Internet of the divice

Network is data communication mechanism (device).

Computer network is the process of connecting two or more than two computers to share the data and resources.

The resources can be any peripheral devices such as CD-ROM, Pen drive, Hard disk drive, Printer etc. and the data can be the folders and the files available in the share folder because a file is shared only when that file is available in the shared folder.

(a)  On the basis of Media: - On the basis of media there are two kinds of network.

(i)   Wired (Guided) Media: - On the guided media, we can establish the network physically with the help of coaxial cable twisted pair cable, NIC, RJ 45, RJ 11, Fiber Optic cable etc.

(ii)  Unwired (Unguided) Media: - This type of network is created with the help of WAP (Wireless Access Protocol). The wireless media uses USB, NIC, Infrared, Radio wave, Bluetooth, Link Sys, and Router etc.

(b)  On the basis of Scope: - On the basis of scope there are three kinds of network. This is also called the network on geographical base. They are as follows:

(i)   LAN (Local Area Network): - When the network is established in a single room, single floor, or in a single building within 500 meters of long distance then it is called LAN. In this network, we can connect maximum of 254 computers. A LAN can be both the wired and unwired.

(ii)  MAN (Metropolitan Area Network): - When two or more than two LAN(s) are connected with the help of Repeater, Router etc. then it is known as MAN.

(iii) WAN (Wide Area Network): - When the network expands country wise, within continent or world wise then it is called WAN. To establish the network of WAN, we use VSAT (Very Small Aperture Terminal) or Satellite.

(c)  On the basis of Function/Model: - On the basis of function there are two kinds of network:

(i)   Peer to Peer Network: - In this network, we use the client Operating system. We can also use the server operating system. But the services of server cannot be taken from it. In this network, all the computers are administrated or managed individually. We assume a computer as a server. This type of network is useful for small organization. It has no server so has no security.