Free Huawei H31-341 Practice Questions & Answers 2026 Part1

Question #1

The receiver of an OTU board is an avalanche photodiode (APD). Which of the following is within the input optical power range?

A. 4dBm

B. 15dBm

C. dBm

D. 30dBm

View answer

Correct Answer: A

Question #2

Which of the following is not an advantage of WDM?

A. Transparent transmission of data

B. Various overheads

C. Ultra-large capacity and ultra-long haul transmission

D. Flexible, economical, and reliable networking

View answer

Correct Answer: D

Question #3

Dispersion compensation is not required for 40 Gbit/s and 100 Gbit/s coherent systems because the dispersion tolerance of coherent boards is large. NG WDM products do not support hybrid transmission of non-coherent and coherent networks.

A. True

B. False

View answer

Correct Answer: B

Question #4

Dispersion compensation is not required for 40 Gbit/s and 100 Gbit/s coherent systems because the dispersion tolerance of coherent boards is large. NG WDM products do not support hybrid transmission of non-coherent and coherent networks.

A. True

B. False

View answer

Correct Answer: B

Question #5

Dispersion compensation is not required for 40 Gbit/s and 100 Gbit/s coherent systems because the dispersion tolerance of coherent boards is large. NG WDM products do not support hybrid transmission of non-coherent and coherent networks.

A. True

B. False

View answer

Correct Answer: B

Question #6

What is the networking mode of a parallel FOADM site?

A. X40+ EMR8

B. X40+EX40

C. R4+MR4

D. MR8+EMR8

View answer

Correct Answer: A

Question #7

A service traverses two WDM rings, the two WDM rings are tangent, and the tangent NEs share an electrical subrack. To Implement segmented ODUk 5NCP, that is, the protection that can protect services from one fault on each ring, which of the following protection schemes must be configured?

A. SNC/SorSNC/N

B. SNC/I

C. SNC/S

D. SNC/N

View answer

Correct Answer: C

Question #8

The lower the noise figure of the amplifier, the less noise is introduced by this amplifier.

A. ALSE

B. RUE

View answer

Correct Answer: B

Question #9

When a member port is added to or deleted from a static LAG, LACP must be started.

A. ALSE

B. RUE

View answer

Correct Answer: A

Question #10

Which of the following features is used by a laser to coherently receive optical signals and restore the amplitude, phase, and state of polarization information from the received signals?

A. Same oscillation direction

B. Same amplitude

C. Opposite oscillation directions

D. Same frequency

View answer

Correct Answer: D

Question #11

Which of the following protection schemes require the APS protocol?

A. ODUk SPRing protection

B. ODUk SNCP

C. SW SNCP

D. 1:1 optical line protection

View answer

Correct Answer: C

Question #12

Which of the following DCC types are used by ESC? (Choose all that apply.)

A. ilot-tone DCC

B. ixed frame structure DCC

C. nserted DCC

D. mbedded DCC

View answer

Correct Answer: BD

Question #13

MPLS tunnel APS protection supports multiple types of command switching and has different priorities. Which of the following command switching types has the highest priority?

A. Locked Switching

B. Practice Switching

C. Force Switching

D. Manual Switching

View answer

Correct Answer: A

Question #14

The core component of ROADM is a wavelength selective switch (WSS).

A. RUE

B. ALSE

View answer

Correct Answer: A

Question #15

Which of the following features is used by a laser to coherently receive optical signals and restore the amplitude, phase, and state of polarization information from the received signals?

A. Same oscillation direction

B. Same amplitude

C. Opposite oscillation directions

D. Same frequency

View answer

Correct Answer: D

Question #16

Modulation is a process where the information of a signal source is processed and added to a carrier to make the information suitable for channel transmission. It is a technology where a carrier changes with a signal.

A. TRUE

B. FALSE

View answer

Correct Answer: A

Question #17

Which of the following reasons does not cause optical power anomalies?

A. nable FEC function

B. he pigtail is too large

C. quipment temperature is too high

D. igtail connection error

View answer

Correct Answer: A

Question #18

Modulation is a process where the information of a signal source is processed and added to a carrier to make the information suitable for channel transmission. It is a technology where a carrier changes with a signal.

A. TRUE

B. FALSE

View answer

Correct Answer: A

Question #19

Which of the following fiber types complies with the description that the dispersion at 1310 nm is 0 and the typical dispersion coefficient around 1550 nm is 17 ps/nm.km?

A. AG

B. BG

C. CG

D. DG

View answer

Correct Answer: B

Question #20

When the loopback method is used, the objects to be replaced can be optical fibers, boards, fiber adapters, optical attenuators, or power supply devices.

