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Home Huawei H31-341_V2.5

Huawei H31-341_V2.5 Exam Practice Questions (P. 2)

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Question #6
Which of the following statements about QPSK modulation are false?
  1. A
    In QPSK, one phase represents two bits, which is also equivalent to splitting a data stream into two, reducing the data rate by half.
  2. B
    QPSK assigns two possible phase values in the optical field. This decreases the baud rate of optical signals by half while keeping the line rate unchanged.
  3. C
    ePDM-QPSK is a preferred modulation format for 100G WDM transmission.
  4. D
    QPSK modulation can increase the spectral bandwidth, reduce the OSNR requirement and non-linear effects in optical fibers, and improve the dispersion tolerance and PMD tolerance.

Correct Answer: B ?️

Question #7
The OptiXtrans DC908 chassis can be a DC chassis or an AC chassis.
  1. A
    TRUE
  2. B
    FALSE

Correct Answer: A ?️

Question #8
Which of the following statements about a TNG2WSMD09 board are true? (Choose all that apply.)
  1. A
    It implements optical-layer service grooming for multiple wavelengths.
  2. B
    It is a reconfigurable optical add/drop multiplexing unit.
  3. C
    It is a 9-port wavelength selective multiplexer/demultiplexer board (Super C band).
  4. D
    It supports optical power adjustment and online optical power detection.

Correct Answer: CD ?️

Question #9
Which of the following statements about optical multiplexer and demultiplexer boards is false?
  1. A
    TNG2D6001 demultiplexes one multiplexed-wavelength signal into a maximum of 60 even-wavelength optical signals.
  2. B
    TNG2M60V is a 60-channel multiplexer board with VOA (Super C band).
  3. C
    TNG2UM40 is a 40-channel multiplexer board (Super C band).
  4. D
    The UITL board multiplexes and demultiplexes signals with 50 GHz spacing and signals with 100 GHz spacing.

Correct Answer: B ?️

Question #10
WDM systems generally use DCMs to compensate for chromatic dispersion. Which of the following statements about DCM-based dispersion compensation is false?
  1. A
    If the DCM configuration is incorrect, the system OSNR will deteriorate.
  2. B
    Compared with line transmission optical fibers, DCMs are prone to non-linear effects. Therefore, the incident optical power of the DCMs must be controlled.
  3. C
    For a 10G system with a fiber length shorter than 400 km, G.652-specific DCMs can be used to compensate for dispersion in G.655 (Leaf) optical fibers.
  4. D
    If the DCM configuration is false, the receive-end performance will deteriorate.

Correct Answer: C ?️

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