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光信道层（Optical channel layer）：为各种客户信号（如SDHSTM-N、cell-basedATM、GE等）提供（）。
- A、透明
- B、电传输通道
- C、光传输通道
- D、半透明
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『____』层向MAC层提供传输信道，传输信道的作用是描述信息是如何通过无线接口传输的。(『____』layer provides transmission channel to the MAC layer.)
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MAC提供不同的逻辑信道给层2的『____』子层，逻辑信道的作用是表征传输的消息类型。(The MAC layer provides different logical channels to 『____』sub-layer.)
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在层属性(Layer Properties)面版中,可以对层的类型进行设置,下面哪个答案所有的内容都属于层类型。 ()
A. Normal;Channel;Mask„„B. Normal;Mask;Folder„„C. Guided;Masked;Grope„„D. Masked;Folder;Outline„„
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接入信道中,导频信道的开环输出功率为mean pilot channel output power,数据信道的开环输出功率为meandatachanneloutputpower,则接入信导前缀中的导频信道输出功率为()
A.mean pilot channel output power-mean data channel output powerB.mean pilot channel output power+mean data channel output powerC.mean pilot channel output power-0.5*mean data channel output powerD.mean pilot channel output power+0.5*mean data channel output power
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MS需要同网络建立通信时，通过（）信道向网络发送一个报文来向系统申请一条信令信道。此报文称作（）。A、BCCH；Channel RequestB、RACH；Channel RequestC、SDCCH；Channel RequiredD、SACCH；Channel Required
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光信道层（Opticalchannellayer）：为各种客户信号（如SDHSTM-N、cell-basedATM、GE等）提供透明的（）的光传输通道。A、端到端B、点到点C、边到边D、节点处
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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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光传送段层（Optical transmission section layer network）：为光信号在不同类型的（）（G652、G653、G655光纤等）上提供（）功能。A、光媒质B、介质C、载体D、传输
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接入信道中，导频信道的开环输出功率为mean pilot channel output power，数据信道的开环输出功率为meandatachanneloutputpower，则接入信导前缀中的导频信道输出功率为（）A、mean pilot channel output power-mean data channel output powerB、mean pilot channel output power+mean data channel output powerC、mean pilot channel output power-0.5*mean data channel output powerD、mean pilot channel output power+0.5*mean data channel output power
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Which command is used to enable EtherChannel hashing for Layer 3 IP and Layer 4 port-based CEF？（）A、mpls ip cefB、port-channel ip cefC、mpls ip port-channel cefD、port-channel load balanceE、mpls ip load-balanceF、ip cef EtherChannel channel-id XOR L4G、ip cef connection exchange
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多选题光传送段层（Optical transmission section layer network）：为光信号在不同类型的（）（G652、G653、G655光纤等）上提供（）功能。A光媒质B介质C载体D传输
考题
单选题光信道层（Opticalchannellayer）：为各种客户信号（如SDHSTM-N、cell-basedATM、GE等）提供透明的（）的光传输通道。A
端到端B
点到点C
边到边D
节点处
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判断题光传送段层（Optical transmission section layer network）：为光信号在不同类型的光媒质（G652、G653、G655光纤等）上提供传输功能。A
对B
错
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单选题Which command is used to enable EtherChannel hashing for Layer 3 IP and Layer 4 port-based CEF？（）A
mpls ip cefB
port-channel ip cefC
mpls ip port-channel cefD
port-channel load balanceE
mpls ip load-balanceF
ip cef EtherChannel channel-id XOR L4G
ip cef connection exchange
考题
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
考题
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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