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[2021] H31-311 PDF Questions - Perfect Prospect To Go With TestBraindump Practice Exam
NEW QUESTION 22
When a working PQ1 board is faulty, the device performs TPS protection switching. Which of the following statements about the switching process are correct? (Multiple Choice)
- A. If the protection PQ1 board is normal, the cross-connect board sends a switching message to the D75S corresponding to the faulty PQ1 board through the switching control bus.
- B. The D75S board responds to the switching message by transferring services to the shared protection bus and stopping sending services to the faulty PQ1 board.
- C. The protection PQ1 board receives and processes the services that are transferred from the D75S board to the protection bus to complete the protection switching.
- D. The cross-connect board detects that the PQ1 board is faulty through the board status bus.
Answer: A,B,C,D
NEW QUESTION 23
When the U2000 data is backed up using scripts, the backup is fast because the backup files are small.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 24
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. TRUE
- B. FALSE
Answer: A
NEW QUESTION 25
Which of the following alarm/event dumping modes are supported by the U2000? (Multiple Choice)
- A. Automatic dumping
- B. Manual dumping
- C. Overflow dumping
- D. Periodic dumping of alarm logs
Answer: B,C,D
NEW QUESTION 26
Only one TCM can be used at a site.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 27
Which of the following are the electrical-layer overheads of OTN? (Multiple Choice)
- A. OPUk
- B. OTUk
- C. OCh
- D. ODUk
Answer: A,B,D
NEW QUESTION 28
Which of following are the configuration modes of new NEs? (Multiple Choice)
- A. Copying NE data
- B. Manual configuration
- C. Uploading
- D. Downloading
Answer: A,B,C
NEW QUESTION 29
Which of the following are the main advantages of SDH?
(Multiple Choice)
- A. Standard interfaces
- B. High compatibility
- C. Synchronous multiplexing
- D. Powerful OAM
Answer: A,B,C,D
NEW QUESTION 30
In the case of 1+1 linear MSP, which of the following switching modes do not require the enabling of the APS protection protocol? (Multiple Choice)
- A. Dual-ended non-revertive mode
- B. Single-ended revertive mode
- C. Single-ended non-revertive mode
- D. Dual-ended revertive mode
Answer: B,C
NEW QUESTION 31
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 32
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. MSFEBBE
- C. HPBBE
- D. HPFEBBE
- E. RSBBE
- F. RSFEBBE
Answer: A,C,D,E
NEW QUESTION 33
The U2000 can be flexibly interconnected with different third-party NMSs through northbound interfaces (NBIs), and provides information about physical inventory and alarms to the upper-layer NMSs.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 34
Which of the following maintenance signals is transmitted from a downstream site to an upstream site in OTN?
- A. BDI
- B. IAE
- C. LCK
- D. ATS
Answer: A
NEW QUESTION 35
The pointer is used for alignment and indicates the start position of VC-n in the corresponding AU or TU frame. In this way, the receive end can correctly remove the corresponding VC from the STM-N, and then split the VC and C encapsulation to separate low-rate signals, such as PDH. That is, low-rate tributary signals can be directly dropped from the STM-N signal.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 36
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 37
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 38
Which of the following is the meaning of SFD in the Ethernet frame structure?
- A. Start frame delimiter
- B. Preamble
- C. Frame check sequence
- D. Payload
Answer: A
NEW QUESTION 39
For the OSN 3500, there is a slot mapping relationship between processing boards and interface boards. The processing board in slot 1 maps to the interface board in slot 19-20.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 40
After PDH services are configured on a per-NE basis, a complete trail cannot be searched out. Which of the following are possible causes? (Multiple Choice)
- A. Pass-through is not configured at intermediate sites.
- B. Line board selection is incorrect.
- C. Timeslot configuration is incorrect.
- D. Tributary board selection is incorrect.
Answer: A,B,C
NEW QUESTION 41
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