H31-321 Questions And Answers


Exam Name: Huawei Certified Network Professional-MSTP Transmission

Updated: 2022-05-16

Q & A: 150

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Question No : 1

When dual BITS is configured, if two clock sources have the same level, then what will happen after clock protection switching?
A. Network element can not track the clock
B. Clock protection switching occurs frequently
C. Network element reports alarm of clock signal loss
D. The generation of pseudo-synchronization phenomenon
Answer: D

Question No : 2

SNCP protection mechanism is the "Received double election." For the SNCP ring and SCNP ring, cross-ring business in the tangent point needs to be selected and then dual-transmitter, in theory, for the two-way cross-ring business at the tangent point, we have to configure four pairs of dual-transmitter,4 pairs of selective transceiver business.
A. True
B. False
Answer: B

Question No : 3

About clean dust screen, which is correct? (Multiple choice)
A. General dust screen can be directly pulled out
B. Paste the sponge on the dust shield can not be torn directly after the water rinse
C. After the cleaning process is complete, reattach the sponge to the dust shield
D. Cleaning the dust screen is usually 6 months at a time.
Answer: AC

Question No : 4

Which of the following description about the equipment loopback operation is wrong?
A. Software loopback: through the network management, the command line setup loopback
B. Hardware loopback: use the pigtail, self-loop cable for loopback operation on the optical interface, electrical port
C. The optical/electrical interface location of loopback in software and loopback in hardware are the same, while the signal flow is the same
D. The software loopback is automatically relieved in 5 minutes, and some of the boards do not support software loopback
Answer: C

Question No : 5

SNCP ring and SNCP ring intersection networking, any one intersection point network elements failure or any two fiber-broken, the business can be protected.
A. True
B. False
Answer: B

Question No : 6

Outbound subnet business refers to the physical topology is the ring chain, the business node from the ring to reach the node on the chain.
A. True
B. False
Answer: B

Question No : 7

In ECC communication model, the media access layer is responsible for the establishment and maintenance of MAC connection between adjacent network elements, where the MAC refers to the physical MAC address of the network element.
A. True
B. False
Answer: B

Question No : 8

Which of the following protocols is used to set up and delete an LSP in an ASON network?
Answer: C

Question No : 9

NG-SDH equipment, if there is no alarm on the current port, you can set the alarm inversion on the port. The mode is manual recovery mode.
A. True
B. False
Answer: A

Question No : 10

Which of the following is the TU-PTR pointer value in the case of no frequency difference and phase difference?
A. 0
B. 70
C. 522
D. 32
Answer: B

Question No : 11

From path forming conditions, path end in the sub-board or subnet optical port or virtual network element, but the OSN1500/2500/3500 5.0 platform without subnet optical port concept.
A. True
B. False
Answer: B

Question No : 12

TU pointer adjustment is converted from the AU pointer adjustment.
A. True
B. False
Answer: A

Question No : 13

For the extended SSM protocol, clock ID setting principles. Which of the following statement is true? (Multiple choice)
A. All external BITSs are assigned a clock ID
B. All internal clock sources with external BITS nodes are assigned a clock ID
C. All the nodes internal clock sources that enter into another ring network from the chain or the ring network are assigned a clock ID
D. All the nodes that enter into another ring network from the chain or the ring network, If there is a ring line clock source in the clock trace level, the line clock source of the incoming ring should be assigned a clock ID, for example, the clock ID is set to 16.
Answer: ABC

Question No : 14

Which of the following are possible reasons of TPS protection switching failure? (Multiple choice)
A. Protection group parameter configuration is wrong
B. Protect the board from failure
C. Intersection board failure
D. Main control board failure
Answer: ABC

Question No : 15

Which one of the following is the default network elements user name when creating network elements on the OptiX OSN 3500 line single station measurement using the NMS network management (U2000)?
A. admin
B. root
C. szhw
D. Ict
Answer: B
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