Preamble of 802.11b Packets

• Used to mark the start of the packet

• Always transmitted at 1 Mbps

• Sub fields of Preamble

  • Long preamble version
    • 16 sync bytes of alternating 1’s and 0’s
    • 1 byte of start of frame delimiter (1010101)
  • Short preamble version
    • 7 sync bytes
    • 1 byte of start of frame

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