A huge network connected in series between networks, which are connected by a set of common protocols, logically forming a single huge international network. The general Internet refers to the general Internet, and the Internet refers to the special Internet.

This method of connecting computer networks together can be called "network interconnection", and on this basis, the global internet covering the whole world is developed, which is called Internet, that is, the interconnected network structure.

Working principle:

A computer network consists of many computers. In order to transmit data between computers in the network, two things must be done, the destination address of data transmission and measures to ensure fast and reliable data transmission, because data is easily lost or transmitted incorrectly during transmission.

Internet uses a special computer language (protocol) to ensure that data can reach the designated destination safely and reliably. This language is divided into two parts: TCP (Transmission Control Protocol) and IP (Internet Protocol) affirming network marketing theory.

Data transmission process of TCP/IP protocol: The communication mode adopted by TCP/IP protocol is packet switching. The so-called packet switching is simply data.

It is divided into several segments during transmission, and each data segment is called a data packet. The basic transmission unit of TCP/IP protocol is data packet. TCP/IP protocol mainly includes two main protocols, namely TCP protocol and IP protocol. These two protocols can be used in combination, and can also be used in combination with other protocols. In the process of data transmission, they mainly complete the following functions:

1) Firstly, the data is divided into several data packets by TCP protocol, and the serial number is written for each data packet, so that the receiver can restore the data to its original format.

2)IP protocol writes the addresses of the sending host and the receiving host for each data packet. Once the source address and destination address are written, the packet can transmit data on the physical network. IP protocol also has the function of routing with routing algorithm.

3) These data packets can be transmitted through different transmission paths (routes). Due to different paths and other reasons, the order may be reversed, data may be lost, data may be distorted or even repeated. These problems are handled by TCP protocol, which has the function of checking and handling errors, and can also request the sender to resend when necessary. In short, IP protocol is responsible for data transmission, while TCP protocol is responsible for reliable data transmission.

Internet is widely used in real life. You can chat, play games and check things online. More importantly, advertising and shopping can also be done on the Internet. Internet has brought great convenience to real life. On the Internet, netizens can find their academic and professional needs in the digital knowledge base, thus helping them to work and study.

Internet is widely used in reality. Every day, hundreds of millions of people use it to chat, learn information, shop and so on. Some people also use the internet to promote their products, which also promotes the birth of some emerging industries, such as online marketing. The influence of the Internet is affecting our life more and more, so we will get greater changes.

Extended data

In fact, the Internet means the Internet, also known as the Internet. According to transliteration, it is also called Internet, Internet. It is a huge network, connected by a set of general protocols, forming a logically single and huge global network.

In this network, there are switches, routers and other network devices, various connection links, various servers and countless computers and terminals.

The Internet began in the United States in 1969. Under the ARPA (ARPA) protocol, the US military first used it for military connection, and then connected four main computers of UCLA, Stanford University Research Institute, UCSB (University of California) and the University of Utah in the southwestern United States.

Another WAN that promotes the development of the Internet is NSF, which was originally funded by the National Science Foundation of the United States, connecting five supercomputer centers in the United States and providing its resources to more than 65,438+000 American universities. The NSF network also adopts TCP/IP protocol and is connected to the Internet.

ARPA network and NSF network were originally used for scientific research, and their main purpose was to provide users with valuable host resources. With the increase of the number of access hosts, more and more people use the Internet as a communication tool. Some companies have also begun to conduct business activities on the Internet.

With the commercialization of the Internet, its great potential in communication, information retrieval, customer service and other aspects has been tapped, which has made a qualitative leap in the Internet and eventually went global.

reference data

Baidu Encyclopedia-Internet