Network protocols 1

  • Created by: Tomiwaq
  • Created on: 30-03-19 19:06
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  • Network protocols
    • Protocol rules
      • A protocol is a set of rules for how devices communicate and transmit data
      • Protocols cover
        • How communication should be from start to end
        • How the data should be organised
        • What the devices should do if data goes missing
    • MAC addresses
      • Every device needs a unique ID so it can be found on a network
      • MAC addresses are assigned to all network devices
      • They are unique to the device and cannot be changed
      • MAC addresses are 48 or 64 bit binary converted into hex
      • Mainly used by Ethernet protocol on LANs
      • LAN switches read it and direct it to the right device
    • IP addresses
      • Used when sending data between networks over the internet
      • IP addresses are not linked to hardware
      • Assigned either manually or automatically before the device can access the network
      • Static IP addresses (manual) are permanent
      • Static IP are very expensive
      • Dynamic IP addresses (automatic) changes every time it connects
      • Dynamic IP addresses are much cheaper
      • IP addresses are either 32 or 128 bit binary numbers

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