Since the nonlinear effect is generated, its influence on the service signal cannot be repaired. Therefore, the treatment of the nonlinear effect of the existing network is to avoid the occurrence of nonlinear effects.

• A.FALSE
• B.TRUE

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Which of the following ROADM boards have WSS optical modules? (Multiple Choice)

• A.WSM9
• B.WSD9
• C.WSMD9
• D.RDU9

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The following description of the use of synchronous methods to create fiber optics, which is wrong?

• A.If there is a fiber that is not created on the U2000 or a fiber that is not created on the network element, you need to synchronize or create it.
• B.The existence of a conflicting fiber does not affect the configuration of the path, so it can be ignored.
• C.The fiber exists on the network management side and the network element side, and the fiber with the same information is not required to be created.
• D.Collision fiber refers to the fiber that is configured on the network element side and is inconsistent with the configuration on the network management side.

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The service types supported by the PND2 board used by the OSN 8800 are: (Multiple choice)

• A.EPLAN
• B.VPWS
• C.EPL
• D.VPLS

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Two PIU/APIU boards use the hot backup mode to supply power to the system on the OSN 1800 device, when a PIU/APIU board fails, the system can still work normally.

• A.TRUE
• B.FALSE

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