A. TRUE

B. FALSE

View answer

Correct Answer: A

Question #21

Which of the following terms has the meaning that "the wavelength carrying local services can betransmitted to a specific direction"?

A. irectioned

B. irectionless

C. olorless

D. olored

View answer

Correct Answer: A

Question #22

During CV/FFD, the ingress node transmits detection packets at a specific interval, and the egress node checks the number and content of these packets at an interval ( ) times the length of the detection packet transmission interval.

A.

B. 0

C.

D. 5

View answer

Correct Answer: A

Question #23

In the TCP/IP protocol stack, what layer does TCP/UDP reside on?

A. Network layer

B. Transport layer

C. Data link layer

D. Application layer

View answer

Correct Answer: B

Question #24

The following description of the signal flow of the OTM site (OSN 8800 device), which is wrong?

A. ervice transmission direction: SDH signals-> LSX-> M40V-> OBU1-> Line

B. ervice receiving direction: Line->FIU-> OAU-> M40V-> LSX-> SDH signals

C. ervice transmission direction: SDH signals-> LSX->M40V-> OBU1-> FIU-> Line

D. SC receiving direction: Line-> FIU-> Sc2

View answer

Correct Answer: B

Question #25

Which of the following are not non-linear effects? (Choose all that apply.)

A. MD

B. WM

C. RS

D. D

View answer

Correct Answer: AD

Question #26

Which of the following SOM systems is not monitored?

A. ight performance flatness

B. ain light path performance

C. eceive OTU input optical power

D. ype of originating FEC

View answer

Correct Answer: D

Question #27

Modulation is a process where the information of a signal source is processed and added to a carrier to make the information suitable for channel transmission. It is a technology where a carrier changes with a signal.

A. TRUE

B. FALSE

View answer

Correct Answer: A

Question #28

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. he loss of the active optical cable increases by 7 dB

B. he loss of the active optical cable increases by 6 dB

C. he loss of the active optical cable increases by 7 dB

D. he active optical cable is broken, and the loss of the standby optical cable increases by 5 dB

View answer

Correct Answer: A

Question #29

Which of the following is not an advantage of WDM?

A. Transparent transmission of data

B. Various overheads

C. Ultra - large capacity and ultra - long haul transmission

D. Flexible, economical, and reliable networking

View answer

Correct Answer: D

Question #30

Which of the following trails can be configured on the NMS.

A. OTS

B. ODUk

C. client

D. OCh

View answer

Correct Answer: A

Question #31

Generally, which of the following operations will interrupt services on live networks?

A. ACold reset on a service board

B. BWarm reset on a service board

C. CHardware loopback

D. DSoftware loopback

View answer

Correct Answer: ACD

Question #32

The 40 Gbit/s and 100 Git/s coherent systems do not require dispersion compensation because the coherent board has a large dispersion tolerance. NG WDM does not support non-coherent networks and coherent networks for hybrid transmission.

A. ALSE

B. RUE

View answer

Correct Answer: A

Question #33

The single-fiber bidirectional WDM system uses only one fiber to transmit optical signals in both directions simultaneously. The optical signals in both directions should be arranged at different wavelengths.

A. ALSE

B. RUE

View answer

Correct Answer: B

Question #34

Dispersion compensation is not required for 40 Gbit/s and 100 Gbit/s coherent systems because the dispersion tolerance of coherent boards is large. NG WDM products do not support hybrid transmission of non-coherent and coherent networks.

A. True

B. False

View answer

Correct Answer: B

Question #35

What does ODUk_PM_BDI indicate?

A. DUk PM signal degradation

B. DUk PM open connection indication

C. DUk PM backward defect indication

D. DUk PM section BIP-8 bit error threshold crossing

View answer

Correct Answer: C

Question #36

MPLS tunnel APS protection supports multiple types of command switching and has different priorities. Which of the following command switching types has the highest priority?

A. Locked Switching

B. Practice Switching

C. Force Switching

D. Manual Switching

View answer

Correct Answer: A

Question #37

Lower ground resistance indicates better grounding, that is, faster conduction of current to the ground.

A. TRUE

B. FALSE

View answer

Correct Answer: A

Question #38

Which of the following fiber types complies with the description that the dispersion at 1310 nm is 0and the typical dispersion coefficient around 1550 nm is 17 ps/nm.km?

A.

B.

C.

D.

View answer

Correct Answer: B

Question #39

Modulation is a process where the information of a signal source is processed and added to a carrier to make the information suitable for channel transmission. It is a technology where a carrier changes with a signal.

A. TRUE

B. FALSE

View answer

Correct Answer: A

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