星火30篇文章貫通考研詞匯25

所屬教程:星火30篇文章貫通考研詞匯

瀏覽:

手機版

掃描二維碼方便學習和分享

00:00

MP3下載文本下載

Unit 25 Internet………………………………………445

互聯(lián)網(wǎng)

互聯(lián)網(wǎng)是計算機網(wǎng)絡的國際性的集成，這些網(wǎng)絡都理解一個標準的地址命令系統(tǒng)，并經(jīng)中樞鏈路網(wǎng)絡連在一起?；ヂ?lián)網(wǎng)可以提供的服務為電子郵件、遠程登陸、文件傳送、電子新聞和實況對話等?？梢哉f，互聯(lián)網(wǎng)是你的計算機通向世界其他地方的窗口……

The Internet is a giant network of computers located all over the world that communicate with each other.

The Internet is an international collection of computer networks that all understand a standard system of addresses and commands, connected together through backbone systems. It was started in 1969, when the U. S. Department of Defence(美國國防部) established a nationwide network to connect a handful of universities and contractors. The original idea was to increase computing capacity that could be shared by users in many locations and to find out what it would take for computer networks to survive a nuclear war or other disaster by providing multiple paths between users. People on the ARPNET(阿帕網(wǎng)，因特網(wǎng)的前身) (as this nationwide network was originally called) quickly discovered that they could exchange messages and conduct electronic "conferences" with distant colleagues for purposes that had nothing to do with the military industrial complex. If somebody else had something interesting stored on their computer, it was a simple matter to obtain a copy (assuming the owner did not protect it).

Over the years, additional networks joined which added access to more and more computers.Today thousands of networks and millions of computers are connected to the Internet. It is growing so quickly that nobody can say exactly how many users "On the Net".

The Internet is the largest repository(寶庫) of information which can provide very very large network resources. The network resources can be divided into network facilities resources and network information resources. The network facilities resources provide us with the ability of remote computation and communication. The network information resources provides us with all kinds of information services, such as science, education, business, history, law, art and entertainment,etc.

The goal of your use of the Internet is exchanging messages or obtaining information. What you need to know is that you can exchange message with other computers on the Internet and use your computer as a remote terminal on distant computers. But the internal details of the link are less important, as long as it works. If you connect computers together on a network, each computer must have a unique address, which could be either a word or a number. For example, the address of Sam’s computer could be Sam, or a number.

The Internet is a huge interconnected system, but it uses just a handful of method to move data around. Until the recent explosion of public interest in the Internet, the vast majority of the computers on the Net use the Unix operating system(Unix操作系統(tǒng)，一種多用戶的操作系統(tǒng)). As a result, the standard Unix commands for certain Internet services have entered the online community’s languages as both nouns and verbs to describe the services themselves. Some of the services that the Internet can provide are: Mail(電子郵件), Remote Use of Another Computer(Telnet)(遠程登錄), File Transfer(文件傳送), News, and Live Conversation.

The most commonly used network service is electronic mail (E-mail), or simply as mail. Mail permits network users to send textual messages to each other. Computers and networks handle delivering the mail, so that communicating mail users do not have to handle details of delivery, and do not have to be present at the same time or place.

The simplest way to access a file on another host is to copy it across the network to your local host. FTP(File Transfer Protocol) can do this.

Presently, a user with an account on any Internet machine can establish a live connection to any other machine on the Net from the terminal in his own office or laboratory. It is only necessary to use the Unix command that sets up a remote terminal connection (Telnet), followed by the address of the distant machine.

Before you can use the Internet, you must choose a way to move data between the Internet and your PC. This link may be a high-speed data communication circuit, a local area network (LAN)(局域網(wǎng)), a telephone line or a radio channel. Most likely, you will use a Modem(調(diào)制解調(diào)器) attached to your telephone line to talk to the Internet. Naturally, the quality of your Internet connection and service, like many other things in life, is dictated by the amount of money that you are willing to spend,

Although all these services can well satisfy the needs of the users for information exchange, a definite requirement is needed for the users. Not only should the users know where the resources locate, but also he should know some operating commands concerned to ease the searching burden of the users, recently some convenient searching tools appear, such as Gopher(一種因特網(wǎng)的資源檢索工具), World Wide Web (WWW)(萬維網(wǎng)) and Netscape(Netscape公司的因特網(wǎng)瀏覽器).

WWW is a networked hypertext protocol (超文本協(xié)議) and user interface (用戶界面). It provides access to multiple services and documents like Gopher does but is more ambitious in its method. A jump to other Internet service can be triggered(觸發(fā)) by a mouse click on a "hot-linked(熱鏈接)" word, image, or icon on the web page.

As more and more systems join the Internet, and as more and more forms of information can be converted to digital form, the amount of stuff available to Internet users continues to grow. At some points very soon after the nationwide (and later worldwide) Internet started to grow, people began to treat the Net as a community, with its own tradition and customs. For example, somebody would ask a question in a conference, and a complete stranger would send back an answer: after the same question were repeated several time by people who hadn’t seen the original answers, somebody else gathered list of "frequently asked questions(常見問題，簡稱FAQ)" and placed it where newcomers could find it.

So we can say that the Internet is your PC’s window to the rest of the world.

注釋:

communicate→★common

handful→★hand

contractor

compute→★count/country

location

nuclear

nuclear war

multiple→★double

conference

owner→★own