08-11-2012, 05:58 PM
Networks, advantages and types of
1 - Network Types.ppt (Size: 357.5 KB / Downloads: 27)
What is a network?
Two or more computers that are interconnected so they can exchange data, information & resources. A networked connection allows computer to communicate with other devices.
Social networking sites allow users to exchange information.
Using groupware enables people to work on same project at same time.
Resource sharing
Internet connection
Printing
Software
Other resources including network-attached storage (NAS) servers; (device providing file based storage to other devices connected to network
2 Remote Services: ordering through the internet or in a B2B situation; where customer enters & checks data to make order; ATM eg. of remote service
Types of networks - by size
Local Area Network (LAN) – typically restricted to one building or one site (eg: Wedderburn College)
Wide Area Network (WAN) – spread over wide distances (eg: Commonwealth Bank)
Internet – the Network of Networks
WANs – Wide Area Networks
Wide Area Network (WAN) – broad geographic coverage (e.g. state-wide, country-wide, international)
Communications carried by a medium owned by someone who is not part of the organisation whose data is being transmitted
Transmission media include microwave, fibre-optic, telephone lines & sattellite.
WANs include:
MAN
Statewide network
National area network
World wide network, eg. internet
Co-axial cable
Most trusted in earlier networks
Carries data as electromagnetic signals
Good resistance against interference