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Free Huawei H31-311 Practice Questions & Answers 2026 Part3 | HCIA-Transmission

Are you preparing for the Huawei H31-311 certification exam? SPOTO offers the Huawei H31-311 Premium File; all questions are aligned with the latest exam content and come with expert-provided answers. Our question banks cover the latest question types, core concepts, and detailed explanations, helping you familiarize yourself with the exam format and difficulty level. Whether you are reviewing core concepts or simulating a real exam environment, these resources will rapidly boost your confidence and readiness.
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Question #1
In the 2.5G MSP ring consisting of four MSTP sites, when a protection switching occurs, which of the following statements about the alarm reporting is correct?
A. The PS alarm is reported on the tributary board
B. The APS-INDI alarm is reported on the XCS board
C. The APS-INDI alarm is reported on the system control board
D. The APS-INDI alarm is reported on the line board
View answer
Correct Answer: B
Question #2
Manual configuration will clear data on the NE side.
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #3
The SNCP switching speed can be improved if you classify the SNCP services that have the same source, sink, or route into groups.
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #4
Which of the following statements about challenges faced by OTN devices are correct? (Choose all that apply.)
A. nsufficient pipe elasticity
B. ow resource utilization
C. nflexible bandwidth adjustment
D. ot-low-enough latency
View answer
Correct Answer: ABC
Question #5
Which of the following ITLI-T recommendations define the OTN frame structure?
A. G
B. G
C. G
D. G
View answer
Correct Answer: D
Question #6
Linear MSP (LMSP) has two modes: 1+1 and 1:1. Additional services can only be configured for the protection channel in 1:1 mode of the LMSP.
A. True
B. Error
View answer
Correct Answer: A
Question #7
Which of the following overhead bytes needs to be processed at an electrical regeneration site?
A. ll of the above
B. M
C. M
D. CM
View answer
Correct Answer: A
Question #8
When the SXCS board is configured for an OSN 3500, which of the following is the access capacity of the subrack in full configuration?
A. 35G
B. 58
C. 80G
D. 155G
View answer
Correct Answer: D
Question #9
Which of the following operating systems support the installation of the U2000 client?
A. ll of the above
B. USE Linux
C. olaris
D. indows
View answer
Correct Answer: A
Question #10
The rates of the SF64 and SL64 boards are both STM-64. Therefore, the two boards can be interconnected.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #11
The frame structure of 0DU4 is four times that of ODU1.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #12
The frame structure of 0DU4 is four times that of ODU1.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #13
Which of the following statements regarding the sequence of signal flows between the SDH interface and the cross-connecting unit is correct?
A. SPI <> RST <> MST <> MSP<> MSA <> HPT
B. SPI <> RST <> MSA<> MSP<> MST <> HPT
C. SPI <> MST<> RST <> MSA <> MSP >HPT
D. SPT<> MS <> MSA<> RST > MSP<> HPT
View answer
Correct Answer: A
Question #14
Which of the following are the service board types of MSTP devices? (Multiple Choice)
A. Interface board
B. Service processing board
C. Service processing board with interfaces
D. Auxiliary board
View answer
Correct Answer: ABC
Question #15
Compared with a dense wavelength division multiplexing (DWDM) system, a coarse wavelength division multiplexing (CWDM) system provides a certain number of wavelengths and a transmission distance within ( ) km, which greatly reduces system cost and has strong flexibility.
A. 50
B. 100
C. 200
D. 20
View answer
Correct Answer: B
Question #16
Optical fiber loss includes the bending loss, absorption loss, and scattering loss.
A. ALSE
B. RUE
View answer
Correct Answer: A
Question #17
NE A and NE B are adjacent NEs. If B3 and lower-order bit errors occur in the A->B direction and B1, B2, B3, and lower-order bit errors occur in the B->A direction, which of the following performance events are reported by NE A? (Multiple Choice)
A. RSBBE
B. RSFEBBE
C. MSBBE
D. MSFEBBE
E. HPBBE
F. HPFEBBE
View answer
Correct Answer: ACEF
Question #18
When the LCAS function is used/ which of the following overhead bytes are used to transmit control information? (Multiple Choice)
A. M1
B. H4
C. K2
D. K4
View answer
Correct Answer: BD
Question #19
SES: There are 5% or more of the False blocks or at least one defect (OCI/AIS/LCK/IAE/LTC/TIM/PLM) in one second.
