HDLC Command/Response Repertoire
| Type Of Frame | Name | Command/ Response |
Description | Info | C-Field Format | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |||||
| Information(I) | C/R | User exchange data | N(R) | P/F | N(S) | 0 | ||||||
| Supervisory (S) | Receive Ready (RR) | C/R | Positive Acknowledgement | Ready to receive I-frame N(R) | N(R) | P/F | 0 | 0 | 0 | 1 | ||
| Receive Not Ready (RNR) | C/R | Positive Acknowledgement | Not ready to receive | N(R) | P/F | 0 | 1 | 0 | 1 | |||
| Reject (REJ) | C/R | Negative Acknowledgement | Retransmit starting with N(R) | N(R) | P/F | 1 | 0 | 0 | 1 | |||
| Selective Reject (SREJ) | C/R | Negative Acknowledgement | Retransmit only N(R) | N(R) | P/F | 1 | 1 | 0 | 1 | |||
Read more about this topic: High-Level Data Link Control
Famous quotes containing the words command, response and/or repertoire:
“But, to speak practically and as a citizen, unlike those who call themselves no-government men, I ask for, not at once no government, but at once a better government. Let every man make known what kind of government would command his respect, and that will be one step toward obtaining it.”
—Henry David Thoreau (1817–1862)
“Perhaps nothing in all my business has helped me more than faith in my fellow man. From the very first I felt confident that I could trust the great, friendly public. So I told it quite simply what I thought, what I felt, what I was trying to do. And the response was quick, sure, and immediate.”
—Alice Foote MacDougall (1867–1945)
“For good teaching rests neither in accumulating a shelfful of knowledge nor in developing a repertoire of skills. In the end, good teaching lies in a willingness to attend and care for what happens in our students, ourselves, and the space between us. Good teaching is a certain kind of stance, I think. It is a stance of receptivity, of attunement, of listening.”
—Laurent A. Daloz (20th century)