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A network (Computer Networks) is a telecommunication network that allows computers to switch data. Physical connection is customary between computers either by cable or wireless infrastructure.


  • The purpose of a network is to enable the sharing of files and information between multiple systems.
  • A network is a series of nodes interconnected with communication device to facilitate interconnection between computers.
  • Computer networks can be linked through cables, such as Ethernet cables or phone lines, or wirelessly, using wireless networking cards that send and receive data through the air.
  • There are various different kind of topologies and they are likely Bus, Star, Token ring and Mesh.
  • Network also enables the user to share resources such as Printers, Plotters, etc.,


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LAN Architecture

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Since network is used for interconnection of systems to share resources, it has various features and they are,

  • Resource sharing.
  • Increased storage capacity.
  • Increased cost efficiency.
  • Time consuming.
  • Security.
  • Centralized management.
  • Less Expensive.
  • Convenient for user monitoring.
  • Interaction between users.

Hardware Components

  • Network Interfaces.
  • Repeaters and Hubs.
  • Bridges.
  • Switches and Routers.
  • Firewalls.

Real Time Examples

There is a pool of real-time applications of the networks

  • LAN connections in Offices, Colleges, Schools.
  • Internet connection across the world.
  • Communication through internet (Emails).
  • Resource sharing .
  • Streaming video and audio via internet.
  • Sharing files and information.