Huawei H31-311_V2.5 Actual Free Exam Questions & Community Discussion
Which of the following layers of overhead belong to the electrical layer overhead of OTN? (Multiple choice)
Correct Answer: A,B,C
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Which of the following descriptions of the GFP encapsulation protocol is wrong?
Correct Answer: A
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The LAN physical layer is often used for the interconnection of routers and switches. Although it is called a LAN, if a 10GBase-LR or -ER optical module is used, the transmission distance can reach 80 kilometers.
Correct Answer: A
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Which of the following correctly describes the order in which the signal flow between the SDH interface and the cross-unit passes through the module units?
Correct Answer: D
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K1 and K2 bytes can transmit APS switching signaling and can also indicate the failure of the signal in the multiplexing segment.
Correct Answer: A
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PDM uses a polarization beam splitter to split the laser into two perpendicular directions: x and y.
Correct Answer: A
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The frame structure of ODU4 is four times that of ODU1.
Correct Answer: B
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Which of the following statements about the EFS4 circuit board are correct? (Multiple choice)
Correct Answer: A,D
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Which of the following VC-4J1 bytes is indicated by the AU pointer of the current frame?
Correct Answer: A
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Pointer adjustment is related to which of the following?
Correct Answer: B
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When the J1 byte does not match, () alarm is reported and the service may be interrupted.
Correct Answer: B
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The rate of STM-0 is 51.84Mbit/s; (STM-0 is used for digital microwave).
Correct Answer: A
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The standard Ethernet frame length should be no less than 64 bytes, which is determined by the working mechanism of () and collision detection.
Correct Answer:
Carrier Sense Multiple Access
The AU pointer indicates the position of the J1 byte of the VC-4 in this frame.
Correct Answer: A
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