2021 Latest Huawei H31-311 Real Exam Dumps PDF
H31-311 Exam Dumps, H31-311 Practice Test Questions
Huawei H31-311 Exam Syllabus Topics:
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NEW QUESTION 102
A two-fiber ring topology consisting of three NEs is arranged in the counterclockwise sequence as A, B, and
C. Services between A and C occupy the 48th VC-12 timeslot in the first VC-4 on the short path, and services between B and C also occupy the 48th VC-12 timeslot in the first VC-4 on the short path. In this case, which of the following is the subnet type of the ring protection?
- A. Unidirectional path protection ring
- B. All of the above
- C. SNCP ring
- D. Bidirectional MSP ring r
Answer: D
NEW QUESTION 103
Both PDH and SDH have globally unified standards.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 104
LCK insertion has priority over AIS insertion. That is, if a user configures LCK insertion and the conditions of automatic AIS insertion are met, LCK is inserted.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 105
Which of the following maintenance signals is transmitted from a downstream site to an upstream site in OTN?
- A. IAE
- B. ATS
- C. BDI
- D. LCK
Answer: C
NEW QUESTION 106
Which of the following is the functional unit that provides the interfaces related to the orderwire phone and serial data for the system?
- A. Cross-connect unit
- B. Line unit
- C. Tributary unit
- D. Auxiliary unit
Answer: B
NEW QUESTION 107
Which of the following is not the advantage of WDM?
- A. Completely substituting for SDH devices
- B. Easy to upgrade and maximizing the protection for existing investments
- C. Ultra-large capacity and transparent data transmission
- D. Compatible with all optical switching networks in the future
Answer: A
NEW QUESTION 108
Which of the following statements about the sequence of a signal flow between the SDH interface and the cross-connect unit is correct?
- A. SPI< >MST< >RST< >MSA< >MSP< >HPT
- B. SPI< >RST< >MST< >MSP< >MSA< >HPT
- C. SPI< >RST< >MSA< >MSP< >MST< >HPT
- D. SPT< >MST< >MSA< >RST< >MSP< >HPT
Answer: B
NEW QUESTION 109
Which of the following service levels cannot be selected during service configuration?
- A. VC3
- B. VC12
- C. VC4
- D. VC8
Answer: D
NEW QUESTION 110
Manual configuration will clear data on the NE side.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 111
According to ITU-T recommendations, the requirement that the MSP switching time should be within 50 ms is conditional. For example, the number of NEs on an entire ring network is less than 16.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 112
The TAG attribute cannot be set for the internal port VCTRUNK of the board on the NMS.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 113
The error correction capability of FEC is measured with the encoding gain. Which of the following statements about the encoding gain is incorrect?
- A. The encoding gain of AFEC is larger than that of FEC.
- B. The encoding gain of the inband FEC is larger than that of the outband FEC.
- C. The error correction capability of FEC increases with the encoding gain.
- D. When the BER is constant, the OSNR saved by the correction encoding is called encoding gain.
Answer: B
NEW QUESTION 114
When the rate of an SNCP ring consisting of four OptiX OSN 2500 devices is 2.5 Gbit/s, the service capacity of this network can carry a maximum number of ( ) 2 Mbit/s signals.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 115
The standard Ethernet frame length should not be less than 64 bytes. Which of the following factors cause this limitation? (Multiple Choice)
- A. MAC address
- B. Minimum transmission distance
- C. Working mechanism of conflict detection
- D. Maximum transmission distance
Answer: C,D
NEW QUESTION 116
The working mode of a port determines the flow control mode of the port. When the working mode is 100 Mbit/s full duplex, which of the following flow control modes can be used?
- A. Auto-negotiation flow control mode
- B. None of the above
- C. Both of the above
- D. Non-auto-negotiation flow control mode
Answer: D
NEW QUESTION 117
In the case of MSP, you need to set the MSP protocol ID of each NE. To ensure that each ID is unique, you are advised to set the MSP protocol ID to the same value as the NE ID.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 118
EPL services exclusively use ports and bandwidths, and different users may need to share resources. Which of the following methods can be used to isolate user data?
- A. VLANID
- B. MPLS label
- C. All of the above
- D. QinQ technology
Answer: C
NEW QUESTION 119
The receive end performs BIP-8 check for the unscrambled STM-16 frame. If the BIP-8 check result XOR the value of the B1 byte contained in the following STM-16 frame is 10001100, it indicates that () bit error blocks exist in the STM-16 frame.
- A. 0
- B. Unclear
- C. 1
- D. 2
Answer: D
NEW QUESTION 120
Which of the following statements about the multiplex section remote error indication (MS-REI) is correct?
1. The B2 byte indicates the transmission channel.
2. The Ml byte indicates the transmission channel.
3. MS-REI is transmitted from the sink to the source.
4. MS-REI is transmitted from the source to the sink.
5. Indicates the number of detected bit errors after the sink receives the MS signals.
- A. 1 , 4 , 5
- B. 1 , 3 , 5
- C. 2 , 3 , 5
- D. 2 , 4 , 5
Answer: C
NEW QUESTION 121
An arrayed waveguide grating (AWG) multiplexer/demultiplexer has the following advantages: short wavelength spacing, large number of channels, and flat passband. It suits DWDM systems with ultra-high speed and large capacity.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 122
If a network port that supports auto-negotiation is connected to a network port that does not support auto-negotiation, the half-duplex and full-duplex modes may be interconnected.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 123
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. FALSE
- B. TRUE
Answer: A
NEW QUESTION 124
If the overhead bytes pass through the backplane bus between two slots, the two slots are called paired slots.
Paired slots implement automatic transparent transmission of overhead bytes, such as (),(), and (). This improves MSP switching performance and protects DCC communication with other NEs even if the SCC board on the local NE is offline. (Multiple Choice)
- A. B1 byte
- B. E1 byte
- C. D byte
- D. K byte
Answer: B,C,D
NEW QUESTION 125
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