When different routes are used for client-side 1 + 1 protection, the working wavelength and protection wavelength cannot use the same wavelength.

• A.True
• B.False

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What are the basic principles of MSTP device fault location? (Multiple choice)

• A.Low speed first, then high speed
• B.Advanced first, then low level
• C.External first, then transfer
• D.Network first, then network element

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As with the STP device, the NG WDM device can practice the network element configuration on the network through pre-configured method.

• A.TRUE
• B.FALSE

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Which of the following ROADN nodes are configured correct? (Multiple choice)

• A.WSM9+RDU9
• B.WSMD9
• C.WSD9+RMU9
• D.WSIM9+WSD9

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Which of the following is the data that needs to be collected and saved in the event of a failure? (Multiple Choice)

• A.Running status data of the NE and the board
• B.Configuration data of the NE and the board
• C.Equipment alarms and performance events
• D.Operation log of the network management

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