Download HCNA-Transmission.H31-311.NewDumps.2018-07-20.175q.vcex

Vendor: Huawei
Exam Code: H31-311
Exam Name: HCNA-Transmission
Date: Jul 20, 2018
File Size: 103 KB
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Demo Questions

Question 1
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.
  1. 5
  2. 3
  3. 6
  4. Unclear
Correct answer: B
Question 2
The EPL service exclusively uses bandwidth on the line, which is highly secure. It is applicable to the private line application of VIP customers.
  1. TRUE
  2. FALSE
Correct answer: A
Question 3
Which of the following statements about clock sources is incorrect?
  1. Internal clock sources have the lowest priority because of their low precision.
  2. Generally, tributary clocks are not used as the clock sources of devices.
  3. The same SSM protocol is selected for all NEs in a clock protection subnet.
  4. If the standard SSM protocol is enabled, you need to set the clock source ID.
Correct answer: D
Question 4
Which of the following operations may interrupt NE services? (Multiple Choice)
  1. Searching for protection subnets
  2. Searching for trails
  3. Deactivating trails
  4. Downloading NE data
Correct answer: CD
Question 5
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)
  1. High gain 
  2. High output power
  3. Amplification of any wavelengths
  4. Low noise index
Correct answer: ABD
Question 6
When the transmit end detects that the b6-b8 of the K2 byte is 110, it indicates that the () alarm is reported at the transmit end.
  1. MS-AIS
  2. R-LOS
  3. R-LOF
  4. MS-RDI
Correct answer: ABC
Question 7
Which of the following statements about U2000 license is incorrect?
  1. Each license file corresponds to the equipment serial number (ESN) of one U2000 computer, and therefore can be used only on the corresponding computer.
  2. Formal U2000 license varies depending on operating system platforms. You must apply for a U2000 license based on the specific operating system.
  3. The U2000 license file is named in the "xxxxxxx.dat" format.
  4. Do not modify license files. Otherwise, the license files will fail.
Correct answer: B
Question 8
The PRBS can be used to test whether an SDH service is normal and whether the protection switching function is normal.
  1. TRUE
  2. FALSE
Correct answer: A
Question 9
The coherent receiver technology uses the local oscillator laser that has the same frequency as received signals to perform coherent processing and recovers the ( ) information from the received signals. (Multiple Choice)
  1. Phase
  2. Frequency
  3. Polarization state
  4. Amplitude
Correct answer: ACD
Question 10
Which of the following is not a condition for triggering multiplex section protection (MSP)?
  1. The MS-AIS signal is detected.
  2. AU-AIS is detected.
  3. R-LOS is detected.
  4. R-LOF is detected.
Correct answer: B
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