Which of the following statements about MPLS is wrong?

• A.In the packet transport field, the MPLS technology is mainly used to construct tunnels to carry various types of services (for example, TDM, ATM, and Ethernet) transmitted by PWE3 to implement end-to-end transmission of services on packet networks.
• B.MPLS is not a service or application. It is a standard routing and switching platform that supports various upper-layer protocols and services.
• C.MPLS has two planes: control plane and forwarding plane. The control plane is connection-oriented, the forwarding plane is connectionless.
• D.MPLS packet forwarding is based on labels.

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For an MSTP device, the service layer path is a path existing on the network management side, and the client layer path is a path existing on the network element side.

• A.FALSE
• B.TRUE

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What common methods for MSTP device fault location can be summarized as?

• A.One board change, two loopbacks, three analysis.
• B.One analysis, two board change, three loopbacks.
• C.One analysis, two loopbacks, three board change.
• D.One loopbacks, two board change, three analysis.

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Which of the following statement is correct?

• A.The optical layer path and the electrical layer path are independent. It is not necessary to delete the electrical layer path when deleting the optical layer path.
• B.When the OCh path exists, you can directly create a client path. The NMS automatically creates an ODUk path.
• C.The optical layer path must be deleted first when the electrical layer path is removed.
• D.Deactivation will delete the configuration of the U2000, which has no impact on the device side services.

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Which of the following are not part of the 400G originating modulation technology?

• A.Multi-carrier generation and multiplexing
• B.Advanced oDSP algorithm
• C.FDDM/Nyquist spectrum compression technology
• D.High-order modulation (xQAM)

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