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Share some HCNA-Transmission H31-311-ENU exam questions and answers below.
Dispersion coefficient is the delay inequality generated by optical wavelength signal in the unit wavelength interval through the unit length of optical fiber, then which of the following is unit of the dispersion coefficient?
A. ps/nm
B. ps/km
C. ps/nm.km
D. ps/km.nm
Answer: C
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
Physical port: also known as the MAC port, it is the external port of the board.
A. True
B. False
Answer: A
Compared with the traditional SDH and SONET equipment, which of the following advantages does OTN have? (Multiple choice)
A. by wavelength division functions meet the demand of each light Tb/s transmission bandwidth
B. Provide 2.7Gb/s, 10.7Gb/s, 43Gb/s or even 111.8Gb/s high-speed interface
C. Provide TCM connection monitoring with up to 5 level nested overlaps
D. Support virtual concatenation transmission mode to improve and optimize the network structure
E. provide a strong out-of-band FEC function, effectively guarantee the line transmission performance
Answer: ABDE
Which of the following statement about optical amplifiers and regenerators are correct? (Multiple choice)
A. regenerator cost is higher
B. regenerator works at the occasion of a specific bit rate and in a specific frame format
C. amplifier can work at the occasion of any bit rate and frame format
D. Optical amplifier is less used, the regenerator is used universally
Answer: ABC
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
Which of the following is the adjustment unit of the AU-PTR?
A. One byte
B. Two bytes
D. Three bytes
E. Four bytes
Answer: C
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
Which of the following description about MPLS is not correct? (Multiple choice)
A. MPLS: Multi-protocol Label Switching, a non-standardized routing and switching technology platform
B. P/PE: P (Provider) is an MPLS network internal node, PE (Provider Edge) for the MPLS network edge
C. PE->P operates as Egress, and the MPLS label is added to the client signal
D. P->P operates as Ingress and exchanges MPLS labels
Answer: ACD
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
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