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CHAPTER 1 3 INFORMATIC PRACTICES XII WEB.pdf


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COMPUTER NETWORKING

Collaborative User Interaction:
Let us take one more example of a school. Here we assume that all the computers in the
school are connected to one main computer (called server). After the exams, teachers
have to exchange marks with each other for result preparation. So all the teachers enter
the marks class wise for their respective subjects at one centralized location and from
there the class teachers can copy the marks of their classes and can prepare the result.
This way data is shared on a computer network. Similar is the case with other
computerized organizations also.
Let us take another example of collaborative user interaction. If we are working on a
computer which is a part of a computer network, we can communicate with any other
user of the network through e-mail or chatting. It takes negligible time to send and
receive messages and watch live videos of one another irrespective of terrestrial
distances. If the e-mail or chatting is done for some useful purpose, it leads to increased
productivity, cost-saving as well as time-saving.
Increased Storage:
On a network, same data may be replicated on multiple computers to ensure the
availability of data in the case of some computer getting faulty. For example, when you
save your java applications on your computer, you can also store their copies on some
other networked computers in your lab. This way your work will be available even if your
computer develops some fault or somehow your programs are deleted from your
computer. Similarly, on large networks also the data is replicated on multiple computers
as if a huge storage area is available to store multiple copies of the data.
All these advantages are there for a small organization like a school as well as for big
business organizations and for governments. Today, small as well as big organizations,
and governments keep their data on secured large scale computers called servers. They
share this data with authorized users. This ensures security. Customer care cells of
companies share the resources and data and they also communicate among themselves as
well as with customers with the help of computer networks only.

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