Data Communication and Networking – Data link Protocols – Synchronous Protocols – Bit-Oriented Protocol MCQs

1. Control information in a system using _______ protocol can be just one or a multiple number of bits

2. _______ is the basis for all bit-oriented protocols in use today

3. AN HDLC _______ station sends commands.

4. AN HDLC _______ station sends responses

5. AN HDLC _______ station sends both commands and responses

6. In a _______ configuration, an HDLC primary station and several secondary stations are connected

7. In an HDLC _______ configuration, the connected stations each consist of two logical stations (primary and secondary)

8. In an HDLC _______ configuration, both stations are of the combined type.

9. In an HDLC _______ configuration, a physical station can send both commands and responses

10. In HDLC, the _______ describes which station has control of the link.

11. In the HDLC _______, the secondary device must have permission from the primary before it can transmit.

12. There are _______ types of HDLC frames.

13. An HDLC _______ is used to transport user data and control information.

14. An HDLC _______ can transport system management information.

15. The HDLC flag field is _______.

16. HDLC inserts a redundant 0 bit after the _______ consecutive 1 bit in the message data.

17. If the HDLC flag field pattern is found in the message data field, it needs to be altered through _______

18. If the HDLC receiver counts more than six but less than fifteen consecutive 1s, this signifies _______

19. If the HDLC receiver counts fifteen or more consecutive 1s, this signifies _______.

20. If the HDLC receiver counts exactly six consecutive 1s, this signifies _______

21. If the HDLC receiver counts exactly five consecutive 1s, this signifies _______

22. When primary station A sends an HDLC frame to secondary station B, the address field contains the _______

23. When secondary station B sends an HDLC frame to primary station A, the address field contains the _______

24. In a five-byte HDLC address field, _______ in a 0 bit and _______ in a 1 bit

25. If the least significant bit of a byte in an HDLC address field is 1, this means there are _______ more address bytes

26. If the first two bits of an HDLC control field both 1s, this signifies _______.

27. All HDLC control fields contain _______.

28. The HDLC _______ indicate the number of the frame being sent.

29. The HDLC _______ for acknowledgment.

30. _______ contains both N(S) and N(R) bits

31. _______ contains neither N(S) nor N(R) bits.

32. _______ is sent when acknowledgment is needed but there is no user data to transmit

33. The HDLC control field in _______ is increased to two bytes in the extended mode

34. The HDLC P/F bit means poll when the frame is sent by a _______ station to a _______ station.

35. The HDLC P/F bit means final when the frame is sent by a _______ station to a _______ station

36. An HDLC frame uses _______ for error detection.

37. In an HDLC S-frame the N(R) field can contain _______.

38. Negative acknowledgment requires an HDLC S-frame with the code field set to _______

39. Polling or selecting requires an HDLC S-frame with the code field set to _______

40. The HDLC U-frame has a _______ bit code field

41. The U in U-frame stands for _______.

42. Mode setting is handled by the _______ -frame.

43. Disconnection and initialization are handled by the _______ frame.

44. A secondary station has three data frames to send in response to a poll. The P/F bit for the first frame is _______, for the second frame it's _______, and for the third (last) frame it's _______