Huawei Huawei Certifications H31-311 Questions & Answers

• Question 171:

  Which of the following statements about clock sources is incorrect?

  A. Internal clock sources have the lowest priority because of their low precision.

  B. Generally, tributary clocks are not used as the clock sources of devices.

  C. The same SSM protocol is selected for all NEs in a clock protection subnet.

  D. If the standard SSM protocol is enabled, you need to set the clock source ID.

  Correct Answer: D

• Question 172:

  Which of the following operations may interrupt NE services? (Multiple Choice)

  A. Searching for protection subnets

  B. Searching for trails

  C. Deactivating trails

  D. Downloading NE data

  Correct Answer: CD

• Question 173:

  The Erbium Doped Fiber Amplifier (EDFA) is a key component of the new-generation optical communication system. Which of the following are the features of the EDFA? (Multiple Choice)

  A. High gain

  B. High output power

  C. Amplification of any wavelengths

  D. Low noise index

  Correct Answer: ABD

• Question 174:

  The receive end performs BIP-8 check for the unscrambled STM-16 frame. If the BIP-8 check result XOR the value of the B1 byte contained in the following STM-16 frame is 10001100, it indicates that () bit error blocks exist in the STM-16 frame.

  A. 5

  B. 3

  C. 6

  D. Unclear

  Correct Answer: B

• Question 175:

  The EPL service exclusively uses bandwidth on the line, which is highly secure. It is applicable to the private line application of VIP customers.

  A. TRUE

  B. FALSE

  Correct Answer: A