This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “Frame Relay ”.

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1. The address field of a frame is 01101000 00001111. What is the DLCI?

  • 256
  • 416
  • 1024
  • none of the above

2. The address field of a frame is 00000000 00011111. What is the DLCI?

  • 256
  • 416
  • 1
  • none of the above

3. The address field of a frame is 00000100 00011111. What is the DLCI?

  • 256
  • 17
  • 1
  • none of the above

4. The address field of a frame is 00000100 00011001. There is congestion in the _______ direction.

  • forward
  • backward
  • both
  • no

5. The address field of a frame is 00000100 00010101. There is congestion in the _______ direction.

  • forward
  • backward
  • both
  • no

6. The address field of a frame is 00000100 00010111. The frame is _______ for discarding.

  • eligible
  • not eligible
  • conditionally eligible
  • we cannot say

7. Congestion avoidance in Frame Relay is done by the_________ and _______ bits.

  • FECN; DA
  • BECN; DA
  • BECN; FECN
  • none of the above

8. There is no congestion between DTE A and DTE B. The packet going from A to B has BECN bit _______ and FECN bit _________.

  • 0; 0
  • 0; 1
  • 1; 0
  • 1; 1

9. There is no congestion between DTE A and DTE B. The packet going from B to A has BECN bit _______ and FECN bit _________.

  • 0; 0
  • 0; 1
  • 1; 0
  • 1; 1

10. There is congestion between DTE A and DTE B in the direction A to B. The packet going from A to B has BECN bit _______ and FECN bit _________.

  • 0; 0
  • 0; 1
  • 1; 0
  • 1; 1

11. There is congestion between DTE A and DTE B in the direction A to B. The packet going from B to A has BECN bit _______ and FECN bit _________

  • 0; 0
  • 0; 1
  • 1; 0
  • 1; 1

12. There is congestion between DTE A and DTE B in the direction B to A. The packet going from A to B has BECN bit _______ and FECN bit _________.

  • 0; 0
  • 0; 1
  • 1; 0
  • 1; 1

13. There is congestion between DTE A and DTE B in the direction B to A. The packet going from B to A has BECN bit _______ and FECN bit _________.

  • 0; 0
  • 0; 1
  • 1; 0
  • 1; 1

14. There is congestion between DTE A and DTE B in both directions. The packet going from A to B has BECN bit _______ and FECN bit _________.

  • 0; 0
  • 0; 1
  • 1; 0
  • 1; 1

15. There is congestion between DTE A and DTE B in both directions. The packet going from B to A has BECN bit _______ and FECN bit _________.

  • 0; 0
  • 0; 1
  • 1; 0
  • 1; 1

16. A switch in Frame Relay uses the _______ algorithm to change bursty data to fixed-rate data.

  • token bucket
  • leaky bucket
  • both a and b
  • none of the above

17. A user access rate is 64 Kbps. The user _______________.

  • must never exceed this rate
  • can exceed this rate occasionally
  • must not exceed this rate if there is congestion
  • none of the above

18. A user CIR is 64 Kbps. The user _______________.

  • must never exceed this rate
  • can exceed this rate
  • can exceed this rate occasionally if the average is rate is 64 Kbps
  • none of the above

19. The CIR is _______ the access rate.

  • greater than
  • less than
  • equal to
  • none of the above

20. The Bc is _________ Be.

  • greater than
  • less than
  • equal to
  • none of the above

21. If the data sent during a period of T seconds is less than Bc, the user data ___________

  • will never be discarded
  • will be discarded if there is congestion
  • will be discarded
  • none of the above

22. If the data sent during a period of T seconds is greater than Bc but less than Bc + Be, the user data ___________.

  • will never be discarded
  • will be discarded if there is congestion
  • will be discarded
  • none of the above

23. If the data sent during a period of T seconds is greater than Bc + Be, the user data ___________

  • will never be discarded
  • will be discarded if there is congestion
  • will be discarded
  • none of the above

24. In the extended address format, the addresses in the Frame Relay can be______ bytes.

  • 2
  • 2 or 3
  • 2, 3, or 4
  • none of the above

25. In a 3-byte address, the DLCI subfield is _______ bits.

  • 6
  • 10
  • 16
  • none of the above

26. In a 4-byte address, the DLCI subfield is _______ bits.

  • 6
  • 23
  • 16
  • none of the above

27. In a two-bytes address, the value of the EA fields are_______ and _______ respectively.

  • 0; 0
  • 0; 1
  • 1; 0
  • none of the above

28. In a three-bytes address, the value of the EA fields are_______, _______ and _______ respectively.

  • 0; 0; 0
  • 0; 1; 0
  • 0; 0; 1
  • none of the above

29. In a four-bytes address, the value of the EA fields are_______, _______ and _______ respectively.

  • 0; 0; 0; 0
  • 0; 1; 0; 1
  • 0; 0; 0; 1
  • none of the above

30. Frame Relay is designed mostly for ________.

  • fixed-rate data
  • bursty data
  • voice grade data
  • none of the above

31. Bandwidth on demand means that the user has ______.

  • fixed-rate data
  • bursty data
  • voice grade data
  • none of the above

32. A company with 8 LANs needs _________ T-1 lines to connect them together.

  • 15
  • 56
  • 27
  • none of the above

33. Virtual circuit identifiers in Frame Relay operate in the _________ layer.

  • network
  • data link
  • transport
  • none of the above

34. A virtual circuit identifier in Frame Rely is called a ___________.

  • VCI
  • VPI
  • DLCI
  • none of the above

35. In a PVC connection, DLCIs are assigned _________.

  • temporarily
  • permanently
  • either a or b
  • neither a nor b

36. In an SVC connection, DLCIs are assigned __________.

  • temporarily
  • permanently
  • either a or b
  • neither a nor b

37. To create an SVC connection, the sending device issues a _______ frame.

  • setup
  • connect
  • release
  • release complete

38. To accept an SVC connection, the receiving device issues a _______ frame.

  • setup
  • connect
  • release
  • release complete

39. To terminate an SVC connection, the sending device issues a _______ frame.

  • setup
  • connect
  • release
  • release complete

40. To confirm the termination of an SVC connection, the receiving device issues a _______ frame.

  • setup
  • connect
  • release
  • release complete

41. Frame Relay uses a simplified version of HDLC called __________.

  • HDFR
  • LAPF
  • FRLAP
  • none of the above

42. LAPF is a _________ protocol.

  • bit-oriented
  • byte-oriented
  • character-oriented
  • none of the above

43. Which of the following fields from HDLC is missing in LAPF?

  • address
  • flag
  • control
  • FCS

44. What is the value of the flag field in HDLC?

  • 01010101
  • 01111110
  • 10000001
  • none of the above

45. In the non-extended format, the address field in the Frame Relay frame is _______ bits long.

  • 8
  • 16
  • 24
  • none of the above

46. The DLCIs in Frame Relay are defined as part of the _________ field.

  • control
  • address
  • flag
  • none of the above

47. A DLCI in Frame Relay is only _______ bits.

  • 8
  • 10
  • 6
  • none of the above

48. The DLCI field in Frame Relay is divided into two subfields of _______ and _______ bits respectively.

  • 5; 5
  • 4; 6
  • 6; 4
  • none of the above

49. The DLCI field in Frame Relay can define up to _________ DLCIs.

  • 512
  • 256
  • 1024
  • none of the above

Looking for more? Check out the below resources.

Data Communication and Networking MCQs by Behrouz A Forouzan
Computer Networking MCQs
Fundamentals of Networking Online Tests
Data Communication and Networking Online Tests
Data Communication and Networking Short Questions with Answers
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