Computer Network By Febeeh Azeez Computer Network v

Computer Network By Febeeh Azeez

Computer Network v A collection of computing devices that are connected in various ways in order to communicate and share resources. Usually, the connections between computers in a network are made using physical wires or cables. However, some connections are wireless, using radio waves or infrared signals Ø Next Need For Network

Need For Network v Internet is a good example for a computer network. It is impossible to imagine a world without emails, online newspapers, blogs, chat and other services offered throught the internet. Apart from these, there are many other advantages in using networked computer instead of stand-alone computers. Some of them are listed below Ø Ø Ø Resource sharing Price-performance ratio Communication Reliability Scalability Ø Next Resource sharing

Resource sharing v The sharing of available hardware and software resources in a computer network is called resource sharing. Example: v v Hardware : Hard disk, Printer, Scanner, etc. Software : Anti-virus tools, Application software, etc. Ø Next Price-performance Ratio

Price-performance Ratio v One can easily share the resources available in one computer with other computers. The cost of purchasing licensed software for each computer can be reduced by purchasing network version of such software. This will least affect the performance of such resources and lead to considerable savings in cost. Ø Next Communication

Communication v Computer network helps user to communicate with any other user of the network through its services like email, chatting, video conferencing, etc. v For example, one can send or receive messages within no time irrespective of the distance Ø Next Reliability

Reliability v It is possible to replicate or backup data/information in multiple computers using the network. For example, the C++ files, photos or songs saved in one computers can also be saved in other computers in the same network. These can be retrieved from other computers in which they are saved in case of disasters. Ø Next Scalability

Scalability v Computing capacity can be increased or decreased easily by adding or removing computers to the network. In addition to this, the storage capacity of networks can also be increased by including more storage devices to the network.

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