Unit 5: Communication (GCSE Computer Science)

Unit 5: Communication (GCSE Computer Science)

1. Networks

   • LAN
     • Advantages
     • Disadvantages
   • WAN
     • Disadvantages
     • Advantages

2. Topologies

   • Bus
   • Ring
   • Ring
   • Star

3. Hardware

   • Switch
     • A switch is a complex device It keeps a table of every device that connects to it When a packet of data is received then sends the packet to the device With a switch only.
   • Hub
     • A hub is a “stupid” version of a switch A hub keeps no records of what is connected to it When it receives a packet, it forwards it on to every other device It is up to each computer to accept or reject the packet, as all computers receive every packet.
   • Bridge / Gateway
   • WAP and NIC