H31-341_V2.5-ENU Free Certification Exam Easy to Download PDF Format 2026
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NEW QUESTION # 29
When the line board scheduling granularity is ODUflex, which of the following protections can be supported?
- A. Tributary SNCP protection
- B. ODUk SNCP protection
- C. ODUK ring network protection
- D. SW SNCP protection
Answer: B
NEW QUESTION # 30
Which of the following methods can be used to multiplex low-order ODUk to high-order ODUk?
- A. Frequency Division Multiplexing
- B. Wavelength division multiplexing
- C. Time division multiplexing
- D. Space division multiplexing
Answer: C
NEW QUESTION # 31
Which of the following statements about OTN frame structure overheads is false?
- A. The FAS is not scrambled.
- B. The FAS is located at the start position of the OTN frame structure.
- C. OTUk_LOF is generated when FAS framing fails.
- D. The value of FAS changes dynamically with different signals.
Answer: D
Explanation:
The statement that the value of FAS (Frame Alignment Signal) changes dynamically with different signals is false. The FAS is a fixed sequence placed at the start of the OTN frame structure to enable frame synchronization. It does not change dynamically, as its fixed pattern is crucial for reliable frame alignment and error detection. OTUk_LOF (Loss of Frame) alarms are generated when FAS framing fails, indicating synchronization loss. HCIP-Transmission stresses the fixed nature of FAS for consistent framing and alignment across the OTN network layers.
NEW QUESTION # 32
When the bridge uses IV L learning mode. Create an entry in the MAC address table based on the original MAC address and original port of the data frame. This entry applies to all VLANs
- A. True
- B. False
Answer: B
NEW QUESTION # 33
Which of the following alarms will not be generated for the alarm?
- A. MS-AIS
- B. TU-AIS
- C. R-LOS
- D. HP-TIM
Answer: C
NEW QUESTION # 34
The EPL service exclusively uses the bandwidth on the line. This is very secure. Dedicated line application for VIP customers.
- A. False
- B. True
Answer: B
NEW QUESTION # 35
In the daily maintenance scenario, which of the following descriptions about the fan is correct? (Multiple choice)
- A. When 2 or more of the 4 fans of the FAN board fail, it is not necessary to replace the FAN board immediately
- B. The fan does not support hot swapping, and the fan cannot be pulled out directly
- C. When one of the four fans on the FAN board fails, the device can still run normally for 96 hours
- D. The fan supports hot-swapping, and the fan can be pulled out directly for cleaning
Answer: C,D
NEW QUESTION # 36
Which of the following statements about the main and backup channels of optical line protection is wrong?
- A. "Master-standby channel difference threshold (dB)" - used to set the difference between the main and standby optical ports of the board when the optical power difference reaches a certain value, it will be regarded as a signal failure (SF).
- B. If the current optical power difference between the active and standby channels exceeds the "main and standby channel difference threshold (dB)", the system will initiate protection switching.
- C. "Initial Difference Between Active and Standby Channels (dB)"—the reference value used to set the optical power difference between the active and standby channels of the board.
- D. When the difference in the optical power of the full backup exceeds the threshold, the optical switch will switch the service to the backup channel, and the set value supports query. Recommended setting is 5dB
Answer: D
NEW QUESTION # 37
The fully standardized optical transport unit OTUK is an OTUk frame that fully complies with ITU-T G.709 recommendations, and it has the precise field format, field size and type specified in ITU-T G.709.
- A. False
- B. True
Answer: B
NEW QUESTION # 38
Which of the following are common methods for NG WDM system fault analysis and location? (Multiple choice)
- A. Signal Flow Analysis
- B. Alerting and Performance Analysis
- C. Substitution method
- D. Loopback method
- E. Instrument test method
Answer: A,B,C,D,E
NEW QUESTION # 39
When configuring the basic properties of the Ethernet interface of the EM20 single board, the default value adopted for the "maximum frame length" is?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 40
In a 1+1 OTS optical line protection scenario, when the network is normal, the input optical power of the RI1 port on the OLP board is 10 dBm and that of the RI2 port on the OLP board is 8 dBm. The initial input difference between the working and protection channels is set to the default value 0dB, and the input difference threshold of the working and protection channels is set to default value 5dB. Which of the following scenarios can trigger switching?
