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This article will explain to you in detail about whether e-mail is the most widely used service item of internet in the computer network. I think it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

Yes, email is the most widely used service item in internet, and the usual transport protocol is "SMTP". The SMTP protocol, which belongs to the TCP/IP protocol family, helps each computer find its next destination when sending or transferring a letter.

E-mail is the most widely used service item in internet, and the usual transport protocol is "SMTP".

SMTP is a protocol that provides reliable and efficient e-mail delivery. SMTP is a mail service based on FTP file transfer service, which is mainly used for the transmission of mail information between systems and provides notification about letters. SMTP is independent of a specific transmission subsystem and only needs reliable and orderly data flow channel support. One of the important features of SMTP is that it can transmit mail across the network, that is, "SMTP mail relay". Using SMTP, mail transmission between the same network processing process can be realized, and mail transmission between a processing process and other networks can also be realized through a repeater or gateway.

The working process of SMTP protocol can be divided into the following three processes:

(1) establish a connection: at this stage, the SMTP client requests to establish an TCP connection to port 25 of the server. Once the connection is established, the SMTP server and the customer begin to advertise each other's domain names and confirm each other's domain names.

(2) Mail transmission: using the command, the SMTP client transmits the source address, destination address and specific content of the mail to the SMTP server, and the SMTP server responds and receives the mail accordingly.

(3) connection release: the SMTP client issues an exit command, the server responds after processing the command, and then closes the TCP connection.

This is the end of the article on "is e-mail the most widely used service item in internet in the computer network?". I hope the above content can be helpful to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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