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Communications and Networks (Networks (Advantages (Sharing output devices…
Communications and Networks
Networks
Advantages
Sharing output devices like printers saves money
Network users can communicate easier
Files can easily be shared between users.
Site licences are likely to be cheaper than buying several standalone licences.
Disadvantages
Hardware can be expensive
Managing a large network can be complex, often a network manager or administrator needs to be employed.
Viruses can spread easily through networks
Security procedures are needed to prevent such abuse e.g Firewall
Types
LAN
Bus network
Consists of a central cable which has terminators at either end
Computers and output devices are located at the end of branches off the central ccble.
As is the main server
http://i.imgsafe.org/e921d7eb73.png
WAN
The internet