H31-311 Free Certification Exam Material from ExamBoosts with 190 Questions
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NEW QUESTION 71
Which of the following is the basic requirement of a DWDM system on a light source?
- A. The dispersion tolerance is low.
- B. The output wavelength is stable.
- C. The transmit power is high.
- D. The direct modulation method is used.
Answer: B
NEW QUESTION 72
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. Low noise index
- B. Amplification of any wavelengths
- C. High gain
- D. High output power
Answer: A,C,D
NEW QUESTION 73
Which of the following are communication quality alarms? (Multiple Choice)
- A. No login of an NE user
- B. Optical port loopback
- C. Loss of optical signals
- D. NE communication interruption
Answer: C,D
NEW QUESTION 74
In the case of SNCP, a line board selectively receives services. Therefore, the SNCP can protect the services on the line.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 75
The SP3D board supports 63 El services.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 76
Optical fiber loss includes the bending loss, absorption loss, and scattering loss.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 77
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 78
Both PDH and SDH have globally unified standards.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 79
Which of the following are VLAN classification methods? (Multiple Choice)
- A. By MAC address
- B. By protocol
- C. By port
- D. By subnet
Answer: A,B,C,D
NEW QUESTION 80
When multiple users need to share the same VCTRUNK and use the same VLAN ID, the QinQ technology can be used.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 81
When an optical fiber between node A and node B is broken, the FIU on node B detects the OTS_LOS alarm and inserts the OTS_BDI alarm to node A.
The FIU on node A reports the OTS_BDI alarm. The line board on the downstream C node reports the OCh_SSF alarm.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 82
Which of the following bytes in the regenerator section overhead are associated with R-OOF and R-LOF?
(Multiple Choice)
- A. A2
- B. B2
- C. A1
- D. B1
Answer: A,C
NEW QUESTION 83
Which of the following is not a condition for triggering multiplex section protection (MSP)?
- A. R-LOF is detected.
- B. AU-AIS is detected.
- C. The MS-AIS signal is detected.
- D. R-LOS is detected.
Answer: B
NEW QUESTION 84
When setting the LCAS mode, follow the following principles:
1. If devices at the two ends are both Huawei devices, set them to the "Standard Mode".
2. If a Huawei device is interconnected with a third-party device, set the interconnected devices to the same mode according to the mode supported by the third-party device.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 85
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. MS-AIS
- B. R-LOS
- C. MS-RDI
- D. R-LOF
Answer: A,B,D
NEW QUESTION 86
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 87
In a WDM system, using a dielectric thin film filter (TFF) is ideal when fewer than ( ) wavelengths are used.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 88
Configuring an EPLAN service as a ring is not recommended. If the EPLAN service is configured as a ring, the STP protocol must be enabled on the network to prevent broadcast storms.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 89
Which of the following statements about U2000 license is incorrect?
- A. The U2000 license file is named in the "xxxxxxx.dat" format.
- B. Each license file corresponds to the equipment serial number (ESN) of one U2000 computer, and therefore can be used only on the corresponding computer.
- C. Formal U2000 license varies depending on operating system platforms. You must apply for a U2000 license based on the specific operating system.
- D. Do not modify license files. Otherwise, the license files will fail.
Answer: C
NEW QUESTION 90
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. TRUE
- B. FALSE
Answer: B
NEW QUESTION 91
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