Definition computer networks: computer network is defined
as the interconnection of two or more computers. It is done to enable the
computers to communicate and share available resources.
APPLICATIONS:
I Sharing of resources such as printers
ii. Sharing of
expensive software's and database
iii. Communication from one computer to
another computer
iv. Exchange of data and information among
users via network v. Sharing of information over geographically wide areas.
THE USE OF COMPUTER
NETWORK
¨ Business Applications ¤ online
buying
¨ Home Applications ¤ mail, chat
¨ Mobile Users ¤ wireless: laptops, PDA, mobile, in plane
¨ Social Issues
•Sharing information
— i.e. data communication
•Sharing hardware or
software
¨ Centralize administration and support
COMPONENTS OF
COMPUTER NETWORK Ø
Two or more computers
Cables as links
between the computers
A network interfacing
card(NIC) on each computer
Switches
Software called
operating system(OS)
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