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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Which of the following description of the PWE3 technology are correct? (Multiple choice)

• A.PRE3 technology provides ATM, Ethernet, and TDM services with end-to-end virtual link emulation at the PS network boundary.
• B.PWE3 technology belongs to the second layer VLL solution
• C.The internal data services carried by PWE3 are visible to the core network.
• D.For PE3 emulation of Ethernet services, PW control words can be manually configured on the PE.

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In the Colored&Directioned scenario of the 4D ROADM, if you want to implement local service scheduling in four directions, how many sets of M40V+D40 are needed?

• A.4
• B.1
• C.9
• D.2

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When the NNI port attribute is configured on the same subnet, the IP addresses of the ports on different links can be duplicated.

• A.FALSE
• B.TRUE

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Which of the following tools may Board replacement use? (Multiple choice)

• A.Anti-static gloves
• B.Fiber extractor
• C.Shielding bag
• D.U2000

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