Disadvantages of Networks

• The main disadvantage of networks is that users become dependent upon them. For example, if a network file    server develops a fault, then many users may not be able to run application programs and get access to shared data. To overcome this, a back-up server can be switched into action when the main server fails. A fault on a network may also stop users from being able to access peripherals such as printers and plotters. To minimize this, a network is normally segmented so that a failure in one part of it does not affect other parts.
•  Another major problem with networks is that their efficiency is very dependent on the skill of the systems manager. A badly managed network may operate less efficiently than non-networked computers. Also, a badly run network may allow external users into it with little protection against them causing damage. Damage could also be caused by novices causing problems, such as deleting important files.

All these could be summarized as below:

1. If a network file server develops a fault, then users may not be able to run application programs
2. A fault on the network can cause users to loose data (if the files being worked upon are not saved)
3. If the network stops operating, then it may not be possible to access various resources
4. Users work-throughput becomes dependent upon network and the skill of the systems manager
5.  It is difficult to make the system secure from hackers, novices or industrial espionage
6.  Decisions on resource planning tend to become centralized, for example, what word processor is used, what printers are bought, e.t.c.
7.  Networks that have grown with little thought can be inefficient in the long term.
8.  As traffic increases on a network, the performance degrades unless it is designed properly
9. Resources may be located too far away from some users
10.  The larger the network becomes, the more difficult it is to manage.