Latest H31-311 Exam Dumps Huawei Exam from Training Expert TestSimulate
Pass Huawei Huawei HCIA-Transmission V2.0 Exam PDF Dumps | Recently Updated 190 Questions
Huawei H31-311 Exam Syllabus Topics:
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NEW QUESTION 25
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. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 26
When the lower-order resources of a device are insufficient, which of the following measures can be taken? (Multiple Choice)
- A. Configure VC4 services.
- B. Configure a VC4 server trail.
- C. Combine available lower-order resources.
- D. Use a cross-connect board with a larger lower-order cross-connect capacity.
Answer: A,C,D
NEW QUESTION 27
Which of the following is the meaning of "L" in the optical module parameter "L-64.2"?
- A. Transmission distance
- B. Transmit wavelength
- C. Receive wavelength
- D. Dispersion coefficient
Answer: A
NEW QUESTION 28
Which of the following is the default WTR time for MSP switching?
- A. 12 minutes
- B. 10 minutes
- C. 6 minutes
- D. 15 minutes
Answer: B
NEW QUESTION 29
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. TRUE
- B. FALSE
Answer: A
NEW QUESTION 30
Which of the following are the steps for multiplexing low-speed services into high-speed SDH services?
(Multiple Choice)
- A. Alignment
- B. Mapping
- C. Multiplexing
- D. Overhead insertion
Answer: A,B,C
NEW QUESTION 31
On a Layer 2 switching device, if the Ethernet port is an Access port, the port can receive only the Ethernet frames without VLAN tags or Ethernet frames with the same VLAN ID as the default VLAN ID of the port.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 32
The backplane has two -48 V power supply cables, and each board obtains two -48 V power supplies from the backplane. After the power supplies are combined by diodes, various voltages required by each component are obtained through the DC/DC power module and linear conversion.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 33
On the OSN series transport devices, Ethernet ports cannot access tagged frames and untagged frames at the same time,
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 34
Which of the following is the frame whose VC-4 J1 byte is indicated by the current frame's AU pointer?
- A. None of the above
- B. Current frame
- C. Previous frame
- D. Next frame
Answer: D
NEW QUESTION 35
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 36
When the ACT indicator of an SDH board is off, it indicates that this board has a hardware fault and cannot be used,
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 37
Both PDH and SDH have globally unified standards.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 38
MAC loopback and PHY loopback are used for fault locating. When the MAC loopback is set to an inloop, you can set the PHY loopback according to the actual situation.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 39
The Erbium Doped Fiber Amplifier (EDFA) is a key component of the new-generation optical communication system. Which of the following are the features of the EDFA? (Multiple Choice)
- A. Amplification of any wavelengths
- B. Low noise index
- C. High gain
- D. High output power
Answer: B,C,D
NEW QUESTION 40
In the SDH optical synchronous transmission system, which of the following bytes is used to transmit the quality and usage information of clock sources?
- A. N1
- B. M1
- C. S1
- D. G1
Answer: C
NEW QUESTION 41
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 42
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 43
Which of the following is not a condition for triggering multiplex section protection (MSP)?
- A. The MS-AIS signal is detected.
- B. AU-AIS is detected.
- C. R-LOF is detected.
- D. R-LOS is detected.
Answer: B
NEW QUESTION 44
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 45
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. TRUE
- B. FALSE
Answer: A
NEW QUESTION 46
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 47
Which of the following bytes in the regenerator section overhead are associated with R-OOF and R-LOF?
(Multiple Choice)
- A. A2
- B. B1
- C. B2
- D. A1
Answer: A,D
NEW QUESTION 48
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