topologies

• Networks can be arranged in different topologies
• Encryption is used to ensure that messages can be sent securely over a network
• Network


  A group of interconnected computers/devices connected for the purpose of communication
• Stand-alone device


  A device that is not connected to a network or other device
• Devices that can be connected to a network

  • PCs
  • Smartphones
  • Smartwatches
  • Fitness trackers
  • Car engine management systems
  • Internet-enabled fridges
  • Intelligent personal assistants
  • Media boxes
• Advantages of using networks


  • File sharing
  • Hardware sharing
  • Communication (email, chat, video)
  • Roaming access
• Additional advantages of larger networks


  • Centralised maintenance and updates
  • Centralised security (anti-virus, firewalls)
  • User monitoring
  • Levels of access
• Disadvantages of networks


  • Cost
  • Management by technical staff
  • Spread of malware
  • Hacking