cs2060 high speed networks quiz 1. 1. which among the following is a virtual- circuit wide-area...
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2.Which of the following does frame relay provides ? a)PVCs b)SVCs c)either (a) or (b) d)neither (a) nor (b)TRANSCRIPT
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CS2060 HIGH SPEED NETWORKSQUIZ 1
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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
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2.Which of the following does frame relay provides ?a)PVCsb)SVCsc) either (a) or (b)d)neither (a) nor (b)
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3 How VCIs in Frame Relay are called so ?
A) Logical LinkB) Frame C) DLCIsD)none of the above
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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
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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
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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
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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)
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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
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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
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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
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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
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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
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13. Which of the following is defined as a small, fixed-size block of information ?
A)frameB)packetC)cellD)none of the above
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14. Which of the following defines a virtual connection in ATM ?
A)VPIB)VCIC)DLCID)a combination of (a) and (b)
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15. Which of the following denotes the layers defined in the ATM standard ?
A)twoB)threeC)fourD)five
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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)
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17. What is the length of the VPI of a NNI ?
A)8B)12C)16D)24
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18. Which of the following number of bytes does the ATM data packet is composed of ?
A)40B)50C)52D)53
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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
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20. Which of the following is the interface between a user and an ATM switch ?
A)UNIB)NNIC)NNND)None of the above
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21. Which of the following is the interface between two ATM switches ?
A)UNIB)NNIC)NNND)none of the above
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22. Which of the following helps to accomplish the connection between two end pints in ATM ?
A)TPsB)VPsC)VCsD)all of the above
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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
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24. Which of the following layer provides routing, traffic management, switching, and multiplexing services in ATM ?
A)physicalB)ATMC)AALD)none of the above
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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
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26. How many sub layers does the AAL can be divided into ?
A)twoB)threeC)fourD)none of the above
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27. Which of the following in ATM, is for constant-bit-rate data ?
A)ATM layerB)ATM Adaptation Layer 1C)Physical layerD)x.25
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28. Which of the following in ATM , is for short packets ?
A)Frame mode bearer servicesB)ATM adaptation layer 2C)Virtual pathD)Logical link
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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
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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
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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
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32. In which sort of ATM LAN, an ATM switch can connects stations ?
A)pureB)legacyC)mixed architectureD)none of the above
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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
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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)
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35. What is the length of the VPI of an UNI ?
A)8B)13C)20D)24
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36. In which of the following , we try to create an appropriate environment for the traffic ?
A)controlsB)descriptorsC)valuesD)none of the above
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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
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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
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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
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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
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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
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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
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43.Which of the following happens in any system that involves waiting ?
A)CongestionB)JammingC)ErrorD)none of the above
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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
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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
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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
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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
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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
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49. Which of the following is congestion control technique?
A) Virtual ChannelB) Discard policyC) QueueingD) None of the above
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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)