[Jul-2025] Check your preparation for Huawei H31-311_V2.5 On-Demand Exam [Q201-Q219]

QUESTION 201
A and B are adjacent network elements. If A sends B with B3 and low-order errors, and B sends A with B1, B2, B3 and low-order errors, which of the following options are included in the performance events of A network element? (Multiple choice)

QUESTION 202
When 172.17.15.0/24 is subnetted using an extra 4 bits, which of the following addresses are legal subnet addresses? (Multiple choice)

QUESTION 203
OPC is an optical layer platform board that needs to be used with a pluggable module to work properly.

QUESTION 204
The segment overhead of STM-4 is 9+9+4 lines/frame.

QUESTION 205
Two beams of light that meet the coherence condition are called coherent light. Two coherent light beams will produce interference phenomenon in the area where they meet. Which of the following meet the coherence condition? (Multiple choice)

QUESTION 206
In a wavelength division multiplexing system, when the number of wavelengths is less than how many, is it ideal to use a dielectric thin film filter?

QUESTION 207
The wavelength division system mainly uses DCM compensation to compensate for chromatic dispersion. Which of the following descriptions about DCM dispersion compensation is wrong?

QUESTION 208
Which of the following is the functional unit that provides serial data for the interface and system associated with the orderwire phone?

QUESTION 209
Array waveguide grating (AWG) multiplexer/multiplexer has the following advantages: short wavelength spacing, large number of channels and flat passband. Suitable for DWDM systems in ultra-high speed, large tubes.

QUESTION 210
The dual fiber ring topology consisting of three network elements is arranged in counterclockwise order as the service between A, B and C A and C occupies the first VC-48 on the short path VC-12 time slots, B and C of the same service also occupy the 48th of the first VC-4 on the short path VC-12 time slots

QUESTION 211
Arrayed Guided Grating (AWG) multiplexer/demultiplexer has the following advantages: short wavelength spacing, large channels and flat passband. It is suitable for ultra-high-speed, large-capacity DWDM systems.

QUESTION 212
When the working channel of the optical line protection fails, it cannot automatically switch to the protection channel. What are the possible reasons? (Multiple choice)

QUESTION 213
In the network interface of OTN, the network interface within the same operator is the intra-domain interface, which is further divided into the interface between equipment from different manufacturers, IaVI, and the interface within the subnet of equipment from the same manufacturer, IrVI, according to the different equipment manufacturers.

QUESTION 214
When the ACT indicator light of the SDH board is off, it means that the board has a hardware failure and cannot be used.

QUESTION 215
For SDH equipment, in the STM-N frame structure, the rate corresponding to each bit is () b/s.

QUESTION 216
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)

QUESTION 217
Which of the following descriptions about the TNG2M 402D board is wrong?

QUESTION 218
RSOH, MSOH, HPOH and LPOH complete the monitoring functions in a layered manner.

QUESTION 219
In Huawei’s T-SDN network architecture, () realizes centralized control of single-domain networks, and () is responsible for multi-domain cross-vendor management