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Computer Networks

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Objective

On the completion of this period you would be able to know

Meaning of Computer Network

Kinds of computer Networks

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Introduction to Network

Initially all computers and other information processing devices were stand alone only

Their information was available only to those who had direct connection to them

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Computer Network

Interconnection of a group of computer systems and its related devices

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Fig 136.1 A Simple Network Example

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Fig 136.2 Computer Network of Different resources

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Computer Network needs

To share resources. (files,printers,modem,fax machines)

To Share application Software (Ms office)

Increase productivity-Getting done more work

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Computer networks may be classified according to the scale

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Personal area network (PAN)

• .

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Local Area Network (LAN)•.

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Campus Area Network (CAN)• .

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Metropolitan area network (MAN).

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Wide area network (WAN)•.

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Mixed Net work

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Basic Types There are basically two types of Computer Networks

Local area networks

Wide area networks

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Difference

The main difference between the two is the way in which

they are geographically distributed

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Applications of Computer Network Access to Files and Folders on other Computers

Use other devices that are connected to other computers. ex: printers

To contact many on-line services

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Applications of Computer Network contd..

News Groups

Network Games

Voice mail

Video conferencing

Fax machine

Internet relay chat

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Summary

Introduction to networks

Definition of Computer network

Need for a Computer network

Types of computer networks

Applications

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Frequently Asked Questions

What is a computer network?

Explain the purpose of a computer network

What are the different types of computer networks?

What are the applications of computer network?

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QUIZ

1. Interconnection of computer systems is calleda) Operating systemb) Computer Networkc) Distributed systemd) None

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2. Which of the following are computer Network?

a) LANb) WANc) Both a and bd) None

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