What do you mean by Computer Network? What are its advantages and disadvantages?

 


What do you mean by Computer Network? What are its advantages?

Answer:- 

A computer network consists of two or more computers that are linked in order to share resources such as printers and CD-ROMs, exchange files, or allow electronic communications. The computers on a computer network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams.



Advantages:

1. Sharing devices such as printers saves money.

2. Site (software) licenses are likely to be cheaper than buying several stand alone licenses.

3. Files can easily be shared between users.

4. Network users can communicate by email and instant messenger.

5. Security is good - users cannot see other users' files unlike on stand-alone machines.

6. Data is easy to backup as all the data is stored on the file server.

Disadvantages:- 

1. Purchasing the network cabling and file servers can be expensive.

2. Managing a large network is complicated, requires training and a network manager usually needs to be employed.  

3. If the file server breaks down the files on the file server become inaccessible.

4. Viruses can spread to other computers throughout a computer network.

5. There is a danger of hacking, particularly with wide area networks. Security procedures are needed to prevent such abuse, e.g. a firewall.



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