NETWORK REVISION

NETWORK REVISION

1. Network topologies

   • bus
     • a network consists of a single cable that runs through the network
     • all devices attach to this single cable
     • advantages
       • cheap to install only one wire needed
     • disadvantages
       • high chance of catastrophic failure
       • high chance of collisions
       • more computers means more collisions so the networks gets gets slower as it gets bigger
   • ring
     • computers are connected to each other in a ring shape
     • communication only goes in one direction
     • advantages
       • cheap to install only one cable needed
       • no collisions only one computer is transmitting on each cable
     • disadvantages
       • high chance of catastrophic failure
       • difficult to add new computers
   • star
     • all computers are connected to a central switch
     • the switch directs the traffic to approch the computer
     • advantages
       • fast
       • easy to add new computers
       • low chance of catastrophic
     • disadvantages
       • very expensive
         • failure of the switch will take down the network

2. networks

   • LAN
     • LOCAL AREA NETWORK
   • WAN
     • WIDE AREA NETWORK