Internet network interconnection of the basic protocols used by the TCP/IP

TCP/IP (Transmission Control Protocol/InterNet Protocol) is a network communications protocol, which regulates the format and transmission method of data traffic between all the communication devices on the network, especially between one host and another. TCP/IP (Transmission Control Protocol/InterNetwork Protocol) is a network communication protocol that regulates the format of all communication devices on a network, in particular the format of data exchanges between one host and another, as well as the way in which it is transmitted. In data transmission, can be visualized as having two envelopes, TCP and IP are like envelopes, the information to be transmitted is divided into a number of segments, each segment is stuffed into a TCP envelope, and on the face of the envelope to record the segment number of information, and then the TCP envelope is stuffed into a large IP envelope, sent to the Internet. On the receiving end, a TCP package collects the envelopes, pulls out the data, restores them in the order in which they were sent, and checks them, and if an error is found, TCP will ask for a resend. As a result, TCP/IP can transmit data almost error-free in the INTERNET. In any physical network, each site has a machine-recognizable address, which is called a physical address. Physical addresses have two

characteristics:

(1) The length, format, etc. of the physical address is part of the physical network technology, the physical network is different, the physical address is also different.

(2) Sites on different networks of the same type may have the same physical address.

The above two points determine that physical networks cannot be used for inter-network communication.

In networking terminology, a protocol is a pre-specified standard for exchanging data between two computers.TCP/IP is not one but many protocols, which is why you often hear it represented as a set of protocols, of which TCP and IP are just two basic ones.