H31-311 Practice Exam Tests Latest Updated on Sep-2021
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NEW QUESTION 114
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. G1
- B. M1
- C. N1
- D. S1
Answer: D
NEW QUESTION 115
For 100G (112 Gbit/s) signals, the actual data baud rate is only 28G baud.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 116
Which of the following statements about the definition of SDH is correct?
- A. A hierarchy of standardized digital signals that can be asynchronously cross-connected
- B. A complete standard digital signal hierarchy that provides synchronous digital transmission, multiplexing, and cross-connection
- C. A hierarchy of standardized digital signals that can be asynchronously multiplexed
- D. A hierarchy that can be used for asynchronous digital transmission
Answer: B
NEW QUESTION 117
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 118
Which of the following methods can be used to multiplex lower-order ODUk to higher-order ODUk?
- A. Frequency division multiplexing
- B. Space division multiplexing
- C. Time division multiplexing
- D. Wavelength division multiplexing
Answer: C
NEW QUESTION 119
The last 256 columns in the OTN frame structure are FEC areas, which are used for forward error correction.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 120
Which of the following alarms does not trigger the AU-AIS alarm?
- A. AU-LOP
- B. MS-AIS
- C. B2-EXC
- D. R-LOS
Answer: A
NEW QUESTION 121
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. SNCP ring
- C. Unidirectional path protection ring
- D. Bidirectional MSP ring r
Answer: D
NEW QUESTION 122
Linear MSP (LMSP) has two modes; 1+1 and 1:1. Extra services can be configured for the protection channel only in the 1:1 mode of LMSP.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 123
Which of the following layers defines the protocols that control the network layer? The protocols of the layer work on logical links, that is end-to-end connections between two devices.
- A. Transport layer
- B. Network layer
- C. Data link layer
- D. Application layer
Answer: A
NEW QUESTION 124
When severely errored seconds (SESs) are present in the PM section at the ODUk layer, which of the following alarms is reported on the NMS?
- A. ODUk_PM_SESR
- B. ODUk_PM_SES
- C. ODUk _PM _UAS
- D. ODUk_PM_ES
Answer: B
NEW QUESTION 125
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 126
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 127
When the rate of an SNCP ring consisting of four OptiX OSN 2500 devices is 2.5 Gbit/s, the service capacity of this network can carry a maximum number of ( ) 2 Mbit/s signals.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 128
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 129
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 130
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