H31-311_V2 5 HCIA-Transmission V2 5 Exam Dumps

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Exam : H31-311_V2.5
Title :
https://www.passcert.com/H31-311_V2.5.html
HCIA-Transmission V2.5
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1.FAS is the frame alignment overhead, the length is 6 bytes, located in the first row, column 1~6, the
first~3 bytes are 3 OA1 bytes, and each OA1 is always "1111 0110", that is, 16 F6 in hexadecimal; the 4th
to 6th bytes are 3 OA2 bytes, and each OA2 is always "0010 1000", that is, 28 in hexadecimal.
A. True
B. False
Answer: A
2. The LDG supports electrical layer scheduling at the ODU1 level.
A. True
B. False
Answer: B
3. The number of network elements (including REG) in the two-fiber bidirectional multiplex section sharing
protection ring can exceed 16.
A. True
B. False
Answer: A
4. In Ethernet, the frame length has a lower limit, which is mainly due to which of the following
considerations.
A. Carrier sense
B. Multi-point access
C. Conflict detection
D. Improve network bandwidth utilization
Answer: C
5. When the PM segment of the ODUk generates seriously errored seconds, the network management
will report the ODUk_PM_ES alarm.
A. True
B. False
Answer: B
6. If a network port that supports auto-negotiation is connected to a network port that does not support
auto-negotiation, half-duplex to full-duplex may occur.
A. True
B. False
Answer: A
7. Which of the following options are in the low-loss area of single-mode fiber? (Multiple choice)
A. 1310nm
B. 900nm
C.1550nm
D.1200nm
Answer: AC
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8. What are the following steps for low-speed services to be multiplexed into high-speed SDH services?
(multiple choice)
A. Mapping
B. Overhead Insertion
C. Positioning
D. Multiplexing
Answer: ACD
9. OSN 3500 branch line business has strong up and down capabilities, with 16 branch line outlet slots,
504 2M, 32 E4, 117 E3/DS3, 132 STM-1e, providing STM-1/4/ 16/64 group rate.
A. True
B. False
Answer: A
10. The levels of forced switching, fiber cut switching, manual switching, and practice switching are
arranged from high to low.
A. True
B. False
Answer: A
11. Physical port: also known as MAC port, is the external port of the board.
A. True
B. False
Answer: A
12. Which of the following is not included in the basic architecture of MPLS L2VPN.
A. AC
B. VC
C. Tunnel
D. S-VLAN
Answer: D
13. If a bit error is detected in the B1 byte, which of the following alarms will be reported by the peer end.
A. MS-AIS
B. RS-BBE
C. RS-FEBBE
D. Not reporting
Answer: D
14. For the OSN6800 device, which of the following slots does not have an electrical layer crossover
backplane bus?
A. Slot1
B. SIot9
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C. SIot10
D. SIot17
Answer: D
15. Complex traffic classification refers to classifying packets according to the ToS (Type of Service) field
of IP packets, user priority or EXP field of MPLS packets to identify traffic with different priority
characteristics.
A. True
B. False
Answer: B
16. The communication network can be divided into local area network and wide area network according
to the geographical scope it covers, and a metropolitan area network between the local area network and
the wide area network. The wide area network is characterized by low delay, high data rate and reliable
transmission.
A. True
B. False
Answer: B
17. The advantages of WDM mainly include the following. (multiple choice)
A. Large capacity, "transparent" transmission of data
B. The system is easy to upgrade, and the existing investment can be protected to the greatest extent
when upgrading
C. Can fully replace SDH equipment
D. Compatible with future all-optical switching networks
E. High networking flexibility, economy and reliability
Answer: ABDE
18. The dispersion coefficient is the delay difference caused by the optical wavelength signal passing
through the unit length of optical fiber in the unit wavelength interval, so which of the following is the unit
of the dispersion coefficient? ()
A. ps/nm
B. ps/km
C.ps/nm.km
D.ps/km.nm
Answer: C
19. When inserting LCK to the ODUk signal at the local end, what processing will the downstream station
system not perform?
