Huawei Huawei Certifications H31-311 Questions & Answers

• Question 131:

  When the LCAS function is used/ which of the following overhead bytes are used to transmit control information? (Multiple Choice)

  A. M1

  B. H4

  C. K2

  D. K4

  Correct Answer: BD

• Question 132:

  The pointer is used for alignment and indicates the start position of VC-n in the corresponding AU or TU frame. In this way, the receive end can correctly remove the corresponding VC from the STM-N, and then split the VC and C encapsulation to separate low-rate signals, such as PDH. That is, low-rate tributary signals can be directly dropped from the STM-N signal.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 133:

  Which of the following statements about the MST functional module are correct? (Multiple Choice)

  A. The MST is both the source and sink of the MS.

  B. The MST implements the BIP-8 statistics calculation of the B2 byte.

  C. The MST returns bit error information, but not the specific number of bit errors.

  D. The MST provides the E2 orderwire channel.

  Correct Answer: AD

• Question 134:

  Which of the following can be configured as the monitoring time of NE performance events?

  A. Later than the current time

  B. Same as the current time of the NE

  C. Earlier than the current time

  D. Any time

  Correct Answer: A

• Question 135:

  The frame structure of 0DU4 is four times that of ODU1.

  A. TRUE

  B. FALSE

  Correct Answer: B

• Question 136:

  The 1310 nm and 1550 nm transmission windows are low-loss windows. In DWDM systems, only the 1550 nm transmission window is used. Which of the following is the major cause?

  A. The working wavelength flatness area of the EDFA is included in this window.

  B. The non-linear effect of the 1550 nm wavelength area is small.

  C. The 1550 nm wavelength area is applicable to long-haul transmission.

  D. None of the above

  Correct Answer: A

• Question 137:

  Which of the following effects is used by the Raman amplifier?

  A. Self-phase modulation (SPM)

  B. Dispersion

  C. Raman scattering

  D. Four-wave mixing (FWM)

  Correct Answer: C

• Question 138:

  The clock unit can access an external clock source as the timing signal source of the system only through the external clock interface. In addition, it can output the processed clock and provide the clock source for other devices that require timing.

  A. TRUE

  B. FALSE

  Correct Answer: B

• Question 139:

  Which of the following is the multiplexing mode of SDH?

  A. Flexible mapping

  B. Asynchronous multiplexing

  C. Flexible mapping and asynchronous multiplexing

  D. Flexible mapping and synchronous multiplexing

  Correct Answer: D

• Question 140:

  Which of the following statements about the optical-layer interfaces OTM-n.m and OTM-nr.m of OTN is incorrect?

  A. n indicates the number of wavelengths carried by the maximum capacity.

  B. m indicates the rate. The value can be 1, 2, or 3.

  C. r indicates OTM without the OSC function.

  D. OTM-nr.m with OSC signals is OTM-n.m.

  Correct Answer: B