The U2000 network management system supports multiple external interfaces. Which of the following interfaces can be used when interconnecting with other manufacturers' equipment? (Multiple choice)

• A.MML
• B.CORBA
• C.SNMP
• D.QX

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The cascading methods for mapping Ethernet services to SDH include adjacent cascading and virtual cascading.

• A.True
• B.False

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For the hybrid transmission system with dispersion compensation, the requirements for the optical power entering the fiber should be consistent with the requirements of the original non-coherent system.

• A.True
• B.False

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There are many factors affecting the transmission distance in NG WDM system, which of the following will not affect the transmission distance?

• A.Optical line dispersion
• B.Optical line loss
• C.Fiber nonlinear effect
• D.OSC independent monitoring channel

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When configuring LMSP, there are two switching modes: single-ended switching and double-ended switching. Single-ended switching does not require protection protocols to be enabled.

• A.True
• B.False

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