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This article mainly explains "what are the knowledge points of TCP/IP protocol and email". The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn what are the knowledge points of TCP/IP protocol and email.

TCP/IP is a communication protocol for the Internet (Internet). TCP/IP is a communication protocol for computers connected to the Internet to communicate. TCP/IP refers to Transmission Control Protocol / Internet Protocol (Transmission Control Protocol / Internet Protocol). TCP/IP defines standards for how electronic devices, such as computers, connect to the Internet and how data is transferred between them.

Protocol family

TCP/IP is a large collection of different communication protocols based on the two original protocols TCP and IP.

TCP-Transmission Control Protocol

TCP is used to control data transfer from the application to the network.

TCP is responsible for splitting the data into IP packets before they are transmitted, and then reassembling them when they arrive.

IP-Internet Protocol (Internet Protocol)

IP is responsible for communication between computers.

IP is responsible for sending and receiving packets over the Internet.

HTTP-Hypertext transfer Protocol (Hyper Text Transfer Protocol)

HTTP is responsible for the communication between the web server and the web browser.

HTTP is used to send requests from the web client (browser) to the web server and to return content (web pages) from the web server to the web client.

HTTPS-secure HTTP (HTTP Secure)

HTTPS is responsible for secure communication between the web server and the web browser.

As a typical application, HTTPS will be used to process credit card transactions and other sensitive data.

SSL-secure Sockets layer (Secure Sockets Layer)

The SSL protocol is used to encrypt data for secure data transmission.

SMTP-simple Mail transfer Protocol (Simple Mail Transfer Protocol)

SMTP is used for e-mail transmission.

MIME-Multipurpose Internet Mail extension (Multi-purpose Internet Mail Extensions)

The MIME protocol enables SMTP to transfer multimedia files, including sound, video, and binary data, over the TCP/IP network.

IMAP-Internet message access Protocol (Internet Message Access Protocol)

IMAP is used to store and retrieve e-mail messages.

POP-Post Office Protocol (Post Office Protocol)

POP is used to download email from an email server to a personal computer.

FTP-File transfer Protocol (File Transfer Protocol)

FTP is responsible for file transfer between computers.

NTP-Network time Protocol (Network Time Protocol)

NTP is used to synchronize time (clocks) between computers.

DHCP-dynamic Host configuration Protocol (Dynamic Host Configuration Protocol)

DHCP is used to assign dynamic IP addresses to computers in the network.

SNMP-simple Network Management Protocol (Simple Network Management Protocol)

SNMP is used to manage computer networks.

LDAP-lightweight Directory access Protocol (Lightweight Directory Access Protocol)

LDAP is used to gather information about users and e-mail addresses from the Internet.

ICMP-Internet message Control Protocol (Internet Control Message Protocol)

ICMP is responsible for error handling in the network.

ARP-address Resolution Protocol (Address Resolution Protocol)

ARP-the hardware address used to find computer network cards based on IP addresses through IP.

RARP-reverse address Translation Protocol (Reverse Address Resolution Protocol)

RARP is used to find the IP address of a computer network card based on hardware address through IP.

BOOTP-Bootstrap Protocol (Boot Protocol)

BOOTP is used to start the computer from the network.

PPTP-Point-to-Point tunneling Protocol (Point to Point Tunneling Protocol)

PPTP is used for connections (tunnels) between private networks.

Mail

When you write an email, you don't use TCP/IP.

When you write an email, you use an e-mail program, such as Notes from Lotus, Outlook from Microsoft, or Netscape Communicator.

SMTP-simple Mail transfer Protocol

The SMTP protocol is used to transmit e-mail. SMTP is responsible for sending mail to another computer.

Typically, mail is sent to one mail server (SMTP server), then to another (or several) servers, and eventually to its destination.

SMTP can also transfer plain text, but not binary data such as pictures, sounds, or movies.

SMTP uses the MIME protocol to send binary data over the TCP/IP network. The MIME protocol converts binary data to plain text.

POP-Post Office Protocol

The POP protocol is used by mail programs to retrieve messages from the mail server.

If your mail program uses POP, once it connects to the mail server, all your messages will be downloaded to the mail program (or mail client).

IMAP-Internet message access Protocol

Like POP, the IMAP protocol is also used by mail programs.

The main difference between the IMAP protocol and the POP protocol is that if IMAP is connected to the mail server, it will not automatically download messages to the mail program.

IMAP gives you the ability to view messages from the mail server before downloading them. With IMAP, you can choose to download these messages or just delete them. For example, if you need to access the mail server from different locations, but just want to download the mail when you get back to the office, IMAP can be useful in this case.

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