Network

Network

1. two main types

   • LAN: covers small area such as on site/building
   • WAN: covers a large geographical area usually connects to internet
   • the three sub-networks
     • Bus network
       • advantages
         • easy to install
           • cheap to install doesnt require much cable
       • disadvantages
         • if main cable fails whole network goes down
           • more work stations connected performance network become slower
             • every stations sees all data on a network this is a security risk
     • Ring network
       • disadvantages
         • if main cable fails or any devices faulty then whole thing fails
       • advantages
         • cheap to set up
           • can tranfer data quickly even if lots of devices are connected (data flows in one direction wont be any collisions
     • Star network
       • disadvantages
         • expensive to install uses most cable
           • extra hardware required which adds to cost
             • if hub or switch fails all devices connected to it will have no network connections
       • advantages
         • very reliable if one cable or device fails others still work
           • high performing as no data collisions can occur

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