What is called intranet, extranet, and public network

1. Intranet: also known as local area network (LAN), is a computer communication network composed of various computers, external equipment and databases connected to each other within a local geographical range (such as a school, factory and institution) within a radius of several kilometers.

2. Public network: The public network is relative to the internal network. The IP address obtained by the computer on the intranet is the reserved address on the Internet; The IP address obtained by a computer on the Internet is the public address of the Internet, and it is a non-reserved address.

Computers on the public network and other computers on the Internet can access each other at will.

3. Extranet: Wide Area Network (English: Wide Area Network, abbreviated as WAN), also known as Wide Area Network and Extranet.

It is a remote network that connects computer communication in different regions, either a local area network or a metropolitan area network. It is usually spanning a large physical range, covering a range of tens to thousands of kilometers, and it can connect multiple regions, cities and countries, or across several continents and provide long-distance communication to form an international long-range network.

Definition of intranet: Intranet refers to a local area network, which refers to a group of computers interconnected by multiple computers in a certain area.

Intranet enables functions such as file management, application software sharing, printer sharing, scheduling within workgroups, e-mail and fax communication services, and more.

The public network is the ordinary circuit switching network, that is, the backbone and branch network set up by Netcom, telecommunications, and Tietong.

Definition of Extranet: Ineternet basic network, commonly known as extranet. The public network is the Internet (Internet), which is a collection of computer networks (including local area networks, metropolitan area networks, and wide area networks) that connect computer networks of different locations and scales around the world.

Domestic visits to international nature are prohibited**.

Intranet and extranet are actually not written terms, just a popular saying, than the method of a company's LAN can be called intranet, and the Internet is the external network;

The rest is the public address. In fact, the public network we are talking about is the external network, and the private network is the internal network, which can be understood in this way.

Intranet and public network are two types of Internet access, and public network and extranet are basically the same concept.

A computer on the intranet can send a connection request to other computers on the Internet, but other computers on the Internet cannot send a connection request to a computer on the intranet.

Computers on the public network and other computers on the Internet can access each other at will.

Check the IP address of the machine, if the IP address of the machine is a reserved address on the Internet, then your machine is in the internal network access mode, otherwise it is the external network access mode. Generally speaking, those who use ADSL virtual dial-up Internet access generally have public network IP, and those who share Internet access, such as Internet cafes, offices and other environments, are connected through intranets, and the specific detection methods:

Click "Start", "Run", enter ipconfig in the open box, and press enter to check your IP address in the open window.

There is also an explanation of the Internet, that is, the ** of other countries.

Yes, oh, that's what I do, oh, Android ioswin computers support it, look at my name.