Huawei Certified Internetwork Expert-Transmission - H12-931-ENU Exam Questions [2026]

QUESTION NO: 1
For back-to-back OTM sites, three new relay wavelengths are added. The schematic diagram is as follows. The following statement is wrong

A. No need to adjust the VOA on the wave B. No need to adjust the VOA on the repeater wavelength C. No impact on business on OTM site D. There is no need to adjust the input optical power of the optical amplifier board

Correct Answer: B

QUESTION NO: 2
An ETH_LOS or LINK_ERR alarm occurs on a single Ethernet port of a multi-interface Ethernet board, and the service is interrupted.The possible reasons are: the working mode of the Ethernet port is not matched or the interface rate is inconsistent, the optical module hardware is faulty, and the possible reasons are?

A. Optical fiber connection error B. SDH line VC4 channel failure C. Ethernet port attribute setting error D. MTU parameter setting is too small

Correct Answer: A

QUESTION NO: 3
Which of the following are performance related to SM segment errors

A. OTUk_SM_FEBBE B. OTUk_SM_FEES C. OTUk_BBE D. OTUk_PM_BBE

Correct Answer: C

QUESTION NO: 4
The following dispersions exist in single-mode fibers: material dispersion, waveguide dispersion, polarization mode dispersion, and modal dispersion.

A. FALSE B. TRUE

Correct Answer: A

QUESTION NO: 5
After which of the following steps, the rollback operation can no longer be performed

A. Submit B. Distribution C. Activate D. Load

Correct Answer: A

QUESTION NO: 6
When planning AM, you need to consider the priority planning of E1. Which of the following options are the planning principles of E1 priority (multiple choice)

A. The E1 priority function is mainly used in the scenario of Hybrid microwave transmission IMA service. At this time, the guaranteed E1 capacity should be equal to the E1 capacity required by IMA to transmit high-priority services; the full-capacity E1 capacity should be equal to the E1 capacity used by IMA. B. When the E1 priority function is enabled, E1 service bandwidth under full capacity ≤ full capacity service bandwidth-guaranteed capacity service bandwidth + E1 service bandwidth under guaranteed capacity. C. The priority of the E1 service has nothing to do with the time slot number of the IF board it occupies, but the priority is specified when the cross-connection of the E1 service is configured. There are two types of E1 priority: high and low. D. The priority set when an E1 service passes through a multi-hop microwave link can be different.

Correct Answer: A,B,C

QUESTION NO: 7
The maximum number of VBs supported by the EGS4 series of OSN equipment is two, and the maximum number of VBs supported by the EFS4 series single board is 16.

A. FALSE B. TRUE

Correct Answer: B

QUESTION NO: 8
During the degrading process of the smart business, the intermediate node is reset, and the downstream node will have

A. Time slot inconsistency remains B. Time slot reserved residue C. Residual signaling

Correct Answer: C

QUESTION NO: 9
NE1\NE2\NE3 forms a chain network. There are VC4 other services between NE1 and NE3. NE2 is a pass-through site. After the configuration is completed, NE3 site reports the HP-SLM alarm of C2 byte mismatch.
What are the detection points at this time? (multiple choice)

A. NE2 West C2 byte B. NE2 east C2 byte C. NE3 receiving direction C2 byte D. C2 byte in the sending direction of NE1

Correct Answer: C,D

QUESTION NO: 10
Use end-to-end path configuration circuit on the network management, then there will be no discrete services on the network management, and it can ensure that the configured circuit is complete.

A. FALSE B. TRUE

Correct Answer: B

QUESTION NO: 11
A network element cannot join the smart domain after the smart feature is enabled. The possible reasons are: (multiple choice)

A. The network element data is not uploaded; B. N board DCC management RES_ODU channel status is not enabled; C. ODU1_PM_AIS exists on the N board; D. The electrical layer DCC is not surging; E. The smart domain is not refreshed;

Correct Answer: A,B,D,E

QUESTION NO: 12
The reason for reporting the BEFFEC_EXC alarm is that the following statement is wrong

A. The FEC mode settings of the OTU at both ends are incorrect. B. The signal has too much loss in line transmission. C. The input optical power of the OTU board is too high or too low D. This alarm will not be reported in AFEC mode.

Correct Answer: D

QUESTION NO: 13
Regarding the description of SNMP, the following description is wrong

A. SNMP can be applied between the upper and lower network management, or between the device and the network management. B. The structure of SNMP northbound includes OSS (Operating Support System) and Agent. SNMPA is a session layer protocol that specifies how to transfer management information between NMS and Agent. C. The SNMP southbound protocol specifies how to transfer information between the U2000 and network element devices. D. SNMP (Simple Network Management Protocol) is the simple network management protocol.

Correct Answer: B