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Huawei H31-311 Exam Syllabus Topics:
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NEW QUESTION 11
The EPL service exclusively uses bandwidth on the line, which is highly secure. It is applicable to the private line application of VIP customers.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 12
The single-fiber bidirectional WDM system uses only one optical fiber to transmit optical signals in two directions at the same time. The optical signals in the two directions should be arranged at different wavelengths.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 13
A PAUSE frame uses a reserved multicast address and is not forwarded by a bridge or switch, In this way, the PAUSE frame does not generate any additional information.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 14
Which of the following are VLAN classification methods? (Multiple Choice)
- A. By subnet
- B. By MAC address
- C. By protocol
- D. By port
Answer: A,B,C,D
NEW QUESTION 15
Which of the following operating systems support the installation of the U2000 client?
- A. All of the above
- B. Solaris
- C. SUSE Linux
- D. Windows
Answer: A
NEW QUESTION 16
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. All of the above
- B. Unidirectional path protection ring
- C. Bidirectional MSP ring r
- D. SNCP ring
Answer: C
NEW QUESTION 17
When the transmit end detects that the b6-b8 of the K2 byte is 110, it indicates that the () alarm is reported at the transmit end.
- A. R-LOF
- B. R-LOS
- C. MS-RDI
- D. MS-AIS
Answer: A,B,D
NEW QUESTION 18
Which of the following overhead bytes needs to be processed at an electrical regeneration site?
- A. All of the above
- B. TCM
- C. SM
- D. PM
Answer: A
NEW QUESTION 19
After an optical fiber is connected according to the networking diagram, if a critical alarm is reported on the optical port, the SRV indicator on the line board is red.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 20
The rate of STM-1 is () bit/s.
- A. 9*270*1*8000
- B. 9*270*1*8000*8
- C. 9*270*1*8000*16
- D. 9*270*4*8000
Answer: B
NEW QUESTION 21
The interval between two adjacent pointer justification events is at least ( ) frames.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 22
When bit errors are detected in the B2 byte, which of the following alarms is reported by the peer end?
- A. RS-BBE
- B. MS-BBE
- C. MS-FEBBE
- D. MS-AIS
Answer: C
NEW QUESTION 23
WDM multiplexes the optical signals at multiple rates (wavelengths) over one fiber for transmission. The digital signals carried by these optical signals must have the same rate and data format.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 24
Which of following are the configuration modes of new NEs? (Multiple Choice)
- A. Uploading
- B. Downloading
- C. Copying NE data
- D. Manual configuration
Answer: A,C,D
NEW QUESTION 25
Which of the following is the multiplexing mode of SDH?
- A. Flexible mapping and asynchronous multiplexing
- B. Flexible mapping
- C. Flexible mapping and synchronous multiplexing
- D. Asynchronous multiplexing
Answer: C
NEW QUESTION 26
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. All of the above
- B. Unidirectional path protection ring
- C. Bidirectional MSP ring r
- D. SNCP ring
Answer: C
NEW QUESTION 27
The error correction capability of FEC is measured with the encoding gain. Which of the following statements about the encoding gain is incorrect?
- A. When the BER is constant, the OSNR saved by the correction encoding is called encoding gain.
- B. The encoding gain of the inband FEC is larger than that of the outband FE
- C. The encoding gain of AFEC is larger than that of FE
- D. The error correction capability of FEC increases with the encoding gain.
Answer: B
NEW QUESTION 28
Which of the following statements about clock sources is incorrect?
- A. Internal clock sources have the lowest priority because of their low precision.
- B. The same SSM protocol is selected for all NEs in a clock protection subnet.
- C. If the standard SSM protocol is enabled, you need to set the clock source ID.
- D. Generally, tributary clocks are not used as the clock sources of devices.
Answer: C
NEW QUESTION 29
Which of the following is the meaning of SFD in the Ethernet frame structure?
- A. Preamble
- B. Frame check sequence
- C. Start frame delimiter
- D. Payload
Answer: C
NEW QUESTION 30
Which of the following statements about the definition of SDH is correct?
- A. A hierarchy that can be used for asynchronous digital transmission
- B. A hierarchy of standardized digital signals that can be asynchronously cross-connected
- C. A complete standard digital signal hierarchy that provides synchronous digital transmission, multiplexing, and cross-connection
- D. A hierarchy of standardized digital signals that can be asynchronously multiplexed
Answer: C
NEW QUESTION 31
The number of 0DU2e signals multiplexed into an 0DU3 signal is the same as that of 0DU2 signals multiplexed into an 0DU3 signal.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 32
The SL64 board can be used in an OSN 2500.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 33
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. MSBBE
- B. HPFEBBE
- C. RSBBE
- D. HPBBE
- E. MSFEBBE
- F. RSFEBBE
Answer: A,B,C,D
NEW QUESTION 34
Which of the following statements about the MST functional module are correct? (Multiple Choice)
- A. The MST is both the source and sink of the MS.
- B. The MST implements the BIP-8 statistics calculation of the B2 byte.
- C. The MST returns bit error information, but not the specific number of bit errors.
- D. The MST provides the E2 orderwire channel.
Answer: A,D
NEW QUESTION 35
Optical fiber loss includes the bending loss, absorption loss, and scattering loss.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 36
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