The network element automatically backs up the network element database to the FLASH database every 30 minutes by default.

• A.TRUE
• B.FALSE

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Generally, in the NG WD system, the full-wave fiber input power is generally less than 20dBm. What is the main reason?

• A.In order to extend the life of the laser of the board
• B.To avoid nonlinear effects
• C.In order to maintain the personal safety of personnel
• D.In order to protect the cable

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Which of the following statements about the latency of a storage and forwarding device is false?

• A.Reflects the performance of network devices. Generally, it is not compared with the bit forwarding device.
• B.The last bit of the data frame enters the device and starts timing.
• C.The first bit of the data frame enters the device and starts timing.
• D.The first bit of the data frame appears at the output port of the device and stops timing.

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The following description of the ASDN software structure, the correct ones are: (Multiple Choice)

• A.Intelligent optical network consists of three planes
• B.The transmission plane refers to the traditional transmission network.
• C.Intelligent software main application management plane
• D.The management plane mainly refers to upper management such as network management.

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Which of the following is not included in the OOS overhead?

• A.Optical channel transmission unit overhead
• B.Optical channel overhead
• C.Optical multiplex section overhead
• D.Optical transmission section overhead

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