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In today's world, you'd have to work pretty hard these days to find someone who would argue, when

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you say that our computers have become invaluable to us personally and professionally, you know, that

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our society has become highly dependent on the resources they offer around on sharing them with each

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other.

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The ability to communicate with others completely hinges on the capacity to create and maintain solid,

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dependable networks.

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And those vitally important networks come in all shapes and sizes ranging from small and simple to humongous

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and super complicated, but whatever the flavor, they all need to be maintained properly.

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And to do that, well, we need to understand networking basics.

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So let us start by defining what is a network.

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Well, first things first.

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The dictionary defines the word network as a group or a system of interconnected people or things.

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Similarly, in the computer world, then the network means two or more connected computers that can

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share resources such as data and applications, office machines and Internet connection or a combination

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of these.

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Now you can see an image on the screen, it shows a really basic network made up of only two computers

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connected.

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They share resources such as file and even a printer hooked up to one of the hosts.

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These two hosts talk to each other using a computer language called as binary code, which consists

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of ones and zeros in a specific order that describes exactly what they want to see.

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So what really is networking?

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Well, networking is changing the way we do business and the way we live.

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Business decisions have to be made more quickly.

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And the decision makers require immediate access to information.

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So why do we have to wait for a week to arrive over the report from Germany through postman or courier

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service, whereas it could just arrive in mail mailbox instantaneously through computer networks, as

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you can see on the screen?

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We do not need to wait for a bank to transfer physical money, whether we could just transfer the money

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within the fraction of seconds.

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So now let's dive into technical terms, network is a set of devices connected by communication links,

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and a node can be a computer printer or any other device which is capable of sending and receiving data

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generated by other nodes on the network.

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A well-defined network must be able to meet a certain criteria.

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Most important of these are performance, reliability and security.

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So to be specific with computer technology, network is a connection of two or more computers that are

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linked to each other in order to carry out tasks such as printing, sharing, data, exchange of electronic

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media, transferring files, copying and pasting or whatever to computers can actually do so if we try

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to correlate networking with our day to day life.

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We can see that a group of friends are sharing ideas between the members of the group or discussing

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our various issues is also a network, right?

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It is a network of people.

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So network is basically defined by one factor.

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That is transfer of information from one point to another or from node to Donald.