Data Link Protocols Asynchronous Protocols XMODEM frame ...

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HDLC Frame: Flag fieldBit Stuffing• How to differentiate data and flag?• Adding one extra 0 whenever there are fiveconsecutive 1s in the data31 of 5332 of 53HDLC: Bit stuffingHDLC frame: Address field• Primary station creates a frame destination address• Secondary station creates a frame source address• Can be one byte or more33 of 5334 of 53HDLC Frame: Address fieldHDLC Frame: Control field35 of 5336 of 536
HDLC frame: Poll / FinalHDLC Frame: Information field37 of 5338 of 53HDLC Frame: FCS fieldHDLC: S-FrameFCS: Frame check sequence39 of 5340 of 53HDLC: Use of P/F fieldHDLC: Use of P/F fieldPiggybacking:data + ack41 of 5342 of 537
Page 1 and 2: Data Link ProtocolsData Link Protoc
Page 3 and 4: Control framesControl frames13 of 5
Page 5: HDLC Configurations:SymmetricalHDLC
Page 9: HDLC: U-Frame control fieldHDLC: Po

Data Link Protocols Asynchronous Protocols XMODEM frame ...

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