The main reasons for networking are as follows


1.   Resource Sharing: Without sharing the physical location of any user we can authorize them to share data. 

2.   Reliability:
he is provided by having an alternative source of data available for use. For example,
files can be replicated on two or three PCs; so if one of them is unavailable
due to hardware failure, the other PCs can be used. In addition, the presence of multiple CPUs(Central Processing Unit) means that if one goes
down, the others may be able to take over its work. This is of utmost
importance in banking, air traffic control, etc., which need to continue operating
in case of hardware problems.

3.    Financial
Small computers have a better price to performance ratio as compared
to large ones. A mainframe computer may be ten times faster than a PC, but it
may cost a hundred times more. As a result, most organizations prefer to maintain
a computer network consisting of a set of personal computers rather than
centralized large computers.

Better Communication Medium:
In an organization with a number of branches
a far of places, networking of computers facilitates a cheap and easy mode of
communication. It is possible to transfer any kind of data or information to
any other destination immediately. If any users add or delete any file, all the other users on the network can see that. 

5.    Access
to Remote Database
By getting access to the remote database, we can get rid of unnecessary trouble and wastage of costly time. From a remote
place to part of the world, a user can book an air ticket from one city to
another, accommodation in hotels and get instant confirmation also.

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