1. CS2060 HIGH SPEED NETWORKS QUIZ 1

2. 1. Which among the following 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 ? a)X.25 b)Frame Relay c)ATM d)none of the above

3. 2.Which of the following does frame relay provides ? a)PVCs b)SVCs c)either (a) or (b) d)neither (a) nor (b)

4. 3How VCIs in Frame Relay are called so ? A) Logical Link B) Frame C) DLCIs D)none of the above

5. 4Which type of circuit is to be selected in Frame Relay, so that the corresponding table entry is recorded for all switches by the Administrator ? A)Permanent virtual circuit B)frame mode bearer C)either (a) or (b) D)None of the above

6. 5 Which type of circuit is to be selected in Frame Relay, in order to meet the requirements of establishing and terminating phases ? A)Switched virtual circuit B)Semi permanent virtual circuits C)Both (a) and (b) D)None of the above

7. 6 Which of the following does Frame Relay has ? A)only the physical layer B)only the data link C)the physical and data link layers D)the physical, data link, and network layers

8. 7Which of the following control does the frame relay used protocol provides at the data link layer? A)flow B)error C)either (a) or (b) D)neither (a) nor (b)

9. 8 Which of the following bytes is the address limit in the Frame Relay ? A)only 2 B)2 to 3 C)2 to 4 D)none of the above

10. 9Which of the following number of bytes denotes the last byte of the address in the EA field as defined in the Frame Relay ? A)0 B)1 C)2 D)3

11. 10. Which of the following devices does Frame Relay use, in order to handle frames arriving from other protocols ? A)DEMUX B)Frame Relay Access Device C)MUX D)none of the above

12. 11. Which of the following option does Frame Relay networks offer, that sends voice through the network ? A)Voice Over Frame Relay B)FRAD C)Identifier D)All of the above

13. 12. Which of the following is the cell relay protocol designed by the corresponding Forum and adopted by the ITU-T ? A)X.25 B)Frame Relay C)ATM D)none of the above

14. 13. Which of the following is defined as a small, fixed-size block of information ? A)frame B)packet C)cell D)none of the above

15. 14. Which of the following defines a virtual connection in ATM ? A)VPI B)VCI C)DLCI D)a combination of (a) and (b)

16. 15. Which of the following denotes the layers defined in the ATM standard ? A)two B)three C)four D)five

17. 16. In which of the following, we try to avoid traffic congestion ? A)congestion control B)quality of service C)either (a) or (b) D)both (a) and (b)

18. 17. What is the length of the VPI of a NNI ? A)8 B)12 C)16 D)24

19. 18. Which of the following number of bytes does the ATM data packet is composed of ? A)40 B)50 C)52 D)53

20. 19. Which of the following eliminates the varying delay times associated with different-size packets ? A)X.25 B)Frame Relay C)ATM D)all of the above

21. 20. Which of the following is the interface between a user and an ATM switch ? A)UNI B)NNI C)NNN D)None of the above

22. 21. Which of the following is the interface between two ATM switches ? A)UNI B)NNI C)NNN D)none of the above

23. 22. Which of the following helps to accomplish the connection between two end pints in ATM ? A)TPs B)VPs C)VCs D)all of the above

24. 23. Which of the following layer accepts transmissions from upper-layer services and maps them into ATM cell in ATM ? A)physical B)ATM C)AAL D)none of the above

25. 24. Which of the following layer provides routing, traffic management, switching, and multiplexing services in ATM ? A)physical B)ATM C)AAL D)none of the above

26. 25. Which of the following layer defines the transmission medium, bit transmission, encoding, and electrical-to-optical transformation in ATM ? A)physical B)ATM layer C)AAL D)none of the above

27. 26. How many sub layers does the AAL can be divided into ? A)two B)three C)four D)none of the above

28. 27. Which of the following in ATM, is for constant- bit-rate data ? A)ATM layer B)ATM Adaptation Layer 1 C)Physical layer D)x.25

29. 28. Which of the following in ATM, is for short packets ? A)Frame mode bearer services B)ATM adaptation layer 2 C)Virtual path D)Logical link

30. 29. Which of the following in ATM, is for conventional packet switching (virtual-circuit approach or datagram approach) ? A)Management Plane B)User Plane C)AAL3/4 D)None of the above

31. 30. Which of the following in ATM, is for packets requiring no sequencing and no error control mechanism ? A)AAL B) Frame Relay C)Packet D)ATM Adaptation Layer 5

32. 31. Which of the following technology can be adapted for use in a LAN (ATM LAN) ? A)X.25 B)Frame Relay C)ATM D)none of the above

33. 32. In which sort of ATM LAN, an ATM switch can connects stations ? A)pure B)legacy C)mixed architecture D)none of the above

34. 33. What will be the throughput in a network, when the load is below the capacity of the network ? A)increases sharply B)increases proportionally with the load C)declines sharply D)declines proportionally with the load

35. 34. In which of the following, we try to avoid traffic congestion ? A)congestion control B)quality of service C)either (a) or (b) D)both (a) and (b)

36. 35. What is the length of the VPI of an UNI ? A)8 B)13 C)20 D)24

37. 36. In which of the following, we try to create an appropriate environment for the traffic ? A)controls B)descriptors C)values D)none of the above

38. 37. Which of the following defines the maximum data rate of the traffic ? A)peak data rate B)maximum burst size C)effective bandwidth D)none of the above

39. 38. Which of the following normally refers to the maximum length of time the traffic is generated at the peak rate ? A)peak data rate B)maximum burst size C)effective bandwidth D)none of the above

40. 39. Which of the following is a function of three values: average data rate, peak data rate, and maximum burst size ? A)peak data rate B)maximum burst size C)effective bandwidth D)none of the above

41. 40. Which of the following traffic model has a data rate that does not change ? A)constant bit rate B)variable bit rate C)bursty D)none of the above

42. 41. What will be the delay in a network, when the load reaches the network capacity ? A)increases sharply B)decreases sharply C)remains constant D)cannot be predicted

43. 42. In which of the following traffic model, the data rate changes suddenly in a very short time ? A)Queueing policy B)Discard C)bursty D)none of the above

44. 43.Which of the following happens in any system that involves waiting ? A)Congestion B)Jamming C)Error D)none of the above

45. 44.Which of the following does the routers and switches have, which in turn leads to the Congestion in a network or internetwork ? A)tables B)queues C)crosspoints D)none of the above

46. 45. What will be the delay in a network, when the load is much less than the capacity of the network ? A)at a maximum B)at a minimum C)constant D)none of the above

47. 46. In which of the following traffic model, the rate of the data flow changes in time, with smooth changes instead of sudden and sharp ? A)CBR B)VBR C)bursty D)none of the above

48. 47 In which sort of ATM LAN, the backbone that connects traditional LANs can use ATM technology ? A)pure B)legacy C)mixed architecture D)none of the above

49. 48.What will be the throughput in a network, after the load reaches the capacity ? A)increases sharply B)increases proportionally with the load C)declines sharply D)declines proportionally with the load

50. 49. Which of the following is congestion control technique? A)Virtual Channel B)Discard policy C)Queueing D)None of the above

51. 50. In which of the following congestion control, mechanisms are used to alleviate congestion after it happens ? A)open-loop B)closed-loop C)either (a) or (b) D)neither (a) nor (b)