Computer Network:

A network consists of two or more computers that are linked in order to share resources,exchange files or allow electronic communications.

Based on Medium:

Computer network could be of two types

  1. Wired Network
  2. Wireless Network

Network Types Based on Medium:

Wired Network:

use cables, Although two computers can be directly wired to each other using a cable, wired networks generally also require central devices like hub.

Wireless Network:

WLAN technologies all follow wireless communication without physical medium without cables.

Network Types Based on Architecture:

1-Computer networks may be classified according to the functional relationships which exist among the elements of the network.

There are two configurations of computer networks

1-Client / Server architecture

2-Peer to Peer architecture

Client / Server Architecture:

1-Files are stored on a centralized , high speed file server PC that is made available to client PC’s.

2-Client’s primary applications and files are stored in a common location.

Peer to Peer Architecture:

1-Allows two or more PC’s to pool there resources together.

2-Individual resources like disk drives,CD-ROM drives, and even printers are transformed into shared collective resources that are accessible from every PC.

3-Each computer in such a network is part server and part client.

4-It means each part on the network is free to share its own resources.

Network Types Based on Area:

1-Personal Area Network (PAN)

2-Local Area Network (LAN)

3-Campus Area Network (CAN)

4-Metropolitan Area Network (MAN)

5-Wide Area Network (WAN)

6-Storage Area Network (SAN)


This is a type of network used to connect computer devices which are close to one person.

Examples: Printers , fax machines , telephones , scanners etc


  • This is type of network used to cover a small physical area like a home, a school, a small group of buildings



  • It is a computer network made by the combination of LAN within specific area.
  • ¬†It is larger than LAN but smaller than WAN.
  • Example: University campus


  • It is a network that connects two or more CAN together but does not extend the boundaries of the city.
  • Example:Connecting all the franchises of a mobile company connecting all the headquarters.



  • It is a network which covers a broad geographical area.
  • It’s communication links extends over the boundaries of cities regions and countries.
  • Example:Internet


A storage area network is an architecture to attach storage devices to servers in such a way that the devices appear as locally to the operating system.


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