- A. The active optical cable is broken, and the loss of the standby optical cable increases by 5 dB.
- B. The loss of the active optical cable increases by 6 dB. and the loss of the standby optical cable remains unchanged.
- C. The loss of the active optical cable increases by 7 dB. and the loss of the standby optical cable remains unchanged.
- D. The loss of the active optical cable increases by 7 dB. and the loss of the standby optical cable increases by 2 dB.
Answer: C
Explanation:
With an initial RI1-RI2 difference of 2 dB and a 5 dB threshold, only when the active channel's loss increases by 7 dB (to 3 dBm) while the standby remains at 8 dBm does the difference reach 5 dB and trigger switching.
NEW QUESTION # 41
OTUk_DEG indicates OTUk signal degradation. Which of the following statements about the bit error detection mode are true? (Choose all that apply.)
- A. When bit errors are detected in burst mode, this alarm is reported after signal degradation occurs.
- B. When bit errors are detected in burst mode, this alarm is reported after signal degradation or bit error threshold crossing occurs.
- C. When bit errors are detected in Poisson mode, this alarm is reported after signal degradation occurs.
- D. When bit errors are detected in Poisson mode, this alarm is reported after signal degradation or bit error threshold crossing occurs.
Answer: A,B
Explanation:
In burst mode, an OTUk_DEG alarm is triggered when bit errors cause signal degradation, even if the error count threshold isn't crossed.
In burst mode, the alarm also occurs if the number of bit errors within the detection window exceeds the configured threshold.
NEW QUESTION # 42
The output network requires a higher cost than the belt network. But provides a more reliable management channel.
- A. False
- B. True
Answer: B
NEW QUESTION # 43
In the path search process of the U2000 network management, the path search management module first scans the cross-connections of each network element, constructs sub-paths according to the cross-connections of adjacent network elements, and tries to merge these sub-paths at the same time. Which of the following sub-paths is legal?
- A. Subpaths form a loop
- B. The original destination is not the end point of the subpath or the optical port of the subnet
- C. The sub-path terminates on the pre-configured network element
- D. The path does not pass through the fiber
Answer: C
NEW QUESTION # 44
Which of the following alarms can trigger the 1+1 protection on the client side? (Multiple choice)
- A. ODUk_PM_LCK
- B. ODUk_PM_AIS
- C. ODUk_PM_OCI
- D. OTUk_LOF
Answer: A,B,C,D
NEW QUESTION # 45
LAG can only be configured in non-load sharing mode
- A. True
- B. False
Answer: B
NEW QUESTION # 46
Which of the following is the overall structure of the WDM system with N-channel wavelength multiplexing? (Multiple choice)
- A. Optical amplification unit
- B. Monitoring unit
- C. Optical wavelength conversion unit
- D. WDM unit
- E. Intersection unit
Answer: A,B,C,D
NEW QUESTION # 47
In the WDM network design, as long as enough EDFAs are cascaded to compensate the optical power loss in the transmission process. Then the system can transmit very long distance without limitation.
- A. True
- B. False
Answer: B
NEW QUESTION # 48
The receiving overload point of the APD diode is 0dBm.
- A. True
- B. False
Answer: B
NEW QUESTION # 49
When inserting LCK to the ODUk signal at the local end, which processing will the downstream station system not perform?
- A. Down plug DDUk_PM_LCK alarm
- B. Report ODUk_PM_LCK alarm
- C. Return DDUk_PM_BDI
- D. Insert DDUK_AIS information
Answer: A
NEW QUESTION # 50
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The H31-341_V2.5 Exam covers a wide range of topics related to transmission networks, including optical fiber technology, WDM technology, SDH technology, and network management. H31-341_V2.5-ENU exam is divided into two parts, written and lab exams. The written exam tests the candidate's knowledge of transmission network principles and theories, while the lab exam evaluates their ability to configure and maintain transmission networks.
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