A. True
B. False
View answer
Correct Answer: B
Question #20
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
A. Unidirectional path protection ring
B. SNCP ring
C. Bidirectional MSP ring
D. All of the above
View answer
Correct Answer: C
Question #21
NE A and NE B are adjacent NEs. If B3 and lower-order bit errors occur in the A->B direction and B1, B2, B3, and lower-order bit errors occur in the B->A direction, which of the following performance events are reported by NE A? (Multiple Choice)
A. RSBBE
B. RSFEBBE
C. MSBBE
D. MSFEBBE
E. HPBBE
F. HPFEBBE
View answer
Correct Answer: ACEF
Question #22
When configuring the SXCS single board for the OSN3500, which of the following is the access package of the fully configured substand?
A. 35G
B. 58
C. 80G
D. 156 to pick up the answer
View answer
Correct Answer: D
Question #23
A 1510 nm optical supervisory channel can be effectively amplified after it passes an EDFA.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #24
The frame structure of 0DU4 is four times that of ODU1.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #25
Manual configuration will clear data on the NE side.
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #26
The frame structure of 0DU4 is four times that of ODU1.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #27
Which of the following technologies is the main difference between an open DWDM system and an integrated DWDM system?
A. ptical supervisory technology
B. ptical amplification technology
C. avelength conversion technology
D. ultiplexing/Demultiplexing technology
View answer
Correct Answer: C
Question #28
The rates of the SF64 and SL64 boards are both STM-64. Therefore, the two boards can be interconnected.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #29
Manual configuration will clear the data on the NE side
A. True
B. Error
View answer
Correct Answer: A
Question #30
The frame structure of 0DU4 is four times that of ODU1.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #31
Which of the following ITLI-T recommendations define the OTN frame structure?
A. G
B. G
C. G
D. G
View answer
Correct Answer: D
Question #32
In WDM systems, it is ideal to use a dielectric thin problem filter (TFF) when using less than () wavelengths.
A. 4
B. 8
C. 16
D. 20
View answer
Correct Answer: C
Question #33
The working mode of the port determines the flow control mode of the port.When the operating mode is 100Mbit/s full duplex, one of the following flow control modes can be used?
A. Auto-negotiation flow control mode
B. Non-autonegotiation flow control mode
C. Both
D. None of the above
View answer
Correct Answer: B
Question #34
According to the formula "ODUk rate = 239/(239k) x STM-N frame rate", ODU4 The rate is equal tothe 239/235xSTM-N Pa rate.
A. rue
B. alse
View answer
Correct Answer: B
Question #35
K1 and K2 bytes can send APS switching signaling or indicate that the multiplexed segment signal is invalid.
A. True
B. Error
View answer
Correct Answer: A
Question #36
In WDM systems, it is ideal to use a dielectric thin problem filter (TFF) when using less than ()wavelengths.
A.
B.
C. 6
D. 0
View answer
Correct Answer: C
Question #37
According to the formula of "ODUk rate = 239/(239-k) x STM-N frame rate", the ODU4 rate is equal to 239/235 x STM-N frame rate.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #38
EPL services exclusively use ports and band widths, and different users may need to share resources.Which of the following methods can be used to isolate user data?
A. ll of the above
B. inQ technology
C. PLS label
D. LAN ID
View answer
Correct Answer: A
Question #39
Which of the following is the configuration mode for the new NE?( Multiple choices).
A. AManual configuration
B. BUpload
C. CDownload
D. DCopy NE data
View answer
Correct Answer: ABD
Question #40
When a bridge uses the IVL learning mode, the entry in the MAC address table is created according to the source MAC address and source port of the data frame. This entry is valid for all VLANs.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #41
In the 2.5G MSP ring consisting of four MSTP sites, when a protection switching occurs, which of the following statements about the alarm reporting is correct?
A. The PS alarm is reported on the tributary board
B. The APS-INDI alarm is reported on the XCS board
C. The APS-INDI alarm is reported on the system control board
D. The APS-INDI alarm is reported on the line board
View answer
Correct Answer: B
Question #42
Manual configuration will clear data on the NE side.
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #43
NE A and NE B are adjacent NEs. If B3 and lower-order bit errors occur in the A->B direction and B1, B2, B3, and lower-order bit errors occur in the B->A direction, which of the following performance events are reported by NE A? (Multiple Choice)
A. RSBBE
B. RSFEBBE
C. MSBBE
D. MSFEBBE
E. HPBBE
F. HPFEBBE
View answer
Correct Answer: ACEF
Question #44
NE A and NE B are adjacent NEs. If B3 and lower-order bit errors occur in the A->B direction and B1, B2, B3, and lower-order bit errors occur in the B->A direction, which of the following performance events are reported by NE A? (Multiple Choice)
A. RSBBE
B. RSFEBBE
C. MSBBE
D. MSFEBBE
E. HPBBE
F. HPFEBBE
View answer
Correct Answer: ACEF
Question #45
The rate of STM-1 is () bit/s.
