Protocol is a rule, standard or agreement established for data exchange in the network. Used for communication between entities in different systems. In order for two entities to communicate, they must have the “same language”, and there must be certain regulations for the content of communication, how and when to communicate, and these regulations are agreements. It can also be simply defined as: a set of rules that control the data exchange between two entities. In the electronic communication connection, each different level has its own agreement. For example, data exchanges at the hardware device level and application level have their own protocols. In the open system interconnection (OSI) standard mode, each layer has one or two protocols, and the two terminals that communicate must be able to recognize and comply with the protocol. Protocols are usually described in the form of industrial or international standards.
Chinese name protocol (network data exchange rules) foreign name Protocol type rules are used to describe the communication between entities in different systems to describe the form of industrial or international standards
Components
On the Internet, the general TCP/IP protocol, It consists of the following parts: 1. Transmission Control Protocol (TCP), which uses a set of rules to exchange information at the packet level with other Internet nodes. 2. Internet Protocol (IP), which uses a set of rules to send and receive messages at the Internet address level.
Other protocols
Also includes Hypertext Transfer Protocol (HTTP) and file transfer Protocol (FTP), Border Gateway Protocol (BGP) and Dynamic Host Configuration Protocol (DHCP), Simple Mail Transfer Protocol (SMTP), Post Office Protocol (POP3), Network Protocol (TCP/IP), User Datagram Protocol (UDP)