4 October 2016

What is Network/Networking? (Part 2)

A network is a group of computers or computer like devices connected together to share the resources like file, printer, services etc. A typical network contains users working in workstations (also known as a client), running client operating systems like Windows XP and store their files on a central server.

The server computer has more resources like memory, disk space and more processing power compared to client computers. The server machine has also an Operating System, which has more processing capabilities compared with the client machine.

The server may be installed with special software, which is helping it to function as a server. The special software allows file and print services, serve web pages, transfer emails etc.


  •       Local Area Network (LAN) is a network, which is limited to a small office, single building multiple buildings, college campus etc.
  •        A Wide Area Network (WAN) span over multiple geographic locations, which is composed of multiple LANs.
  •        A Metropolitan Area Network (MAN) refers to a network, which is located in a city metropolitan area. If an organization has multiple offices in a city, the term that refers the network is called MAN.

Internet, Intranet, Extranet

Internet. The Internet is a worldwide, publicly accessible network of interconnected computer networks that transmit data using the standard Internet Protocol (IP). The terms World Wide Web (WWW) and Internet are not the same.

The Internet is a collection of interconnected computer networks, linked by copper wires, fiber-optic cables, wireless connections, etc. Web is a collection of interconnected documents and other resources, linked by hyperlinks and URLs. The World Wide Web is one of the services accessible via the Internet, along with various others including email, file sharing, online gaming etc.

Intranet. An intranet is a private network that is contained within an enterprise. It may consist of many interlinked local area networks and also use leased lines in the wide area network. The main purpose of an intranet is to share company information and computing resources among employees.

Extranet. An extranet can be viewed as part of a company's intranet that is extended to users outside the company like suppliers, vendors, partners, customers, or other businesses.

Why we need computer networks?

Computer networks help users on the network to share the resources and in communication. Can you imagine a world now without emails, online newspapers, blogs, chat and the other services offered by the internet?
The following are the important benefits of a computer network.

  •      File sharing: Networking of computers helps the users to share data files.
  •       Hardware sharing: Users can share devices such as printers, scanners, CD-ROM drives, hard drives etc.
  •       Application sharing: Applications can be shared over the network, and this allows to implement client/server applications
  •       User communication: Networks allow users to communicate using e-mail, newsgroups, and video conferencing etc.
  •      Network gaming: A lot of network games are available, which allow multi-users to play from different locations.
Thanks for reading!!!

          Read More: What is Networking/Network? (Part 1)

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