H31-311-ENU Free Exam Questions & Answers PDF Updated on Oct-2021
Latest H31-311-ENU Exam Dumps Recently Updated 190 Questions
NEW QUESTION 103
Some of the SNCP protection switching conditions are default, such as AU-AIS and TU-AIS. Others conditions are optional, such as HP-TIM and HP-SLM. The optional conditions can be flexibly set based on service levels.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 104
Which of the following is not a non-linear effect?
- A. Self-phase modulation (SPM)
- B. Raman scattering
- C. Dispersion
- D. Four-wave mixing (FWM)
Answer: C
NEW QUESTION 105
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. FALSE
- B. TRUE
Answer: A
NEW QUESTION 106
Assume that 2 x VC-12 timeslots need to be bound with VCTRUNK1 of the N2EFS4 board.
When 8 x VC-4 timeslots are available on the N2EFS4 board, which of the following timeslots meets the requirements?
- A. VC-12 timeslots 1 and 2 of the first VC-4
- B. VC-12 timeslots 1 and 2 of the eighth VC-4
- C. VC-12 timeslots 1 and 2 of the fourth VC-4
- D. VC-12 timeslots 33 and 34 of the second VC-4
Answer: C
NEW QUESTION 107
The working mode of a port determines the flow control mode of the port.
When the working mode is 100 Mbit/s full duplex, which of the following flow control modes can be used?
- A. None of the above
- B. Auto-negotiation flow control mode
- C. Non-auto-negotiation flow control mode
- D. Both of the above
Answer: C
NEW QUESTION 108
Which of the following statements about the 1+1 protection of cross-connect boards are correct? (Multiple Choice)
- A. Two cross-connect boards have the same configuartion. Service boards will selectively receive services from one of them based on the quality of services and status of cross-connect boards.
- B. After service cross-connections are completed, the active and standby cross-connect boards send the data of the active cross-connect board to the sink service board.
- C. The buses of the two cross-connect modules work independently and do not interfere with each other.
- D. The source service board sends services to the active and standby cross-connect boards.
- E. The sink service board can receive only the data from the active cross-connect board.
- F. The dual-bus system structure indicates that the service board performs dual feeding of data to the cross-connect side and selective receiving of the data on the cross-connect side.
Answer: A,C,D,F
NEW QUESTION 109
When a working PQ1 board is faulty, the device performs TFS protection switching.
Which of the following statements about the switching process are correct? (Multiple Choice)
- A. 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.
- B. The cross-connect board detects that the PQ1 board is faulty through the board status bus.
- C. 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.
- D. 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.
Answer: A,B,C,D
NEW QUESTION 110
Both PDH and SDH have globally unified standards.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 111
According to the formula of "ODUk rate = 239/(239-k) x STM-N frame rate", the ODU4 rate is equal to 239/235 x STM-N frame rate.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 112
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. FALSE
- B. TRUE
Answer: B
NEW QUESTION 113
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. FALSE
- B. TRUE
Answer: B
NEW QUESTION 114
Which of the following overheads is not an ODUk overhead?
- A. NJO
- B. APS/PCC
- C. TCM
- D. PM
Answer: A
NEW QUESTION 115
MSP is a network-level protection scheme. The MSP does not directly protect a service, and the MSP switching and restoration are not affected even if there is no service on the MSP ring.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 116
Which of the following factors determines that the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent After signals are transmitted for a certain distance in a WDM system, the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent.
Which of the following is the main cause?
- A. EDFAs are used.
- B. New types of optical fibers are not used.
- C. Fiber attenuation is excessively high.
- D. Multiplexers and demultiplexers are used.
Answer: A
NEW QUESTION 117
The STM-64 has ( ) AU pointers.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 118
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. FALSE
- B. TRUE
Answer: A
NEW QUESTION 119
Optical fiber loss includes the bending loss, absorption loss, and scattering loss.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 120
Which of the following device domains can be managed by the U2000? (Multiple Choice)
- A. Wireless device
- B. Transport device
- C. Data communication device
- D. Access device
Answer: A,B,C,D
NEW QUESTION 121
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