networks

• What is Encryption used for?


  To prevent unauthorized reading of data
• WAN

  wide area network:

  Can be used up to a global level
• LAN

  Local area network:

  used on one site-> owned by company
• PAN


  personal area network:

  Owned by you eg hotspot
• star network


  • reduced data collision
  • connected to a central node
  • robust- if one fails then the rest are fine
  • increased security
• Bus network


  Prone to data collisions

  if bus wire fails then everything fails

  require less cabling
• Wired network 


  use fibre optic cables to transfer data

  has lots of bandwidth

  more secure need to be connected to cable to access data on the network
• Wireless network


  Transfers data without wire

  less money spent on hard wear

  everything connected to router

  need to be within radius of the router for it to work

  speed is slower

  devices are easily added on