Purposes of Networks

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  • Purposes of Networks
    • LAN
      • network over a small area such as an office or a college
      • can be small as two devices connected via a cable
    • WAN
      • wide area network
      • works over a large geographical area
        • e.g business with sites across the country
    • MAN
      • metropolitan area network
        • large network that spans a metropolitan area or campus
          • falls between a WAN and a LAN
    • PAN
      • personal area network
      • any system using bluetooth within 10 metres
        • can be used to exchange data as well as synchronise devices
    • Circuit Switching
      • oriented data transmission
        • sends data across a fixed connection as a series of bits
    • Packet Switching
      • connectionless data transmission
        • a communication method in which packets are routed around a network
          • data is broken into packets that are routed around different areas
    • a packet is a segment of data sent from one device to another
    • TCP
      • transmission control protocol
        • breaks data into packets
          • assigns packet numbers

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