CS2060 HIGH SPEED NETWORKS QUIZ 1. 1. Which among the following is a virtual- circuit wide-area network that was designed in response to demands for a.

CS2060 HIGH SPEED NETWORKSQUIZ 1

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.25b)Frame Relayc) ATMd)none of the above

2.Which of the following does frame relay provides ?a)PVCsb)SVCsc) either (a) or (b)d)neither (a) nor (b)

3 How VCIs in Frame Relay are called so ?

A) Logical LinkB) Frame C) DLCIsD)none of the above

4 Which 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

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 circuitB)Semi permanent virtual circuitsC)Both (a) and (b)D)None of the above

6 Which of the following does Frame Relay has ?

A)only the physical layer B)only the data linkC)the physical and data link layersD)the physical, data link, and network layers

7 Which of the following control does the frame relay used protocol provides at the data link layer?

A)flowB)errorC)either (a) or (b)D)neither (a) nor (b)

8 Which of the following bytes is the address limit in the Frame Relay ?

A)only 2B)2 to 3C)2 to 4D)none of the above

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

10. Which of the following devices does Frame Relay use, in order to handle frames arriving from other protocols ?

A)DEMUXB)Frame Relay Access DeviceC)MUXD)none of the above

11. Which of the following option does Frame Relay networks offer, that sends voice through the network ?

A)Voice Over Frame RelayB)FRADC)IdentifierD)All of the above

12. Which of the following is the cell relay protocol designed by the corresponding Forum and adopted by the ITU-T ?

A)X.25B)Frame RelayC)ATMD)none of the above

13. Which of the following is defined as a small, fixed-size block of information ?

A)frameB)packetC)cellD)none of the above

14. Which of the following defines a virtual connection in ATM ?

A)VPIB)VCIC)DLCID)a combination of (a) and (b)

15. Which of the following denotes the layers defined in the ATM standard ?

A)twoB)threeC)fourD)five

16. In which of the following , we try to avoid traffic congestion ?

A)congestion controlB)quality of serviceC)either (a) or (b)D)both (a) and (b)

17. What is the length of the VPI of a NNI ?

A)8B)12C)16D)24

18. Which of the following number of bytes does the ATM data packet is composed of ?

A)40B)50C)52D)53

19. Which of the following eliminates the varying delay times associated with different-size packets ?

A)X.25B)Frame RelayC)ATMD)all of the above

20. Which of the following is the interface between a user and an ATM switch ?

A)UNIB)NNIC)NNND)None of the above

21. Which of the following is the interface between two ATM switches ?

A)UNIB)NNIC)NNND)none of the above

22. Which of the following helps to accomplish the connection between two end pints in ATM ?

A)TPsB)VPsC)VCsD)all of the above

23. Which of the following layer accepts transmissions from upper-layer services and maps them into ATM cell in ATM ?

A)physicalB)ATMC)AALD)none of the above

24. Which of the following layer provides routing, traffic management, switching, and multiplexing services in ATM ?

A)physicalB)ATMC)AALD)none of the above

25. Which of the following layer defines the transmission medium, bit transmission, encoding, and electrical-to-optical transformation in ATM ?

A)physicalB)ATM layerC)AALD)none of the above

26. How many sub layers does the AAL can be divided into ?

A)twoB)threeC)fourD)none of the above

27. Which of the following in ATM, is for constant-bit-rate data ?

A)ATM layerB)ATM Adaptation Layer 1C)Physical layerD)x.25

28. Which of the following in ATM , is for short packets ?

A)Frame mode bearer servicesB)ATM adaptation layer 2C)Virtual pathD)Logical link

29. Which of the following in ATM, is for conventional packet switching (virtual-circuit approach or datagram approach) ?

A)Management PlaneB)User PlaneC)AAL3/4D)None of the above

30. Which of the following in ATM, is for packets requiring no sequencing and no error control mechanism ?

A)AALB) Frame RelayC)PacketD)ATM Adaptation Layer 5

31. Which of the following technology can be adapted for use in a LAN (ATM LAN) ?

A)X.25B)Frame RelayC)ATMD)none of the above

32. In which sort of ATM LAN, an ATM switch can connects stations ?

A)pureB)legacyC)mixed architectureD)none of the above

33. What will be the throughput in a network, when the load is below the capacity of the network ?

A)increases sharplyB)increases proportionally with the loadC)declines sharplyD)declines proportionally with the load

34. In which of the following , we try to avoid traffic congestion ?

A)congestion controlB)quality of serviceC)either (a) or (b)D)both (a) and (b)

35. What is the length of the VPI of an UNI ?

A)8B)13C)20D)24

36. In which of the following , we try to create an appropriate environment for the traffic ?

A)controlsB)descriptorsC)valuesD)none of the above

37. Which of the following defines the maximum data rate of the traffic ?

A)peak data rateB)maximum burst sizeC)effective bandwidthD)none of the above

38. Which of the following normally refers to the maximum length of time the traffic is generated at the peak rate ?

A)peak data rateB)maximum burst sizeC)effective bandwidthD)none of the above

39. Which of the following is a function of three values: average data rate, peak data rate, and maximum burst size ?

A)peak data rateB)maximum burst sizeC)effective bandwidthD)none of the above

40. Which of the following traffic model has a data rate that does not change ?

A)constant bit rateB)variable bit rateC)burstyD)none of the above

41. What will be the delay in a network, when the load reaches the network capacity ?

A)increases sharplyB)decreases sharplyC)remains constantD)cannot be predicted

42. In which of the following traffic model, the data rate changes suddenly in a very short time ?

A)Queueing policyB)DiscardC)burstyD)none of the above

43.Which of the following happens in any system that involves waiting ?

A)CongestionB)JammingC)ErrorD)none of the above

44.Which of the following does the routers and switches have , which in turn leads to the Congestion in a network or internetwork ?

A)tablesB)queuesC)crosspointsD)none of the above

45. What will be the delay in a network, when the load is much less than the capacity of the network ?

A)at a maximumB)at a minimumC)constantD)none of the above

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)CBRB)VBRC)burstyD)none of the above

47 In which sort of ATM LAN, the backbone that connects traditional LANs can use ATM technology ?

A)pureB)legacyC)mixed architectureD)none of the above

48.What will be the throughput in a network, after the load reaches the capacity ?

A)increases sharplyB)increases proportionally with the loadC)declines sharplyD)declines proportionally with the load

49. Which of the following is congestion control technique?

A) Virtual ChannelB) Discard policyC) QueueingD) None of the above

50. In which of the following congestion control, mechanisms are used to alleviate congestion after it happens ?

A) open-loopB) closed-loopC) either (a) or (b)D) neither (a) nor (b)