HDLC -synchronous xmission -1 frame format

• flag - 8 bits -

  • 01111110 (bit stuffing used to avoid in data)

• address - one or more octets

• control 8 or 16 bits

• information - variable

• frame check sequence CRC-16 or 32

• flag - 8 bits - 1 flag can close & open frames

flag address control data FCS flag

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