What is HTTP?

The website address we enter in the address bar of the browser is called URL (uniformresourcelocator, unified Resource Locator ). Just as each household has a home address, each webpage also has an Internet address. When you enter a URL in the browser address box or click a hyperlink, the URL determines the address to be viewed. The browser uses Hypertext Transfer Protocol (HTTP)CodeExtracted and translated into beautiful web pages. Therefore, before we understand HTTP, it is necessary to clarify the URL composition, for example, http://www.microsoft.com/china/index.htm. Its meaning is as follows:

 

1. http: //: Indicates Hypertext Transfer Protocol. A web page is displayed on the Microsoft.com server, which is usually not input;

 

2. www: represents a web (World Wide Web) server;

 

3.microsoft.com/:the Domain Name of the server with web pages or the name of the site server;

 

4. China/: The subdirectory on the server, just like our folder;

 

5.index.htm: index.htm is an HTML file (webpage) in the folder ).

 

We know that the basic protocol of the Internet is the TCP/IP protocol. However, the top layer of the TCP/IP model is the application layer, which contains all high-level protocols. High-level protocols include file transfer protocol FTP, email transmission protocol SMTP, Domain Name System Service DNS, network news transmission protocol NNTP and HTTP.

 

Hypertext Transfer Protocol (Hyper Text Transfer Protocol) is a transfer protocol used to transfer hypertext from a WWW server to a local browser. It makes the browser more efficient and reduces network transmission. It not only ensures that the computer transfers hypertext documents correctly and quickly, but also determines which part of the transmitted documents and which part of the content is first displayed (such as text before graphics. This is why all the web addresses you see in your browser start with "http.

 

Since the birth of WWW, a colorful information and virtual world have appeared in front of us, but how can we find the information we need more easily? After deciding to use hypertext as the standard format for WWW documents, in 1990, scientists immediately developed a protocol to quickly search for these hypertext documents, namely HTTP. After several years of use and development, it has been continuously improved and expanded. Currently, the sixth version of HTTP/1.0 is used in www.