H31-311 Braindumps PDF, Huawei H31-311 Exam Cram
New 2021 H31-311 Sample Questions Reliable H31-311 Test Engine
Huawei H31-311 Exam Syllabus Topics:
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NEW QUESTION 64
The number of 0DU2e signals multiplexed into an 0DU3 signal is the same as that of 0DU2 signals multiplexed into an 0DU3 signal.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 65
The fiber core refractive index n1 must be ( ) the cladding layer refractive index n2, which is a necessary condition for transmitting optical signals in optical fibers.
- A. equal to
- B. higher than
- C. lower than
Answer: B
NEW QUESTION 66
Automatic laser shutdown (ALS); When no optical signal is received, the ALS function automatically shuts down the corresponding optical module. This function protects onsite maintenance personnel.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 67
For an OSN 3500, which of the following boards provides the centralized backup function for the +3.3 V power supply of each board in the subrack?
- A. COA
- B. AUX
- C. PIU
- D. SCC
Answer: B
NEW QUESTION 68
An optical amplifier unit compensates for line loss and extends transmission distance. Connecting multiple optical amplifier units in cascading mode can infinitely extend transmission distance of a system.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 69
Optical supervisory channels are intended for the supervisory of WDM optical transmission systems. In ITU-T recommendations, 1510 nm wavelengths at a ( ) rate are preferentially used.
- A. 64 kbit/s
- B. 2Mbit/s
- C. 192 kbit/s
- D. 576 kbit/s
Answer: B
NEW QUESTION 70
When a VLAN-based service type is configured, which of the following functions must be enabled on the port?
- A. Flow control
- B. Entry detection
- C. Auto-negotiation mode
- D. Broadcast packet suppression
Answer: B
NEW QUESTION 71
In the system control unit, which of the following databases do not lose data after a power failure?
- A. FDB1
- B. DRDB
- C. MDB
- D. FDB0
Answer: B,C,D
NEW QUESTION 72
Which of the following device domains can be managed by the U2000? (Multiple Choice)
- A. Wireless device
- B. Access device
- C. Data communication device
- D. Transport device
Answer: A,B,C,D
NEW QUESTION 73
Which of the following statements about OTN advantages is incorrect?
- A. OTN provides powerful outband FEC functions to effectively guarantee the line transmission performance.
- B. The WDM function is used to meet the requirement for Tbit/s bandwidth per fiber.
- C. OTN provides a maximum of five levels of nested or overlapped TCM connection monitoring.
- D. OTN provides 2.7 Gbit/s, 10.7 Gbit/s, 43 Gbit/s, and even 111.8 Gbit/s high-rate interfaces.
Answer: C
NEW QUESTION 74
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
Answer: A
NEW QUESTION 75
An unprotected chain consists of four NEs: NE1, NE2, NE3, and NE4. An end-to-end VC4 trail NE1-NE4 is created, and NE5 is added between NE2 and NE3 for capacity expansion. The original configuration remains unchanged, and no service is configured on NE5. In this case, the unprotected chain becomes NE1-NE2-NE5-NE3-NE4, and how many VC4 trails can be searched out?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 76
In an OSN 550, the CXL slot houses a functional board that integrates the system control and communication (SCC) unit, cross-connect unit, and clock unit. The functional board is available in multiple types depending on the functions and access capabilities provided by the OSN 550.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 77
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. TRUE
- B. FALSE
Answer: A
NEW QUESTION 78
In MSP networking, when optical fibers are connected between sites, the east optical board of a site is connected to the west optical board of the downstream site, and these sites are connected in sequence to form a ring. In this case, the direction from the east optical board of a site to the west optical board of the downstream site is the major ring direction, and the direction that the ring is formed is the service direction.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 79
The PRBS can be used to test whether an SDH service is normal and whether the protection switching function is normal.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 80
Which of the following technologies is the main difference between an open DWDM system and an integrated DWDM system?
- A. Wavelength conversion technology
- B. Optical supervisory technology
- C. Optical amplification technology
- D. Multiplexing/Demultiplexing technology
Answer: A
NEW QUESTION 81
OTM nr.m consists of a maximum of "n" optical multiplexing channels and does not support non-channel-associated overheads. The letter "r" indicates function reduction.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 82
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