Check the Available H31-341_V2.5-ENU Exam Dumps with 122 QA’s UPDATED 2026 [Q63-Q80]

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Check the Available H31-341_V2.5-ENU Exam Dumps with 122 QA’s UPDATED 2026

Download H31-341_V2.5-ENU Exam Dumps Questions to get 100% Success in Huawei

Q63. Which of the following descriptions about the modulation technology of 40Gbit/s and 100Gbit/s coherent systems is correct? (Multiple choice)

The modulation technology used in the 40G coherent system is ePDM-BPSK

The modulation technology used in the 100G coherent system is ePDM-BPSK

The modulation technology used in the 40G coherent system is ePDM-QPSK

The modulation technology used in the 100G coherent system is ePDM-QPSK

Q64. The ODUk serial monitoring overhead supports multiple maintenance signals. When the ODUk_TCM_LCK maintenance signal is generated, which of the following is detected by STAT?

101

010

111

110

Q65. In the SDH multiplexing structure, the rate represented by VC-12 is () Mbit/s

Q66. Which of the following factors determine that the optical signal-to-noise ratio (OSNR) at the receiving end is reduced to a certain extent. After the signal is transmitted for a certain distance in the WDM system, the optical signal-to-noise ratio (OSNR) at the receiving end is reduced to a certain extent.
Which of the following is the main reason?

Using EDFA

Using multiplexers and demultiplexers

Do not use new fiber optics

Fiber attenuation is too high

Q67. Which of the following comparisons between commonly used optical fibers G.652 and G.655 is correct? (Multiple choice)

G52 has a larger core diameter than G.655

The chromatic dispersion coefficient of BG52 is smaller than that of G.655

G52 can withstand higher fiber input power than G.655

The attenuation coefficient of DG52 is lower than that of G.655

Q68. The instruments commonly used in the daily maintenance and troubleshooting of MSTP equipment are? (Multiple choice)

Optical power meter

Bit Error Tester

Multimeter

Fixed light attenuation

Q69. The gain of the OAU single board is 23db, and 1% of the total output power of the OAU single board is used for MON detection. Now the output optical power of the MON port is tested to be – 8dbm, and the input optical power of the IN port of the OAU single board is?

-11dbm

-13dbm

-15dbm

-21dbm

Q70. Which of the following options is the low-loss area of single-mode fiber? (Multiple choice)

1310nm

900nm

1550nm

1200nm

Q71. A VOA is configured on each wavelength path of a WSS board to adjust the____of optical signals to achieve flatness adjustment. (Enter only lowercase letters.)

Power
Explanation:
A VOA (Variable Optical Attenuator) is configured on each wavelength path of a WSS (Wavelength Selective Switch) board to adjust the power of optical signals. This power adjustment is crucial to achieve flatness across channels by compensating for varying signal intensities. Without such adjustment, some wavelengths may overpower others, causing nonlinear effects and signal degradation. The VOA ensures that all wavelength channels have balanced power levels, improving signal quality and network reliability. This principle is fundamental in dense WDM networks and is emphasized in HCIP-Transmission studies focusing on optical layer signal integrity and amplification management.

Q72. If the mask of an IP subnet is 27 bits, how many hosts does the subnet have?

An IP subnet mask of 27 bits means 32 – 27 = 5 bits are left for host addresses. The number of hosts per subnet is 2^5 – 2 = 30. The subtraction of 2 accounts for the network address and broadcast address, which cannot be assigned to hosts. This calculation is fundamental in IP subnetting and is widely used in network design to allocate IP address ranges efficiently. HCIP-Transmission materials include these principles as part of the networking fundamentals necessary for transmission network engineers.

Q73. If there is only a single channel interval, automatically plan the allocation from short wavelength to long wavelength according to the default channel.

True

False

Q74. Which of the following statements about OUT boards are true? (Choose all that apply.)

Standard mode has fewer mapping path layers than compatible mode.

Boards in standard mode are easy to operate and can reduce maintenance costs.

For boards in standard mode, only the service mapping paths of channels or physical ports are displayed on the NMS, and all ODU-layer service mapping paths are displayed at physical ports.

For boards in compatibility mode users do not need to concern about the internal logical ports of the boards when configuring cross-connections

Standard mode reduces the number of visible mapping layers by hiding internal ODU-layer paths compared to compatibility mode.
By collapsing internal mappings, standard mode simplifies configuration and lowers maintenance effort.
In standard mode the NMS displays only channel- or physical-port level mappings, with all ODU-layer mappings aggregated at the port view.

Q75. Which of the following description of the 100G mixed transmission system is wrong?

Coherent and non-coherent signals (10G and 40G ODB will affect each other, resulting in a sharp drop in performance, and isolation bands are necessary)

40G DQPSK and coherent signals will not affect each other without isolation band

10G starts from a short wavelength, and the isolation band can be filled with 40G DQPSK wavelength

The cost of mixed transmission is related to the number of transmission spans and the width of the isolation bandwidth, and has nothing to do with the FEC encoding method

Q76. By resetting a single board, restarting a single station, re-delivering configuration, or switching services to a backup channel, it is possible to effectively troubleshoot and restore services in a timely manner. Therefore, maintenance personnel can first rely on their previous experience to deal with faults.

True

False

Q77. The optical amplification unit can make up for the line loss and increase the transmission distance, and the system transmission distance can be extended to infinity through multi-level cascading.

True

False

Q78. If a fiber break occurs between the amplifier OA and the FIU, which of the following alarms will be reported by the system?

MUT_LOS

R_LOS

OTS_LOS

OMS_LOS

Q79. Which of the following descriptions about the DWSS20 board is correct? (Multiple choice)

Support the optical power query function of DM01~DM20, AM1~AM20 and IN/OUI optical ports on the network management system.

It can realize the optical power adjustment function for each wavelength in the sending direction and receiving direction.

For the pass-through service, only one pair of optical fibers needs to be connected in the two directions.

It can realize the multiplexing and demultiplexing functions of coherent signals and non-coherent signals.

Q80. There is a VOA on each wavelength path of WSS to realize the () adjustment of the optical signal, so as to realize the adjustment of flatness.

optical power

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Huawei H31-341_V2.5 exam consists of multiple-choice questions and simulation questions that test the candidate’s ability to apply their knowledge to real-world scenarios. H31-341_V2.5-ENU exam covers a wide range of topics, including transmission network planning and design, network topology and protocol selection, equipment configuration and commissioning, network maintenance and troubleshooting, and more. H31-341_V2.5-ENU exam is designed to be challenging, and candidates are required to demonstrate a high level of proficiency in order to pass.

Huawei H31-341_V2.5 (HCIP-Transmission V2.5) Certification Exam is an important certification for professionals who want to enhance their skills and knowledge in the field of transmission technology. HCIP-Transmission V2.5 certification is recognized globally and is highly valued by employers in the industry. HCIP-Transmission V2.5 certification demonstrates that the professional has the necessary skills and knowledge to design and maintain transmission networks.

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