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Huawei H31-311_V2.5 : HCIA-Transmission V2.5 exam consists of multiple-choice questions and simulation questions. H31-311_V2.5 exam is conducted online and is computer-based. The duration of the exam is two hours, and the passing score is 60%. H31-311_V2.5 exam is available in multiple languages, including English, Chinese, and Japanese.
NEW QUESTION # 358
Which of the following options are insufficient for Erbium-doped Fiber Amplifiers? (Multiple choice)
- A. Gain range is fixed and limited
- B. Low noise index
- C. Optical surge problem
- D. Gain non-flatness
Answer: A,C,D
NEW QUESTION # 359
Which of the following options are available for ODUk SNCP switching conditions? (Multiple choice)
- A. OTUK_LOF
- B. OSC LOS
- C. R_LOS
- D. Main control module failure
Answer: A,C
NEW QUESTION # 360
Which of the following descriptions about signal marker byte C2 is wrong?
- A. C2=00H means the VC-4 is not loaded
- B. If the receiving and sending are mismatched, the corresponding VC-4 channel on the local end generates an LP_SLM alarm
- C. Its function is to indicate the multiplexing structure of the VC frame and the nature of the information payload
- D. C2 byte setting requires that the sender and receiver match
Answer: B
NEW QUESTION # 361
OTN has its own unique frame structure and rich overheads to operate, manage and maintain signals during transmission, such as SM, PM and TCMi overheads to monitor service signals at each level.
- A. False
- B. True
Answer: B
NEW QUESTION # 362
The thickness, material and refractive index of the fiber core and cladding material have a decisive influence on the properties of the optical fiber.
- A. False
- B. True
Answer: B
NEW QUESTION # 363
WDM multiplexes optical signals at multiple speeds (wavelengths) through one optical fiber for transmission. The digital signals carried by these optical signals must have the same speed and data format.
- A. True
- B. False
Answer: B
NEW QUESTION # 364
TTL, time to live, is mainly used to limit the number of hops that an IP data packet can pass through the router in the network. If TTL=1, it means that the data packet can only be transmitted in its own LAN.
- A. False
- B. True
Answer: B
NEW QUESTION # 365
Which of the following are device-level protection schemes for SDH products? (Multiple choice).
- A. System dashboard protection
- B. Cross-connect and timer board protection
- C. TPS protection
- D. Power protection
Answer: A,B,C,D
NEW QUESTION # 366
Which of the following options does WDM have for light source requirements? (Multiple choice)
- A. Larger output power
- B. Larger dispersion tolerance
- C. Output standard wavelength
- D. Output stable wavelength
Answer: B,C,D
NEW QUESTION # 367
Which of the following optical fibers has the following dispersion characteristics: the dispersion is 0 at 1310nm, and the typical dispersion coefficient is 17ps/nm.km near 1550nm?
- A. G.654
- B. G.652
- C. G.655
- D. G.653
Answer: B
NEW QUESTION # 368
Which of the following is affected by changing the element ID of OSN3500 on NMS?
- A. Network element communication is interrupted.
- B. NE time is out of sync.
- C. Interruption of business.
- D. Restart your device.
Answer: A
NEW QUESTION # 369
In a plane perpendicular to the transmission direction, the optical signal field can have two mutually orthogonal and independent vibration directions, generally named X polarization and Y polarization.
Polarization multiplexing utilizes this property of optical signals and modulates service signals in two orthogonal polarization directions of light.
- A. False
- B. True
Answer: B
NEW QUESTION # 370
When there is no frequency difference and phase difference between VC-4 and AU-4, and between VC-12 and TU-12, the AU-PTR value is 522 and the TU-PTR value is 70.
- A. False
- B. True
Answer: B
NEW QUESTION # 371
The optical amplifier unit compensates for line losses and extends the transmission distance.
Connecting multiple optical amplifier units in cascade mode can extend the transmission distance of the system indefinitely.
- A. True
- B. False
Answer: B
NEW QUESTION # 372
Currently, the most commonly used signal is 2Mbit/s. Which of the following steps are involved in the process of multiplexing 2Mbit/s signals into STM-N? (Multiple choice)
- A. Scrambling
- B. Add pointer
- C. Add segment overhead
- D. Rate Adaptation
Answer: B,C,D
NEW QUESTION # 373
When using the LCAS function, which of the following overhead bytes is used to transmit control information? (Multiple Choices)
- A. H4
- B. M1
- C. K4
- D. K2
Answer: A,C
NEW QUESTION # 374
The only functional difference between OPSA and OPSB is that OPSA has () after the splitter, while OPSB does not.
Answer:
Explanation:
VOA
NEW QUESTION # 375
The clock unit can only access the external clock source as the timing signal source of the system through the external clock interface. In addition, it can also output the processed clock and provide the clock source for other devices that need timing.
- A. True
- B. False
Answer: B
NEW QUESTION # 376
Which of the following overhead does not belong to ODUk overhead?
- A. APS/PCC
- B. PM
- C. NJO
- D. TCM
Answer: C
NEW QUESTION # 377
When a device that supports auto-negotiation is connected to a device that does not support auto- negotiation, a duplex mode mismatch may occur. What are the manifestations? (Multiple choice)
- A. Abnormal connection
- B. The communication rate is very low
- C. The communication rate is normal
- D. The connection is normal
Answer: B,D
NEW QUESTION # 378
Which of the following options belong to the functions in the NCE-T analysis domain? (Multiple choice)
- A. SLA Analysis
- B. Health prediction
- C. Business issuance
- D. Performance Management
Answer: B,C,D
NEW QUESTION # 379
When the working PQ1 board is oversized, the device will perform and the TFS protection will be reversed. Which of the following statements about the switching process are correct? (Multiple choice).
- A. The D75S board responds to the switch message by transmitting the service to the shared protection bus and stopping sending the service to the tyrant PQ1 board
- B. The protection PQ1 board receives and processes the services transmitted from the D75S board to the protection bus to complete the protection switching
- C. If the protection PQ1 board is normal, the cross-connection board sends a switching message to the D75S corresponding to the faulty PQ1 board through the switching control bus. .
- D. cross-connect board checks the PQ1 board fault through the board status bus. .
Answer: A,B,C,D
NEW QUESTION # 380
Optical module parameter "L-64.2" in "2" indicates which of the following working windows?
- A. 880 nm
- B. 1310 nm
- C. 1550nm
- D. 1610nm
Answer: C
NEW QUESTION # 381
Which of the following descriptions about the slot settings of the OSN 6800 subrack is wrong?
- A. When the IU17 slot is not configured with SCC, the OTU board can be inserted to provide service cross-connection function
- B. IU19 and IU20 are fixed for inserting the power access board PIU. Each PIU can independently support the sub-rack power supply.
- C. Slots IU17 and IU18 can be used for the main control board SCC. Each SCC can independently support subrack management
- D. U9 and IU10 slots can be used for cross-connection boards XCS. Each XCS can independently support cross-connection of all services between slots.
Answer: A
NEW QUESTION # 382
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