Computer Networks in our System

Computer Classes in Ranchi

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Computer Networks in our System

 Computer Networks, a computer network is a collection of computers and devices like printers, scanners connected together via wires or the internet. For example the connection of a computer with a printer. The computers and devices which are part of the network exchange information or communicate with each other. 




Communication  

 Computer communication is the transfer of information from a sender, across a distance, to a receiver. A sender is a person who sends a message. A receiver is a person who gets the message sent by the sender. Communication is an act of exchanging messages.

 Computer Networks, components of a Computer Network are

To create a Computer Network, we need –

  • Two or more computers
  • Wires or the internet to link the computers.
  • Operating system

 Importance of Computer Networks 

 computer lessons, using a computer network has many benefits. They are-

  • Sharing of Hardware devices such as printers, scanner, etc.
  • Sharing of files.
  • Sharing of software.
  • Computer Networks helps in fast communication.
  • Files can be stored.

 Types of Computer Networks are:-

There are two main types of computer network. They are:

  • a local area network (LAN)
  • a wide area network (WAN)

Local Area Network (LAN)

 Computer lessons, a local area network (LAN) is when computers or devices are connected together over a small area, such as within a home, a building, etc. A LAN can be created to share files or hardware such as a printer, or to share an internet connection.





  • A local area network is low in cost.
  • It is fast in speed.
  • It is small in size.

Wide Area Network (WAN)

  Computer lessons, a wide area network is when computers or devices are connected together over a large area such as a country or the world. It is a collection of LANs. The biggest WAN is the internet.




  • A wide area network is high in cost.
  • It is slow in speed.
  • It is big in size.

Disadvantages of a Computer Network are :-

  • Loss of files in case the network stops.
  • They spread viruses.
  • Managing a large network is difficult.

Examples

Q1) ____ is a collection of computers and devices.

Ans:    Computer Network.

Q2) What is an act of exchanging messages?

Ans:   Communication.

Q3) Which type of area network is low in cost?

Ans:   Local area network.

Q4) What is a collection of LANs?

Ans:   Wide area network.

Recap

  • A computer network is a collection of computers and devices
  • Communication is the transfer of information from a sender, across a distance, to a receiver.
  • There are two main types of computer network. They are a local area network (LAN) and wide area network (WAN).
  • A local area network (LAN) is when computers or devices are connected together over a small area.
  • A wide area network is when computers or devices are connected together over a large area. 


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