Networks

Networks

1. Advantages

   • Hardware and software can be shared
   • Networked computers can communicate
   • Networked computers can be centrally controlled by a network manager
   • Files on a server allow for easier backup schedules than if the files were stored on multiple computers.

2. Disadvantages

   • The cost of cabling and setting up can be high
   • A virus can be spread through a network quickly, infecting every computer
   • Hackers may gain unauthorised access to files saved on a network server
   • Networks can fail to work properly, causing loss or damage to data.

3. Types

   • LAN - Local Area Network
     • Maximum range of a couple of buildings
   • WAN - Wide Area Network
     • Made up of 2 or more LAN's
   • STAR - all computers are connected to one hub - most expensive due to large amount of cable
   • BUS - all information passes computer-to-computer - least efficient as more information = a slower running time
   • RING - All information passes computer-to-computer in a ring - if one computer breaks the whole ring breaks