Magic World Wide Web

World Wide Web web, web for short. It is a large-scale online storage of information. The Web connection method can easily access another site from one site on the Internet.

Hypertext is the foundation of the world wide web, and hypermedia is the expansion of hypertext. The difference between the two lies in the different content of documents. hypertext documents only contain text information. hypermedia documents also contain information about other expressions, such as graphics, images, animations, and even active video images.

The World Wide Web works as a client-server. The browser is the Web Client program on the user host. The host where the World Wide Web Document resides runs in the server program, which is called the World Wide Web server. The client sends a request to the server, and the server program sends the requested World Wide Web document back to the client. The World Wide Web document displayed on the main window of a client program is called a page.

How can we mark documents distributed on the World Wide Web? How does one implement various links on the World Wide Web? How can I create World Wide Web documents of different styles? How do users know where there is a link?

It solves this problem:

1. The World Wide Web identifies various documents on the World Wide Web by agreeing to the URL (Uniform Resource Locator). No document has a unique identifier URL throughout the internet.

2. The client program (browser) and server strictly follow the hypertext transfer protocol HTTP (Hypertext Transfer Protocol ). HTTP is an application layer protocol that uses TCP connections for reliable transmission.

3. html (Hypertext Markup Language) is used to create World Wide Web documents with different styles.

4. The designer uses the link to link somewhere on this page to any 10 thousand Tib page on the Internet, so that the display of these pages can be seen on his host screen.

　　

(1) unified resource Positioning

<Protocol>: //

Protocol: HTTP and FTP (Text Transfer Protocol)

HOST: The domain name of the host over the Internet.

The port and path can be omitted sometimes.

 

Common URL http: //

The default port of HTTP is 80, which can be omitted. If the path is omitted, the URL only needs a home page on the Internet.

 

(2)

　　

Magic World Wide Web