Networks

Networks

1. Topologies

   • Bus
     • Computers and other devices (nodes) attached to a single backbone
   • Ring
   • Star

2. Key Words

3. Topologies

   • Ring
     • Data passes through each node, carried in data units called tokens
   • Bus
     • Computers and other devices (nodes) attached to a single backbone
     • Advantages
       • Easy to set up
       • Cheap as not much cable needed
     • Disadvantages
       • Problems with backbone can bring down entire network
       • Limited distance can be covered
       • Many collisions slow network down
       • Every node 'sees' all the data, which is a security risk
   • Star
     • Client machines connected to a central switch or hub which is usually connected to one or more servers
     • Advantages
       • Robust as problems with a connection don't affect the whole network
       • Fewer data collisions than bus, so faster

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