring in computer science to know the influence and the functions of the Internet. Nowadays, many people take advantage of the Internet to get the information they want. In my opinion, I would recommend that in the first place, you learn to surf the Internet. JOHNSON: But how? RICHARD: In fact, you just key in a web site containing a search engine where you key in the key words related to the information you want. Then, the web pages will show you the result of browsing. JOHNSON: It sounds so wonderful. I see. You are so helpful. Thank you! I really can’t wait to try. Contents 6.1 Introduction to Network Types of network What is network? Please briefly list the main types of networks based on the scale. What is Internet? Types of network A computer network connects computers together. Through the network, users can share hardware,