802.3 Ethernet MAC Layer Frame

• Preamble and Start of Frame Delimiter

  • To synchronize receiver’s clock
  • Preamble is 56-bit alternating 101010… pattern
  • SFD is 10101011 to end the synchronization
  • Together, 64-bit synchronizing pattern

Pre

SFD

DA

SA

Len

Data

PAD

FCS

Ethernet 802.3 MAC Layer Frame

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