What is Computer Network and types of network ?

Computer Networks and  Its types:

Computer Network is a group of  Computer systems that are linked together through communication channels to facilitate communication and resource share among a wide range of users. In other word it is a set of computers connected together for the purpose of sharing resources.

There are different types of network based on size. These are:

1. Personal Area Network (PAN)2. Local Area Network (LAN)3. Metropolitan Area Network (MAN)4. Wide Area Network (WAN)

Personal Area Network (PAN) :

Personal Area Network (PAN) is a network organized around an individual person within a single building. This could be inside a small office or residence. A PAN provides data transmission among devices such as computer, smartphones, tablets and personal digital assistants.

Local Area Network (LAN) :

A local area network (LAN) is a group of Computers and associated devices that share a common communications line or wireless link to a server. Typically, it is an encompasses computers and peripherals connected to a server within a distinct geographic area such as any office of your area.

Ethernet and Wi-Fi are the two primary ways to enable LAN connections.

Metropolitan Area Network:

A Metropolitan area network (MAN) is a network that interconnects user with computer resources in a geographic area or region larger than covered by even a large Local Area network(LAN). Metropolitan Area Network are formed by connecting multiple LANs. but it is smaller than the Wide Area Network(WAN).

Wide Area Network (WAN) :

A Wide Area Network (WAN) is a geographically distributed private telecommunications network or Computer network that interconnects multiple Local Area Networks(LAN)

Definition of Internet:

The Internet can be defined as a network of globally connected computers that is decentralized by design. This definition can be broken down into three parts. Let's understand each part of the definition in isolation.

Is a network. A network is a collection of computers. The Internet can also be referred to as a network because it is a collection of millions of computers.

Globally connected computers. This means that you can be connected to the Internet, regardless of your location. The Internet has brought people in the world closer by connecting computers located in the remotest of locations.

Decentralized design. The Internet has a decentralized design. That is , there  is no centralized body that controls the way in which the Internet functions. The Internet does provide online services that are centrally administered, but as a whole, it would not be incorrect to say that the Internet has a decentralized design, Each computer connected to the Internet is called a host.

What is Internet?

Internet is a Network of Networks. It is a globally connected network that uses TCP/IP to transmit data via various types of media.The Internet sometimes called simply the Net is a worldwide system of computer networks a network of networks.