HDLC Frames
Information Frames: User data
- Piggybacked Acks: Next frame expected
- Poll/Final = Command/Response
Supervisory Frames: Flow and error control
- Go back N and Selective Reject
- Final ? No more data to send
Unnumbered Frames: Control (bla, bla, bla …)
- Mode setting commands and responses
- Information transfer commands and responses
- Recovery commands and responses
- Miscellaneous commands and responses