Network protocols 2

  • Created by: Tomiwaq
  • Created on: 30-03-19 19:31
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  • Network protocols
    • Packets
      • Data sent between networks are split into packets
      • Every data packet has a header that controls its information
      • The header controls the packet's final destinatio, the source address and the packet number
      • The data packet's payload is a part of an email, document, web page or streamed video
      • Also likely to include a checksum number
        • A form of validation used to check that the payload hasn't been corrupted during transit
    • Packet switching
      • Used by routers to direct packets on networks
      • 1) The sending device splits the data into packets to be sent across the network
      • 2) Each packet is given a packet number to show the order of data
        • 3) Each router reads the packet header and decides which way to send the packet next
          • 4) The way the data is sent changes depending on network traffic
            • 5) Packets arrive in the wrong order because they take different routes
      • Packet switching is efficient because of numerous routes


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