[布衣随笔今天如何当老师]看了苏州布衣的今天如何当老师,再看学校淼转贴的关于 谁在搞垮教育 ,于是提笔 牢骚两句:首先:教师是一个职业么?在360行里面么? 最卑鄙的回答:不!你们担负着教书育人的重任!!学生的成...+阅读
How the Web Works
The World Wide Web, the graphical portion of the Inter, is the most popular part of the Inter by far. Once you spend time on the Web,you will begin to feel like there is no limit to what you can discover. The Web allows rich and diverse(1) munication by displaying text, graphics, animation(2), photos, sound and video.
So just what is this miraculous(3) creation? The Web physically consists of your personal puter, web browser software, a connection to an Inter service provider, puters called servers that host digital data and routers and switches to direct the flow of information.
The Web is known as a client-server(4) system. Your puter is the client; the remote puters that store electronic files are the servers. Here's how it works:
Let's say you want to pay a visit to the the Louvre museum website. First you enter the address or URL(5) of the website in your web browser (more about this shortly)。 Then your browser requests the web page from the web server that hosts the Louvre's site. The Louvre's server sends the data over the Inter to your puter. Your web browser interprets the data, displaying it on your puter screen.
The Louvre's website also has links to the sites of other museums, such as the Vatican Museum. When you click your mouse on a link, you access the web server for the Vatican Museum.
The "glue" that holds the Web together is called hypertext and hyperlinks(6)。 This feature allow electronic files on the Web to be linked so you can easily jump between them. On the Web, you nigate through pages of information based on what interests you at that particular moment, monly known as browsing or surfing(7) the .
To access the Web you need web browser software, such as scape Nigator or Microsoft Inter Explorer. How does your web browser distinguish between web pages and other files on the Inter? Web pages are written in a puter language called Hypertext Markup Language or HTML.
Some Web History
The World Wide Web () was originally developed in 1990 at CERN, the European Laboratory for Particle Physics. It is now managed by The World Wide Web Consortium, also known as the World Wide Web Initiative.
The Consortium is funded by a large number of corporate members, including AT&T, Adobe Systems, Inc., Microsoft Corporation and Sun Microsystems, Inc. Its purpose is to promote the growth of the Web by developing technical specifications and reference software that will be freely ailable to everyone. The Consortium is run by MIT with INRIA (The French National Institute for Research in puter Science) acting as European host, in collaboration with CERN.
The National Center for Superputing Applications (NCSA) at the University of Illinois at Urbana-Champaign, was instrumental in the development of early graphical software utilizing the World Wide Web features created by CERN. NCSA focuses on improving the productivity of researchers by providing software for scientific modeling, analysis, and visualization. The World Wide Web was an obvious way to fulfill that mission. NCSA Mosaic, one of the earliest web browsers, was distributed free to the public. It led directly to the phenomenal growth of the World Wide Web.
注释:
diverse:adj. 不同的, 变化多的
animation:动画
miraculous: adj. 奇迹的, 不可思议的
client-server:客户端,客户机
URL:Uniform Resource Locator ,在Inter的服务程序上用于指定信息位置的表示方法。
hypertext:超文本
(一系列逻辑上互相联结的数据库,一个数据库内的信息和另一个数据库内的信息能够在逻辑上交叉链接)
hyperlinks:超链接
surf: n. 海浪, 拍岸浪;vi. 作冲浪运动;vt. 在激浪上驾(船), 在……冲浪。此处的含义指上网冲浪
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