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何为optical review tool?
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无源光网络由哪些部分构成?()
A.OLT（Optical Line Terminal）－光线路终端B.ONU（Optical NetworkUnit）－光网络单元C.ONT（Optical Network Terminal）－光网络终端D.ODN（Optical Distribution Network）－光分配网
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In performing an impact analysis, the most effective tool to ensure all risks are identified on large projects is the:A Work breakdown structureB milestone review and schedule techniqueC cost/schedule control systemD planning programming budget systemE program and evaluation review technique
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178 In performing an impact analysis, the most effective tool to ensure all risks are identified on large projects is the:A. Work breakdown structureB. milestone review and schedule techniqueC. cost/schedule control systemD. planning programming budget systemE. program and evaluation review technique
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What three in combination are factors that can cause four－wave mixing in fiber－optic cables? ()(Choose three.)
A. low optical powerB. high optical powerC. few optical channelsD. many optical channelsE. low chromatic dispersionF. high chromatic dispersionG. too much power differential in the optical channels
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在通信专业中，PON的英文全称是（ ），衰减英文通常翻译为（ ） 。A．Private Optical Network B．Passive Optical Network C．Private Optical Node D．Protected Optical Node A．attenuation B．loss C．fading D．decline
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检索式“review in PT”的含义是：（）A、检出所有综述文献B、检出所有题目中出现review的文献C、检出所有刊名中出现review的文献D、检出所有主题词字段中出现review的文献
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In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（）A、the signal to noise of the current optical amplifierB、the signal to noise of the previous amplifier or sourceC、the signal to noise introduced by the optical multiplexerD、the accumulated noise to signal ratio of the optical channel
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What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)A、low optical powerB、high optical powerC、few optical channelsD、many optical channelsE、low chromatic dispersionF、high chromatic dispersionG、too much power differential in the optical channels
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A customer reports the optical drive is no longer responding. Which of the following questionsshould be asked FIRST?（）A、“Did you log in with an administrator account?”B、“Have you been to any inappropriate websites?”C、“What have you changed since the optical drive worked properly?”D、“What has changed since the optical drive worked properly?”
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OWM的英文全称是（）A、Optical Wavelength MultiplexB、Optical wavelength MonitorC、Optical wavelength MemoryD、All are right
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无源光网络由哪些部分构成？（）A、OLT（Optical Line Terminal）－光线路终端B、ONU（Optical NetworkUnit）－光网络单元C、ONT（Optical Network Terminal）－光网络终端D、ODN（Optical Distribution Network）－光分配网
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What two descriptions best define DWDM？ （）A、 a WDM system that is compatible with EDFA technologyB、 an optical technology for transmitting up to 16 channels over multiple fiber strandsC、 an optical technology for transmitting up to 32 channels over multiple fiber strandsD、 a technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDME、 a technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM
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Which device creates an OEO conversion？ （）A、 amplifierB、 attenuatorC、 regeneratorD、 light emitterE、 optical switchF、 optical receiverG、 fiber-optic cable
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SONET全称为（）A、synchronous optimized networkB、synchronous optical networkC、synthesis optimized networkD、synthesis optical network
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单选题When planning for a logically partitioned system，which of the following should be used as part of a review to ensure that each partition has the required resources？ （）A
Use the Workload Estimator capacity planning tool.B
Use prtconf output from legacy systems.C
Use the LPAR Validation Tool.D
Use Performance Management Services.
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单选题In the OSNR model for EDFA amplifiers， SNR OUT = 1/（1/SNR IN + FhvB/P IN ）， what does SNR IN represent？（）A
the signal to noise of the current optical amplifierB
the signal to noise of the previous amplifier or sourceC
the signal to noise introduced by the optical multiplexerD
the accumulated noise to signal ratio of the optical channel
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多选题What three in combination are factors that can cause four-wave mixing in fiber-optic cables？（）Alow optical poweBhigh optical powerCfew optical channelsDmany optical channelsElow chromatic dispersionFhigh chromatic dispersionGtoo much power differential in the optical channels
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多选题What two descriptions best define DWDM？ （）Aa WDM system that is compatible with EDFA technologyBan optical technology for transmitting up to 16 channels over multiple fiber strandsCan optical technology for transmitting up to 32 channels over multiple fiber strandsDa technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDMEa technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM
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单选题In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（）A
the signal to noise of the current optical amplifierB
the signal to noise of the previous amplifier or sourceC
the signal to noise introduced by the optical multiplexerD
the accumulated noise to signal ratio of the optical channel
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多选题What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)Alow optical powerBhigh optical powerCfew optical channelsDmany optical channelsElow chromatic dispersionFhigh chromatic dispersionGtoo much power differential in the optical channels
考题
单选题Which device creates an OEO conversion？ （）A
amplifierB
attenuatorC
regeneratorD
light emitterE
optical switchF
optical receiverG
fiber-optic cable
考题
问答题Review tool 有哪几种？
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