Summary of common computer network protocols

Network is a tool that everyone can't do without. It is becoming more and more active. How much do you know about these computer network protocols? Understanding the use of these protocols can help us use computer networks more rationally. Now, we will introduce several commonly used computer network protocols for literacy.

Computer Network 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 ｡

Computer Network 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 ｡

Computer network 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 "//".

Computer Network 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 ｡

Computer Network Protocol 5, MAILTO

English name: mail

Chinese name: email Protocol

Function Description: This protocol is used to mail emails over the Internet. With mailto, we can create a hyperlink pointing to the email address ｡

Example: mailto: zys666@21cn.com

This example indicates that you are going to send an email to user zys666. the user's email address is set on the computer 21cn.com. by email, you can send text to the recipient, you can also send images, sounds, animations, and other multimedia files to users ｡

Computer Network Protocol 6, NEWS

English name: news group

Chinese name: Network newsgroup protocol

Function Description: This protocol allows you to access thousands of newsgroups over the Internet. You can read or write to these newsgroups, all kinds of information are stored in the computer called "USENET" news server ｡

Example: news: rec. food. restautants

In this example, the user wants to get something from the USENET newsgroup and read something about the name "rec. food. restautants is used in recipes discussion groups. The topics discussed by online news groups are all-encompassing, from political, economic, scientific, cultural, cultural, social, and other aspects, you can easily find a news group that matches your interests and hobbies, and express your views on it ｡

Computer Network Protocol 7, WAIS

English name: wide area information servers

Chinese name: Wide Area Information Server Protocol

Function Description: This protocol is a deep Method for searching information on the Internet. It provides a hyperlink related to the wide-area Information Server database and opens the hyperlink, you can query or obtain information from any database on the Internet ｡

Example: wais: // cheops.anu.edu. au

In this example, you are going. when you enter the preceding address in the address bar of your browser, wais will use a WEB page to ask you what information to query, after you enter keywords on the web page of your browser, you can perform a full search on the text. The searched files can be directly copied to the local computer ｡

Computer Network Protocol 8, GOPHER

English name: gopher

Chinese name: an Information Query System Protocol

Function Description: This Protocol defines an Information Query System on the Internet. The system is similar to the WWW menu system, except that it is in plain text mode, you can use the above menu to search for the relevant network information. In addition, you can easily transfer the information from one gopher server to another gopher server for retrieval and copying ｡

Example: gopher: // showme.missouri.edu/aroundcolumbia

In this example, you want to query the content in the aroundcolumbia directory on a server named "showme.missouri.edu". If the above address is followed by a specific file name, the text file is returned to the user from the server; if there is no file name, the menu is returned to the user from the server ｡