Which of the following statements about the MSP ring is correct? (Multiple choice).

• A.When multiple protection subnets occupy the same port on the same board, "resource sharing" must be reached.
• B.The number of nodes on the MSP ring cannot exceed 16. .
• C.Create a protection sub and select only the SDH network element. Do not select REG or WDM network elements.
• D.is assigned by VC4 means that different VCs4 are assigned to different protection subnets to implement MsPs only in certain channels

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Which of the following statements about the OTM-n .m and OTMnr .m for OTN are incorrect?

• A.n represents the number of wavelengths carried by the maximum capacity
• B.r represents OTM., which does not have OSC capabilities
• C.OTM-nr .m with OSC signal is OTM-n.m.
• D.m indicates the rate. The value can be 1, 2, or 3. .

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The number of bit error blocks on each VC4 channel is detected by B3 on the receiving side. At the same time, the information is sent back to the sender via Q, and HP-REI and HP-FEBBE report on the sender.

• A.J(bt-4)
• B.G1 (b5-b8）
• C.K3 (b1-b4)
• D.G1 (b1-b4)

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Which of the following statements about the U2000 license is incorrect?

• A.The U2000 license file xxxxxxx is named .dat format
• B.Each license file corresponds to the device serial number (ESN) of one U2000 computer, so it can only be used on the corresponding computer.
• C.Official U2000 licenses vary by operating system platform. You must apply for a U2000 license based on your specific operating system. (Correct answer"
• D.Do not modify the license file. Otherwise, the license file will fail

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An unprotected chain consists of four net elements; ME1, NE2, NE3 and NE4.
Create an end-to-end VC4 path NE1-NE4 and add NE5 between NE2 and NE3 for capacity expansion.
The original configuration remains unchanged and no services are configured on the NE5.
In this case, the unprotected chain becomes NE1-NE2-NE5NE3-NE4, how many VC4 paths can be searched?

• A.2
• B.0
• C.3
• D.1

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