Data Communication and Networking – Frame Relay MCQs

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

PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE

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

• 256
• 416
• 1024
• none of the above

B. 416

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

• 256
• 416
• 1
• none of the above

C. 1

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

• 256
• 17
• 1
• none of the above

B. 17

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

• forward
• backward
• both
• no

A. forward

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

• forward
• backward
• both
• no

B. backward

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

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

B. not eligible

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

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

C. BECN; FECN

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

A. 0; 0

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

A. 0; 0

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

B. 0; 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

C. 1; 0

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

C. 1; 0

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

B. 0; 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

D. 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

D. 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

B. leaky bucket

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

A. must never exceed this rate

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

C. can exceed this rate occasionally if the average is rate is 64 Kbps

19. The CIR is _______ the access rate.

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

B. less than

20. The B_c is _________ B_e.

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

D. none of the above

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

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

A. will never be discarded

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

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

B. will be discarded if there is congestion

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

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

C. will be discarded

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

C. 2, 3, or 4

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

• 6
• 10
• 16
• none of the above

C. 16

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

• 6
• 23
• 16
• none of the above

B. 23

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

B. 0; 1

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

C. 0; 0; 1

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

C. 0; 0; 0; 1

30. Frame Relay is designed mostly for ________.

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

B. bursty data

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

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

B. bursty data

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

• 15
• 56
• 27
• none of the above

D. none of the above

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

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

B. data link

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

• VCI
• VPI
• DLCI
• none of the above

C. DLCI

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

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

B. permanently

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

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

A. temporarily

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

• setup
• connect
• release
• release complete

A. setup

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

• setup
• connect
• release
• release complete

B. connect

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

• setup
• connect
• release
• release complete

C. release

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

• setup
• connect
• release
• release complete

D. release complete

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

• HDFR
• LAPF
• FRLAP
• none of the above

B. LAPF

42. LAPF is a _________ protocol.

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

A. bit-oriented

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

• address
• flag
• control
• FCS

C. control

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

• 01010101
• 01111110
• 10000001
• none of the above

B. 01111110

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

• 8
• 16
• 24
• none of the above

B. 16

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

• control
• address
• flag
• none of the above

B. address

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

• 8
• 10
• 6
• none of the above

B. 10

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

C. 6; 4

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

• 512
• 256
• 1024
• none of the above

C. 1024