The World Wide Web is a way to organize all the information on the Internet. It is a collection of hypertext documents, including any local information you want. It links from one document to another so that you can cross the Internet.

Com means business.

Org means to organize the government.

Net is a network service company that provides services for individuals or enterprises.

Edu stands for education.

2. What is the home page? When you enter a web page of a website, the first thing you see is a hypertext document.

Why is the World Wide Web so attractive?

1) First of all, the Web is based on hypertext documents and is built by linking hypertext pages.

2)Web provides user interfaces for different types of services, such as FTP and Gopher. As long as you know how to use a web browser, you will know how to use all the tools on the Internet. There are only two ways to operate a website: following links and performing searches.

3) Eliminate the barrier between private data and "public data". (resource sharing)

The development history of the World Wide Web

The World Wide Web was originally developed at CERN in Switzerland. It means providing CERN physicists with a tool to share information about their work and use groups. Before the advent of the World Wide Web, there were many hypertext systems executing programs.

Berners-Lee cooperated with others at CERN to develop an Internet-based architecture, which is an open public standard with a free sample execution program. Because it is public, you can build a Web client or a Web server. Because it is free, some developers can choose to compile or define every part of the system. It is because of these two factors that others can join this project. The development of the World Wide Web enables people all over the world to work together.

Second, some important terms.

1. What is hypertext? Hypertext files are data links with other data. Documents that contain links to other documents; Automatically display the second document when you select the link. A simple example of a hypertext document is an encyclopedia. Suppose you are reading the word "tree", and there is a reference at the end of the article that says "See' Plants' for relevant information". This last line is an association, from "tree" to "plant". Of course, this is just a simple example. The World Wide Web is based on a much more complicated hypertext document. In particular, there may be associations anywhere in the file, not just at the end. Give an imaginary example. Suppose you are reading a hypertext document of a tree on the World Wide Web. Every time a new tree is mentioned, there will be an association, and each association will be recognized in some way to stand out. For example, related words may be highlighted or underlined, or marked with numbers. If you follow the association, you will walk to the entrance of that type of tree. There are other topics in the main item, such as "rainforest" or "wood" These associations lead to complete entries. You can also find links with technical terms, such as "deciduous family" and "coniferous tree". If you follow these associations, you will find their definitions. In the language of the World Wide Web, hypertext documents consist of some data, which may be related to other documents.

2. What is Hypertext Transfer Protocol (Http)? It is an Internet standard that supports information exchange on WWW and defines how the Web server responds to file requests.

3. What is Hypertext Markup Language? A language used in WWW to specify the content and format of hypermedia text. The file extension of hypertext is usually. Html, and the parser accessing these files is a Web browser.

4. In order to use the network, you need a network client program. This program can interpret and display hypertext files, and it knows how to find and display files pointed by links. The first WWW browser was a text line browser, which was completed by a team at CERN. The browser Mosaic developed by the National Supercomputer Application Center (NCSA) of the University of Illinois was developed by Mark Anderson and Eric Bila. Its appearance has greatly promoted the development of the network. The first version of Mosaic was developed on X Windows under UNIX system. With the increase of Internet users, NCSA has expanded the development achievements of Mosaic and developed browsers based on Microsoft Windows and Macintosh versions. NCSA also allows Mosaic source code to be distributed to commercial software developers. Therefore, many commercial WWW browsers evolved from Mosaic, including Microsoft's Internet Explorer.

1994, jim clark and mark anderson founded Netscape. This paper introduces the Netscape Navigator browser, which can be downloaded for free on the Internet. The latest version can be downloaded from Netscape's homepage.

Seeing the huge development prospect of the Internet, Microsoft also studied its own browser Internet Explorer in the summer of 1996, and competed with Netscape Navigator of Netscape for the world.

Browsers can be divided into two types: character-based interface and graphical interface.

5. Uniform Resource Locator (URL): A short string used to identify a specific information page, which is a method of accessing Internet resources. URL is mainly used for various WWW client programs and service programs. When a user selects a resource, the client/server program automatically looks up the server address where the resource is located, and once it is found, it calls out the resource for the user to browse. It can accurately explain the address and type of the file.