Security

• What does a firewall do?

  Examines incoming packets and blocks unauthorised ones
• What can firewalls do?

  • Block IP addresses
  • Only allow certain IP addresses
  • Restrict certain ports
  • Inspect packets for key words or viruses
• What is encryption?

  The process of converting information into a code or cipher to prevent unauthorized access.
• What is two encryption disadvantages?

  • File access is slower
  • If key is forgotten the data is lost