Physics and Technology – Technology – The World Wide Web
The idea of the World Wide Web revolutionized the Internet, turning it into an information center for all. In contrast to newspapers, radio, and television, users everywhere can contribute to its content and development.
The World Wide Web, or simply the Web, is a much-prized use of the Internet. Internet users can navigate through the jungle of information with the help of a Web browser. This application calls up documents stored on Web servers over the Internet and then displays these documents as Web pages.
Web pages can include text, photos, graphics, music, and videos. Hyper-links, or links, are among the most important elements of a Web page. They point to other Web pages. When the user clicks on a link, the browser loads the corresponding document.
Structure of a Web page
The document used to create a Web page includes the page’s content and also describes how the information should be structured and displayed. This structure is described with hypertext markup language (HTML). The browser interprets this language to display the information as intended. It is not difficult to learn how to design simple Web pages.
Browsers find documents on the Internet using the uniform resource locator (URL). For instance: http://www.example.com/many/examples/example 1.html indicates that the Web page example1.html can be found in the directory /many/examples/.
The Web server for this page has the domain name www.example.com. The page is requested by the browser according to a particular protocol and transmitted by the Web server using hypertext transfer protocol, HTTP. The URL can be typed directly into the browser, or it may be embedded in a document as a link.
Information searches on the Web
Information on the Web can be found with the help of search engines and Web directories. When the user enters search terms, search engines list pages containing those terms. To do this, search engines review Web pages using special computer programs (called Web crawlers, spiders, or robots) to identify search terms and create a database.
Web directories are collections of URLs, which are assembled and managed by people. They cover only limited subject areas, but are able to offer accurate descriptions of the Web pages they list.
THE FIRST WEB SITE
The revolution began at the European nuclear research center CERN in Geneva In 1989. physicist Tim Berners-Lee suggested a new method for navigating through a sea of documents.
A user-friendly information network would be constructed for the CERN scientists. Systems engineer Robert Cailliau helped implement the idea. The team developed a server, a browser, and hypertext to display documents. Today, the Internet is a global mass medium.
BASICS
The internet began in 1969 with four networked computer By 1991 there were 375.000.
Today it exceeds 400 million. The World Wide Wet) can be abbreviated to Web. WWW. or W3.