What is Network?


A network can be defined as a system for connecting computers or other electronic devices using a single transmission method/technology. The computers can communicate with each other in a network and can send and receive data from each other.

Network

CLASSIFICATION OF NETWORKS

Computer networks can be classified by its:

  •  SIZE
  • CONNECTIVITY
  • MEDIUM
  •  MOBILITY

Size Aspect

According to size of network, there are two main types:

  •  Local Area Network (LAN)
  • Wide Area Network (WAN)

Connectivity Aspect

According to connectivity, networks can be divided in two topologies:

Point-to-Point

 Point-to-Point topology refers to a communication connection between two nodes or endpoints.  Start and Tree topologies are subtypes of point to point topology.

Broadcast

Broadcasting refers to a method of transferring a message to all recipients simultaneously. Satellite/Radio and Ring topology are examples of broadcast topology.

Medium Aspect

The network classification can also be done on the basis of medium of transmission:

  •  Copper wire
  • Co-axial cable
  • Optical fiber
  • Radio waves

 Mobility Aspect

There are two types of network on the basis mobility aspect:

  • Fixed networks
  • Mobile networks

ADVANTAGE OF NETWORKS IN OUR DAILY LIFE

Networks are used for resource sharing, advertising, production, shipping, planning, billing and accounting purposes.

Networks are very useful at government level as federal government, local government and military organization uses networks for communication purposes.

In education we have online libraries which we can visit at our home PC. This is all just due to the networks.

In addition to this networks are being used in homes as well for example, to switch and control different devices from one place.

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