H31-311 Questions And Answers


Exam Name: Huawei Certified Network Associate-Transmission

Updated: 2019-01-19

Q & A: 262

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Question No : 1

MPLS is a label forwarding technology, which of the following is the original design purpose?
A. Improve the IP address usage rate
B. Improve the forwarding speed of the router
C. Reduce the time delay of the network
D. Avoid broadcast storms
Answer: B

Question No : 2

Which of the following does the advantage of WDM mainly include? (Multiple choice)
A. Large capacity, the data "transparent" transmission
B. System upgrade easy, upgrade can maximally protect existing investments
C. can fully replace the SDH equipment
D. Compatible with future all-optical switching networks
E. High degree of networking flexibility, economy and reliability
Answer: ABDE

Question No : 3

Half-duplex mode must have a collision detection and avoidance mechanism, to avoid multiple devices at the same time to grab the line, this mechanism is called CSMA/CD, the Chinese name is carrier sense multiple access/collision detection.
A. True
B. False
Answer: A

Question No : 4

FAS is the frame alignment overhead, the length of 6 bytes, in the 1st to 6th column of the first line , 1 to 3 bytes are three OA1 bytes, each OA1 constant for the "1111 0110", that is, hexadecimal F6; 4 to 6 bytes are three OA2 bytes, each OA2 constant for "0010 1000", that is, the hexadecimal 28.
A. True
B. False
Answer: A

Question No : 5

The level of mandatory switching, fiber cut switching, manual switching, practice switching is arranged from high to low.
A. True
B. False
Answer: A

Question No : 6

Both QinQ and MPLS can provide users with L2 VPN services, but QinQ is cheaper and simpler than MPLS.
A. True
B. False
Answer: A

Question No : 7

All bytes in the SDH frame structure will be scrambled.
A. True
B. False
Answer: B

Question No : 8

Which of the following options are not included in the basic architecture of MPLS L2VPN?
C. Tunnel
Answer: D

Question No : 9

The current coarse wavelength division multiplexer system generally work in from 1271nm to 1611nm band, which of the following is the channel interval?
A. 10nm
B. 5nm
C. 20nm
D. 18nm
Answer: C

Question No : 10

The number of Network Elements (including REG) of two-fiber bidirectional multiplex section in a shared ring can exceed 16.
A. True
B. False
Answer: A

Question No : 11

Which of the following options is the low-loss area of the single-mode fiber? (Multiple choice)
A. 1310nm
B. 900nm
C. 1550nm
D. 1200nm
Answer: AC

Question No : 12

R-LOS, R-LOF, AU-AIS, TU-AIS alarms are generated on the circuit board and reported.
A. True
B. False
Answer: B

Question No : 13

When the PM segment of the ODUk generates a serious errored second, the network administrator will report ODUk_PM_ES alarm.
A. True
B. False
Answer: B

Question No : 14

For OSN6800 equipment, which of the following slots does not have an electricity layer backplane bus?
A. Slot1
B. SIot9
C. SIot10
D. SIot17
Answer: D

Question No : 15

Complex flow classification refers to classifying packets according to the ToS (Type of Service) field of the IP packet, the user priority, or the EXP field of the MPLS packet, to identify the flow with different priority characteristics.
A. True
B. False
Answer: B
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03 Jan, 2019

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28 Sep, 2018

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