A. *270*4*8000
B. *270*1*8000*8
C. *270*1*8000
D. *270*1*8000*16
View answer
Correct Answer: B
Question #46
When configuring LMSP, there are two switching modes: single-ended switching and double-ended switching. Single-ended switching does not require the protection protocol to be enabled.
A. True
B. Error
View answer
Correct Answer: A
Question #47
Which of the following ITLI-T recommendations define the OTN frame structure?
A. G
B. G
C. G
D. G
View answer
Correct Answer: D
Question #48
Only one TCM can be used at a site.
A. ALSE
B. RUE
View answer
Correct Answer: A
Question #49
The rates of the SF64 and SL64 boards are both STM-64. Therefore, the two boards can be interconnected.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #50
The standard Ethernet frame length should not be less than 64 bytes Which of the following factors contribute to this limitation? (Multiple choice).
A. Minimum transmission distance
B. Maximum transmission distance
C. How conflict detection works
D. MAC address
View answer
Correct Answer: BC
Question #51
K1 and K2 bytes can send APS switching signaling or indicate that the multiplexed segment signal is invalid.
A. True
B. Error
View answer
Correct Answer: A
Question #52
Which of the following factors determines that the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent After signals are transmitted for a certain distance in a WDM system, the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent.Which of the following is the main cause?
A. ew types of optical fibers are not used
B. DFAs are used
C. iber attenuation is excessively high
D. ultiplexers and demultiplexers are used
View answer
Correct Answer: B
Question #53
Which of the following working windows is indicated by "2" in the optical module parameter "L-64.2"?
A. 310 nm
B. 550 nm
C. 80 nm
D. 510 nm
View answer
Correct Answer: B
Question #54
The rate of SF64 and SL64 boards is STM54. Therefore, the two plates can be interconnected.
A. True
B. False
View answer
Correct Answer: B
Question #55
Linear MSP (LMSP) has two modes; 1+1 and 1:1. Extra services can be configured for the protection channel only in the 1:1 mode of LMSP.
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #56
The rates of the SF64 and SL64 boards are both STM-64. Therefore, the two boards can be interconnected.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #57
Which of the following descriptions of the electrical layer multiplexing phase mapping steps of ODU0 is wrong?
A. fter mapping and multiplexing, two DDU0 signals can be multiplexed into one OTU1[V] signal
B. fter mapping and multiplexing, 8 ODU0 signals can be multiplexed into 1 0TU2V VI signal
C. fter mapping and multiplexing, 34 0DU0 signals can be multiplexed into 1 OTU3[VM signal
D. 0 0DU0 signals are mapped and multiplexed, and finally multiplexed into 1 OTU4 signal
View answer
Correct Answer: C
Question #58
Which of the following is the functional unit that provides a high-speed signal interface and processes the corresponding signal?
A. Cross-connecting unit
B. Auxiliary units
C. Tributary units
D. Line units
View answer
Correct Answer: D
Question #59
NE A and NE B are adjacent NEs. If B3 and lower-order bit errors occur in the A->B direction and B1, B2, B3, and lower-order bit errors occur in the B->A direction, which of the following performance events are reported by NE A? (Multiple Choice)
A. RSBBE
B. RSFEBBE
C. MSBBE
D. MSFEBBE
E. HPBBE
F. HPFEBBE
View answer
Correct Answer: ACEF
Question #60
In the frame structure of SDH signals, there are abundant overhead bytes used for operation, administration, and maintenance (OAM). The overhead bytes account for ( ) of all bits in the entire frame and greatly enhance the monitoring functions of the network.
A. 1/10
B. 1/20
C. 1/30
D. 1/40
View answer
Correct Answer: B
Question #61
NE A and NE B are adjacent NEs. If B3 and lower-order bit errors occur in the A->B direction and B1, B2, B3, and lower-order bit errors occur in the B->A direction, which of the following performance events are reported by NE A? (Multiple Choice)
A. RSBBE
B. RSFEBBE
C. MSBBE
D. MSFEBBE
E. HPBBE
F. HPFEBBE
View answer
Correct Answer: ACEF
Question #62
Which of the following layers defines the protocols that control the network layer? The protocols of the layer work on logical links, that is end-to-end connections between two devices.
