Network protocols are the rules and standards that must be followed for communication between communicating entities in a computer network. The following are common network protocols:
1.TCP/IP protocol
The TCP/IP protocol is the basic protocol used by the Internet. It consists of two parts: Transmission Control Protocol (TCP) and Internet Protocol (IP). TCP is responsible for the reliable transmission of data, and IP is responsible for routing data packets from the source address to the destination address.
2.HTTP protocol
The HTTP protocol is the most commonly used protocol by web applications and is used to transfer data between web browsers and web servers. The HTTP protocol defines the format of requests and responses and specifies how to operate web resources.
3. SMTP protocol
The SMTP protocol is the basic protocol for email services and defines how emails are transmitted. The SMTP protocol is mainly used for sending emails.
4. POP3 protocol
The POP3 protocol is another protocol for email services that is used to download emails from the mail server. The POP3 protocol allows users to receive emails through email client software.
5. FTP protocol
FTP protocol is File Transfer Protocol, which is used to transfer files between two computers. The FTP protocol supports file upload and download, as well as operations such as renaming, deleting and moving files.
6.DNS protocol
The DNS protocol is the basic protocol of the Domain Name System (DNS), which is used to resolve domain names into IP addresses. The DNS protocol works by querying one or more domain name servers to find the IP address associated with a given domain name.
7.DHCP protocol
DHCP protocol is the Dynamic Host Configuration Protocol, which is used to automatically assign IP addresses and other network configuration parameters, such as subnet masks and default gateways. The DHCP protocol can help simplify network management and improve network reliability and security.
In addition to the protocols listed above, there are many other network protocols, such as SSH protocol, SSL protocol, SNMP protocol, etc. These protocols all play an important role in different fields, making computer networks more stable, reliable and secure.