Several network communication protocols for beginners (1)

Network communication protocols, as the name suggests, are the protocols used for communication in computer networks and the standards for various network data transmission and other work, only one effective standard model can ensure that all kinds of services and services on the Internet can be completed in an orderly manner. Next we will introduce several network communication protocols that everyone knows.

Network Communication Protocol 1, HTTP

English name: hyper text transport protocol

Chinese name: Hypertext Transfer Protocol

Function Description: it is the most widely used communication protocol for information transmission over the Internet, all WWW programs must follow this protocol standard. Its main function is to access files on a resource server, including browsing, downloading, and running specified files on the server, that is to say, we can access WWW resources on the Internet through HTTP ｡

Example of http://www.chinayancheng.net/test.html

In this example, the user wants to create a webpage named test.html, which is stored on a resource server such as www.chinayancheng.net ｡

Network Communication Protocol 2, FTP

English name: file transfer protocol

Chinese name: File Transfer Protocol

Function Description: This protocol is one of the methods for obtaining files from the Internet. It is used to transfer files between users and file servers, through this protocol, users can easily connect to the remote server, view the file content on the remote server, and copy the required content to their own computer. On the other hand, if the file server authorization allows you to manage the files on the server, you can upload the content on your local computer to the file server for sharing, in addition, you can freely edit the preceding file, such as deleting, moving, copying, and renaming the file ｡

Example of ftp://ftp.chinayancheng.net/pub/test.exe

This example indicates that the file you want to download is stored on the computer "ftp.chinayancheng.net", and the file is stored in the pubsubdirectory under the server. The content to download is test.exe ｡

Network Communication Protocol 3, FILE

English name: file

Chinese name: Local File Transfer Protocol

Function Description: This protocol is used to obtain files from a user's computer. Through this protocol, users can display files stored on their hard disks on the screen of the navigation system ｡

Example: file: // c:/yancheng/test.htm

In this example, the user wants to upload a file named test.htm on the compute server, which is stored in the yancheng directory of drive C. Note that the drive letter is followed by "|" instead of ":". In addition, because the computer is omitted, file is followed by three slash "//".

Network Communication Protocol 4, TELNET

English name: telnet

Chinese name: Remote logon Protocol

Function Description: This protocol allows you to use your computer as a terminal on a remote host. Through this protocol, you can log on to a remote server, connect to and control remote computers using commands based on the text interface, without the graphical interface function in WWW. Once a user establishes a connection with the remote server through TELNET, the user's computer is entitled to the same power as the remote computer's local terminal, and can use the server's CPU, hard disk, and other system resources as the local terminal ｡

Example: telnet: // yancheng.jsinfo.net indicates that the user intends to log on to a remote computer named yancheng.jsinfo.net and control and manage files and other resources on the remote server through his own computer ｡

Network Communication Protocol 5. MAILTO

English name: mail

Chinese name: email Protocol