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13. Networks

Candidates should be able to:

13.1 Network components

  • describe the role and operations of the following components in a network: switches, hubs, wireless access points, network interface cards, wireless network interface cards, routers, repeaters, gateways, bridge, firewalls (hardware and software) and servers
  • describe bandwidth
  • describe bit rate
  • describe bit streaming (both real time and on demand)
  • discuss the importance of bit rates/broadband speed on bit streaming
  • describe packet switching, circuit switching and message switching
  • describe optical communication/transmission methods (fibre optic, laser), their advantages, disadvantages and their typical applications
  • evaluate wireless communication/transmission methods (including: Bluetooth, infrared, WiFi, radio), their advantages, disadvantages and their typical applications
  • explain the importance of bandwidth and bit rate when transmitting data
  • analyse how different types of communication/transmission media (cables, wireless, optical) govern the bandwidth available for transmitting data
  • describe what a protocol is and different types of protocols (including: Wide Area Network protocols and Local Area Network access protocols)
  • describe how the BitTorrent protocol provides peer-to-peer file sharing

13.2 Network security

  • describe the security issues that could arise from networking computers
  • explain how security issues can be prevented on a computer network
  • evaluate a range of physical and software based security methods for a computer network
  • list the principles of a data protection act
  • analyse the need for a data protection act
  • evaluate methods for combating IT crime (including: physical security methods, biometric methods, firewalls, back-up, encryption, access rights, malware security, antivirus, anti-spyware)

13.3 Satellite Communication Systems

    • describe how Satellite Communication Systems are used and work in data transfer systems, television and radio broadcasting systems and global positioning systems (GPS)
    • discuss the advantages and disadvantages of using satellites for data transfer systems, television and radio broadcasting systems, and GPS





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