Data Communication and Networking – Data Link Control MCQs

1. In a Go-Back-N ARQ, if the window size is 63, what is the range of sequence numbers?

2. In Go-Back-N ARQ, if frames 4, 5, and 6 are received successfully, the receiver may send an ACK _______ to the sender.

3. ARQ stands for _______.

4. For Stop-and-Wait ARQ, for 10 data packets sent, _______ acknowledgments are needed

5. HDLC is an acronym for _______

6. Data link control deals with the design and procedures for ______ communication

7. ______ in the data link layer separates a message from one source to a destination, or from other messages going from other sources to other destinations

8. In _______ framing, there is no need for defining the boundaries of frames.

9. In ________ framing, we need a delimiter (flag) to define the boundary of two frames.

10. _________framing uses two categories of protocols: character-oriented and bit-oriented.

11. In a ________ protocol, the data section of a frame is a sequence of characters.

12. In a _________ protocol, the data section of a frame is a sequence of bits.

13. In _________ protocols, we use ________

14. Byte stuffing means adding a special byte to the data section of the frame when there is a character with the same pattern as the ______

15. In ________ protocols, we use ________

16. Bit stuffing means adding an extra 0 to the data section of the frame when there is a sequence of bits with the same pattern as the ________

17. _______ control refers to a set of procedures used to restrict the amount of data that the sender can send before waiting for acknowledgment

18. ____ control refers to methods of error detection and correction

19. The Simplest Protocol and the Stop-and-Wait Protocol are for ______ channels

20. The Stop-And-Wait ARQ, Go-Back-N ARQ, and the Selective Repeat ARQ are for ______ channels

21. The ____ Protocol has neither flow nor error control

22. The _______Protocol has flow control, but not error control

23. The _______Protocol has both flow control and error control

24. In the _____ Protocol, the sender sends its frames one after another with no regard to the receiver

25. In the _____ Protocol, the sender sends one frame, stops until it receives confirmation from the receiver, and then sends the next frame.

26. The _________Protocol, adds a simple error control mechanism to the _______Protocol

27. In the _________Protocol, if no acknowledgment for a frame has arrived, we resend all outstanding frames.

28. In the _________ protocol we avoid unnecessary transmission by sending only frames that are corrupted

29. Both Go-Back-N and Selective-Repeat Protocols use a _________

30. In Go-Back-N ARQ, if 5 is the number of bits for the sequence number, then the maximum size of the send window must be _____

31. In Go-Back-N ARQ, if 5 is the number of bits for the sequence number, then the maximum size of the receive window must be _____

32. In Selective Repeat ARQ, if 5 is the number of bits for the sequence number, then the maximum size of the send window must be _____

33. In Selective Repeat ARQ, if 5 is the number of bits for the sequence number, then the maximum size of the receive window must be _____

34. High-level Data Link Control (HDLC) is a _______ protocol for communication over point-to-point and multipoint links.

35. The most common protocol for point-to-point access is the Point-to-Point Protocol (PPP), which is a _________protocol

36. ______ control refers to a set of procedures used to restrict the amount of data that the sender can send before waiting for acknowledgment.

37. _________control in the data link layer is based on automatic repeat request, which is the retransmission of data.

38. In Stop-and-Wait ARQ, we use sequence numbers to number the frames. The sequence numbers are based on __________arithmetic

39. In Stop-and-Wait ARQ, the acknowledgment number always announces in ______ arithmetic the sequence number of the next frame expected

40. In the Go-Back-N Protocol, if the size of the sequence number field is 8, the sequence numbers are in ________ arithmetic

41. Stop-and-Wait ARQ is a special case of Go-Back-N ARQ in which the size of the send window is 1.

42. In _________, the station configuration is unbalanced. We have one primary station and multiple secondary stations.

43. In _________, the configuration is balanced. The link is point-to-point, and each station can function as a primary and a secondary

44. In PPP, the ________ is responsible for establishing, maintaining, configuring, and terminating links

45. In PPP, ________ is a simple authentication procedure with a two-step process:

46. In PPP, _______ is a three-way hand-shaking authentication protocol in which the password is kept secret; it is never sent online.