GCSE > Computer Science > AQA > GCSE Computer Science > COMPUTER SYSTEMS: Networks > LAN and WAN
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COMPUTER SYSTEMS: Encoding and compression

COMPUTER SYSTEMS: Network topologies

COMPUTER SYSTEMS: Wired and wireless networks, protocols, and layers

COMPUTER SYSTEMS: Threats to computer systems and networks

COMPUTER SYSTEMS: Operating systems and utility software

COMPUTER SYSTEMS: Impact of technology on society

ALGORITHMS AND PROGRAMMING: Types of data

ALGORITHMS AND PROGRAMMING: Producing robust programs

ALGORITHMS AND PROGRAMMING: Designing, creating, and refining algorithms

ALGORITHMS AND PROGRAMMING: Programming languages

ALGORITHMS AND PROGRAMMING: Artificial Intelligence (AI)

  • LAN (Local Area Network): 
    • Small geographic area (homes, schools, small businesses) 
    • Owned and managed by the organisation 
    • Can be wired, wireless, or both
  • WAN (Wide Area Network): 
    • Large geographic area (e.g. different cities or countries) 
    • Used by multinational companies 
    • The internet is the largest WAN 
    • Telecom companies usually own the infrastructure

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