A. pplication layer
B. ransport layer
C. ata link layer
D. etwork layer
View answer
Correct Answer: B
Question #63
NE A and NE B are adjacent NEs. If B3 and lower-order bit errors occur in the A->B direction and B1, B2, B3, and lower-order bit errors occur in the B->A direction, which of the following performance events are reported by NE A? (Multiple Choice)
A. RSBBE
B. RSFEBBE
C. MSBBE
D. MSFEBBE
E. HPBBE
F. HPFEBBE
View answer
Correct Answer: ACEF
Question #64
NE A and NE B are adjacent NEs. If B3 and lower-order bit errors occur in the A->B direction and B1, B2, B3, and lower-order bit errors occur in the B->A direction, which of the following performance events are reported by NE A? (Multiple Choice)
A. RSBBE
B. RSFEBBE
C. MSBBE
D. MSFEBBE
E. HPBBE
F. HPFEBBE
View answer
Correct Answer: ACEF
Question #65
When a bridge uses the IVL learning mode, the entry in the MAC address table is created according to the source MAC address and source port of the data frame. This entry is valid for all VLANs.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #66
Which of the following are the service board types for MSTP devices? (Multiple choice).
A. Interface board
B. Service processing board
C. Service processing board with interface
D. Auxiliary board
View answer
Correct Answer: ABC
Question #67
The frame structure of 0DU4 is four times that of ODU1.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #68
When performing fiber cut - off test on an ordinary MSP ring, which of the following alarms will be reported? (Multiple choice).
A. YOU - AIS
B. R - LOS
C. APSJNDl
D. BD
View answer
Correct Answer: BC
Question #69
Which of the following statements regarding the sequence of signal flows between the SDH interface and the cross-connecting unit is correct?
A. SPI <> RST <> MST <> MSP<> MSA <> HPT
B. SPI <> RST <> MSA<> MSP<> MST <> HPT
C. SPI <> MST<> RST <> MSA <> MSP >HPT
D. SPT<> MS <> MSA<> RST > MSP<> HPT
View answer
Correct Answer: A
Question #70
Which of the following statements about the 1+1 protection of cross-connect boards are correct? (Multiple Choice)
A. The source service board sends services to the active and standby cross-connect boards
B. After service cross-connections are completed, the active and standby cross-connect boards send the data of the active cross-connect board to the sink service board
C. The sink service board can receive only the data from the active cross-connect board
D. The buses of the two cross-connect modules work independently and do not interfere with each other
E. The dual-bus system structure indicates that the service board performs dual feeding of data to the cross-connect side and selective receiving of the data on the cross-connect side
F. Two cross-connect boards have the same configuartion
View answer
Correct Answer: ADEF
Question #71
The rates of the SF64 and SL64 boards are both STM-64. Therefore, the two boards can be interconnected.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #72
NE A and NE B are adjacent NEs. If B3 and lower-order bit errors occur in the A->B direction and B1, B2, B3, and lower-order bit errors occur in the B->A direction, which of the following performance events are reported by NE A? (Multiple Choice)
A. RSBBE
B. RSFEBBE
C. MSBBE
D. MSFEBBE
E. HPBBE
F. HPFEBBE
View answer
Correct Answer: ACEF
Question #73
When LMSP is configured, there are two switching modes: single-ended switching and dual-ended switching. The protection protocol does not need to be enabled for single-ended switching.
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #74
Which of the following is the functional unit that provides a high-speed signal interface and processes the corresponding signal?
A. Cross-connecting unit
B. Auxiliary units
C. Tributary units
D. Line units
View answer
Correct Answer: D
Question #75
K1 and K2 bytes can send APS switching signaling or indicate that the multiplexed segment signal is invalid.
A. True
B. Error
View answer
Correct Answer: A
Question #76
Which of the following ITLI-T recommendations define the OTN frame structure?
A. G
B. G
C. G
D. G
View answer
Correct Answer: D
Question #77
Which of the following statements about the OTM-n .m and OTMnr .m for OTN are incorrect?
A. represents the number of wavelengths carried by the maximum capacity
B. indicates the rate
C. represents OTM
D. TM-nr
View answer
Correct Answer: B
Question #78
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
A. Unidirectional path protection ring
B. SNCP ring
C. Bidirectional MSP ring
D. All of the above
View answer
Correct Answer: C
Question #79
The frame structure of 0DU4 is four times that of ODU1.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #80
Which of the following ITLI-T recommendations define the OTN frame structure?
A. G
B. G
C. G
D. G
View answer
Correct Answer: D
Question #81
Manual configuration will clear data on the NE side.
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #82
Manual configuration will clear data on the NE side.
A. TRUE
B. FALSE
View answer
Correct Answer: A
Question #83
The rates of the SF64 and SL64 boards are both STM-64. Therefore, the two boards can be interconnected.
A. TRUE
B. FALSE
View answer
Correct Answer: B
Question #84
Manual configuration will clear data on the NE side.
A. TRUE
B. FALSE
View answer
Correct Answer: A

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