Networks

Networks

1. Topologies

   • Star
     • Advantages
       • If one cable fails only one computer is down
       • Extra computers can be added without slowing network
       • Easy to add extra devices
     • Disadvantages
       • High cost
       • Server fails then network is down
   • Ring
     • Advantages
       • Not dependant on central computer
       • Each computer has equal access (No computer 'hogs' network)
     • Disadvantages
       • Break in connection causes network fail
       • Faults difficult to locate
       • Network goes down if adding equipment
   • Bus
     • Advantages
       • Cheap as little cable needed
       • Easy to install
       • Easy to add extra devices
     • Disadvantages
       • More than 12 devices slows network
       • If the main cable breaks, network fails

2. Wireless Networks

   • Advantages
     • Allows inexpensive LANS to be setup
     • People can work wherever they get a signal
     • Global set of standards
   • Disadvantages
     • High power consumption
     • Possible WiFi health problems
     • Less security
     • Limited range at home
     • Interference if networks overlap