In this section of Data Communication and Networking – Virtual-Circuit Networks: Frame Relay and ATM MCQ (Multiple Choice) Based Questions and Answers,it cover the below lists of topic. All the Multiple Choice Questions and Answers (MCQs) have been compiled from the book of Data Communication and Networking by The well known author behrouz forouzan.

This Section covers below lists of topics.

  1. Virtual circuit switching MCQs.
  2. Frame Relay MCQs.
  3. Asynchronous Transfer Mode (ATM) MCQs.
  4. User-to-network interface (UNI) MCQs.
  5. Network-to-network interface (NNI) MCQs.

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1. ________ is a virtual-circuit wide-area network that was designed in response to demands for a new type of WAN in the late 1980s and early 1990s.

  • X.25
  • Frame Relay
  • ATM
  • none of the above

2. Frame Relay provides ________

  • PVCs
  • SVCs
  • either (a) or (b)
  • neither (a) nor (b)

3. VCIs in Frame Relay are called ______.

  • PVC
  • SVC
  • DLCIs
  • none of the above

4. In Frame Relay, when a _____ is selected, the corresponding table entry is recorded for all switches by the administrator

  • PVC
  • SVC
  • either (a) or (b)
  • neither (a) nor (b)

5. In Frame Relay, when. ______ is selected, it requires establishing and terminating phases

  • a PVC
  • an SVC
  • either (a) or (b)
  • neither (a) nor (b)

6. Frame Relay has _______

  • only the physical layer
  • only the data link
  • the physical and data link layers
  • the physical, data link, and network layers
  • flow
  • error
  • either (a) or (b)
  • neither (a) nor (b)

8. Frame Relay networks offer an option called ______________ that sends voice through the network.

  • VOFR
  • FRAD
  • MUX
  • none of the above

9. In Frame Relay, an address can be ________ bytes

  • only 2
  • 2 to 3
  • 2 to 4
  • none of the above

10. ________ is the cell relay protocol designed by the corresponding Forum and adopted by the ITU-T

  • X.25
  • Frame Relay
  • ATM
  • none of the above

11. In Frame Relay, the EA field defines the number of bytes; it is _____ in the last byte of the address

  • 0
  • 1
  • 2
  • 3

12. A _______ is defined as a small, fixed-size block of information

  • frame
  • packet
  • cell
  • none of the above

13. To handle frames arriving from other protocols, Frame Relay uses a device called a _________

  • VOFR
  • FRAD
  • MUX
  • none of the above

14. In ATM, a virtual connection is defined by _________

  • VPI
  • VCI
  • DLCI
  • a combination of (a) and (b)

15. The ATM standard defines ______ layers

  • two
  • three
  • four
  • five

16. The VPI of a UNI is _______ bits in length

  • 8
  • 12
  • 16
  • 24

17. The VPI of an NNI is _______ bits in length

  • 8
  • 12
  • 16
  • 24

18. The ATM data packet is a cell composed of ______ bytes

  • 40
  • 50
  • 52
  • 53

19. ______ eliminates the varying delay times associated with different-size packets

  • X.25
  • Frame Relay
  • ATM
  • all of the above

20. A(n) ______ is the interface between a user and an ATM switch.

  • UNI
  • NNI
  • NNN
  • None of the above

21. ________ is the interface between two ATM switches.

  • UNI
  • NNI
  • NNN
  • none of the above

22. In ATM, connection between two endpoints is accomplished through _______

  • TPs
  • VPs
  • VCs
  • all of the above

23. In ATM, the _______layer accepts transmissions from upper-layer services and maps them into ATM cells

  • physical
  • ATM
  • AAL
  • none of the above

24. In ATM, the ______ layer provides routing, traffic management, switching, and multiplexing services

  • physical
  • ATM
  • AAL
  • none of the above

25. In ATM, the _____ layer defines the transmission medium, bit transmission, encoding, and electrical-to-optical transformation

  • physical
  • ATM layer
  • AAL
  • none of the above

26. The AAL is divided into _______ sublayers

  • two
  • three
  • four
  • none of the above

27. In ATM, ______ is for constant-bit-rate data.

  • AAL1
  • AAL2
  • AAL3/4
  • AAL5

28. In ATM, _______is for short packets

  • AAL1
  • AAL2
  • AAL3/4
  • AAL5

29. In ATM, _____ is for conventional packet switching (virtual-circuit approach or datagram approach).

  • AAL1
  • AAL2
  • AAL3/4
  • AAL5

30. In ATM, ______ is for packets requiring no sequencing and no error control mechanism.

  • AAL1
  • AAL2
  • AAL3/4
  • AAL5
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