Computer networking, more commonly known as datacom or data communication is the practice of linking two or more computer systems together to exchange data. Computer networking is considered a branch of computer science, IT, telecommunications and/or computer engineering since it heavily depends on the theory and practical application of these mentioned fields.

There are three types of computer networks namely the internet, intranet and then the extranet.

- The Internet - is a global system of networks of computers that are interconnected. These networks use Internet Protocol Suite which is either TCP or IP, which serves billions of computer users around the world.

- The Intranet - unlike the internet, the intranet is a private computer network. Although the intranet makes use of Internet Protocol technologies, the information is secured within the organization and not shared to the whole world.

- The Extranet - on the other hand is actually an extension of a company's intranet. Its primary purpose is to allow users from outside the company like vendors, partners, and suppliers to gain access to certain information and data.

Here are some of the many ways of networking computers:

- Local Area Network - or usually abbreviated as LAN, is a small network of computers in a small area. One example of LAN is a network of computers in a building.

- Metropolitan Area Network - or MAN is just like LAN. The only difference is that MAN is used in a larger scale like cities or states.

- Wide Area Network - or WAN is a much larger network compared to MAN and is used to cover larger geographic areas.

- Wireless LANs and WANs - are just like WAN and LAN and the only difference is the fact that they are wireless.

In computer networking, there are lots of ways to interconnect computers like the use of coaxial cables, optical fibers, and even through power lines. But as technology improvements there are newer ways to do this such as wireless technology which include Bluetooth or Wi-Fi.

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