A. Report ODUk_PM_LCK alarm
B. Download ODUk_AIS information
C. Return ODUk_PM_BDI
D. Insert ODUk_PM_LCK alarm
Answer: D
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20. Pointer adjustment is related to which of the following.
A. The clock
B. Speed
C. Expenses
D. Scrambling
Answer: A
21. Which of the following statements about reuse is correct?
In the process of byte interleaved multiplexing, the information payload and pointer bytes of each frame
are interleaved and multiplexed according to the original value, and the segment overhead is also
multiplexed accordingly.
A. There will be 4 times the overhead in STM-1 in STM-4
B. The overhead in STM4 is newly integrated and has only one set of overhead
C. The amount of overhead in STM-4 is the same as in STM-1
D. Overhead random generation in STM-4
Answer: B
22. The U2000 client supports installation on Windows, Solaris and SUSE Linux operating systems.
A. True
B. False
Answer: B
23. The optical monitoring channel is set up for the monitoring of the WDM optical transmission system.
ITU-T recommends that the wavelength of 1510nm is preferred, and the capacity is 2MHz/s.
A. True
B. False
Answer: B
24. The half-duplex mode must have a collision detection and avoidance mechanism to avoid the
situation where multiple devices seize the line at the same time. This mechanism is the so-called
CSMA/CD, and the Chinese name is carrier sense multiple access/collision detection .
A. True
B. False
Answer: A
25. The current sparse wavelength division multiplexing system generally works in the band from 1271nm
to 1611nm. Which of the following is the channel spacing?
A. 10nm
B. 5nm
C. 20nm
D. 18nm
Answer: C
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26. Compared with traditional SDH and SONET equipment, which of the following advantages does OTN
have? (multiple choice)
A. Meet the transmission bandwidth requirements of each optical Tb/s through the wavelength division
function
B. Provide 2.7Gb/s, 10.7Gb/s, 43Gb/s and even 111.8Gb/s high-speed interface
C. Provide up to 5 levels of nested overlapping TCM connection monitoring
D. Support virtual concatenation transmission mode to improve and optimize the network structure
E. Provide powerful out-of-band FEC function, which effectively guarantees the line transmission
performance
Answer: ABDE
27. The most effective subnet mask for a point-to-point WAN link is 255.255.255.252.
A. True
B. False
Answer: A
28. OSN 7500 supports a maximum of 2M service boards. Which of the following is correct.
A.1
B.2
C.3
D.4
Answer: D
29. Which of the following alarms is not a switching condition for a two-fiber bidirectional multiplex section
protection ring?
A. R_LOS
B. MS_AIS
C. TU_AIS
D. B2_EXC
Answer: C
30. Which of the following are the main functions of the U2000 network management? (multiple choice)
A. Topology management
B. Performance management
C. Troubleshooting
D. End-to-end business management
Answer: ABD
31. Both QinQ and MPLS can provide users with L2 VPN services, but QinQ is cheaper and easier than
MPLS.
A. True
B. False
Answer: A
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32. Which of the following descriptions of MPLS is incorrect. (multiple choice)
A. MPLS: Multi-protocol Label Switching, a non-standardized routing and switching technology platform
B. P/PE: P (Provider) is the internal node of the MPLS network, and PE (Provider Edge) is the edge of the
MPLS network
C. The operation of PE->P is Egress, adding MPLS labels to client signals
D. The operation of P->P is Ingress, whichexchanges MPLS labels
Answer: ACD
33. Which of the following is the database used by U2000 on PC/WIN2003?
A. Sybase
B.Microsoft SQL Server 2000
C. Foxpro
D. DB2
Answer: B
34. Which of the following is correct for optical amplifiers and regenerators? (multiple choice)
A. Higher regenerator cost
B. When the regenerator works at a specific bit rate and a specific frame format
C. Where the amplifier can work at any bit rate and frame format
D. Optical amplifiers are rarely used, and regenerators are commonly used
Answer: ABC