Computer networking has various purposes which include:
resource sharing, remote communication, distributed processing facilities, cost effectiveness and reliability.
Anything available on the same network environment is referred to as a resource this include: printers, fax machines, data/information, modems, files etc.
Resource sharing is the idea of computers sharing resources in a common network. For example: in a computer lab, all computers can be able to share the same printer or scanner. Also information can be shared in all computers
Remote communication refers to the transmission of data signals between two communication devices located at different locations. A computer that tries to access resources from another computer on the network is called a remote client while the computer being accessed is called a remote host.
Remote communication has been made possible by use of wireless transmission media such as radio waves, microwave and satellite
Distributed data processing is a computer-networking method in which multiple computers across different locations share computer-processing capability. This is in contrast to a single, centralized server managing and providing processing capability to all connected systems. Computers that comprise the distributed data-processing network are located at different locations but interconnected by means of wireless or satellite links.
Files reside on the user's computer rather than on a central computer. Branch offices in a large organization have their own servers that store data, information and other resources required for the daily operations. This servers would periodically update the central computer.
Even though the initial cost is higher, the savings experienced and the value added to service delivery make them a ready choose for enterprising managers. Networks greatly increase the efficient use of scarce resources thus saving operational costs
A computer network is reliable because:
Data and information is more prone to illegal access than where there is no networking. Computer crimes like tapping of information is common
Initial costs of acquiring network resources like hardware and software is high
Large networks like the internet have chat rooms and messaging services that enable underage children to meet peers and adults on the net some of whom may have bad intentions. e.g access to drugs information and pornographic contents
The easy flow of information keeps even those who are on the wrong side of the law communicating easily. Terrorists and drug traffickers use information networks for their business communications
All businesses these days is dependent on computer networks. And if a network fails, businesses will halt to a stand still and bring enormous losses.
In a network there are users
who consume a lot more bandwidth than others. Because of this some
other people may experience difficulties.
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