Updated H31-311_V2.5-ENU Exam Questions – Latest Study Materials for HCIA-Transmission V2.5 Exam Preparation

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1. After the network sends a fiber cut, which of the following alarms does not appear in a 1+1 linear multiplex section protection configuration?

R_LOS

APS_INDI

MS_APS_INDI_EX

HP_LOM

Question 1 of 33

2. Which type of board does TQM belong to?

Branch board

Circuit board

Branch line integrated board

Optical Amplifier

Question 2 of 33

3. PWE3 is a Layer 2 service bearer technology that can simulate the basic behavior and characteristics of which of the following services as realistically as possible in a packet switching network (PSN)?

ATM

Ethernet

TDM

All of the above

Question 3 of 33

4. MPLS technology can be nested in multiple layers without any restrictions, and is only limited by (), which has good scalability. Which of the following is correct?

VLAN

Ethernet message length

Processing power of the device

Latency Issues

Question 4 of 33

5. What are the corresponding alarm objects of PWRA, PWRB, and PWRC on the SSN1GSCC board? Which of the following options is correct?

A-48V power indicator light B-48V power indicator light System +3.3V backup power indicator light

A-48V power indicator B-48V power indicator System +5.0V backup power indicator

-48V power indicator light system +5.0V backup power indicator light system +3.3V backup power indicator light

-48V power indicator light system +3.3V backup power indicator light system +5.0V backup power indicator light

Question 5 of 33

6. Which of the following descriptions of ODUk_PM_BDI is correct?

ODUk PM signal degradation

BIP8 bit error exceeds the limit in the ODUk PM segment

ODUk PM backward trap indication

ODUk PM open connection indication

Question 6 of 33

7. Which of the following networking forms supports additional service configuration?

1:N linear multiplex section

1+1 linear multiplex section

SNCP protection

PP ring protection

Question 7 of 33

8. The receiving end performs BIP-8 check on the received STM-16 frame before descrambling. The result of XOR with the B1 byte of the next STM-16 frame received is 10001100. This means that several error blocks have occurred in the STM-16 frame. Which of the following options is correct?

Question 8 of 33

9. Which of the following descriptions of the electrical layer multiplexing phase mapping steps of ODU0 is wrong?

After mapping and multiplexing, two DDU0 signals can be multiplexed into one OTU1[V] signal.

After mapping and multiplexing, 8 ODU0 signals can be multiplexed into 1 0TU2V VI signal.

After mapping and multiplexing, 34 0DU0 signals can be multiplexed into 1 OTU3[VM signal

80 0DU0 signals are mapped and multiplexed, and finally multiplexed into 1 OTU4 signal

Question 9 of 33

10. When which of the following situations occurs, the network management will report the ODUk_PM_DEG alarm?

The ODU layer, i.e., M, sets the bit error limit. When the number of bit errors exceeds the specified bit error excess threshold

The PM segment of the ODU layer has bit error degradation, and the number of bit errors exceeds the specified bit error degradation threshold

The ODUk TCM layer signal is degraded and the number of bit errors exceeds the specified excessive bit error threshold

The ODUk TCM layer bit error exceeds the limit, and the number of bit errors exceeds the specified bit error degradation threshold

Question 10 of 33

11. Which of the following VLAN numbers can be provided by QINQ technology?

4095*4095

4096*1024

4096

1024*1024

Question 11 of 33

12. Which of the following descriptions about the slot settings of the OSN 6800 subrack is wrong?

IU19 and IU20 are fixed for inserting the power access board PIU. Each PIU can independently support the sub-rack power supply.

U9 and IU10 slots can be used for cross-connection boards XCS. Each XCS can independently support cross-connection of all services between slots.

When the IU17 slot is not configured with SCC, the OTU board can be inserted to provide service cross-connection function

Slots IU17 and IU18 can be used for the main control board SCC. Each SCC can independently support subrack management

Question 12 of 33

13. Four network elements form an STM-4 bidirectional multiplex section protection ring. Which of the following is the maximum service capacity of the network?

1008 2M

504 2M

252 2M

63 2M

Question 13 of 33

14. Which of the following adjustments will cause the information payload area to carry the most information payload?

Positive adjustment

Negative Adjustment

Adjustment

NDF reversal

Question 14 of 33

15. Which of the following overhead does not belong to ODUk overhead?

TCM

NJO

APS/PCC

Question 15 of 33

16. When setting the monitoring time for network element performance events, which of the following should the time be set to?

Slightly later than the current time

Keep the same time as the previous time of the network element

Earlier than the current time

Random settings

Question 16 of 33

17. To which of the following levels does the U2000 network management belong?

Network-level management system

Subnet-level management system

Network element level management system

Regional level management system

Question 17 of 33

18. Which of the following is not an advantage of using QinQ technology?

Solve the problem of increasingly scarce public network VLAN ID resources

Provide a simpler Layer 2 VPN solution

Different services can be distinguished by different levels of VLAN ID:

Solve the packet transmission delay problem

Question 18 of 33

19. A 2.2m cabinet can accommodate up to which of the following OSN 2500 sub-racks?

Question 19 of 33

20. The negative adjustment position of the TU pointer is at which of the following bytes?

Question 20 of 33

21. RAMAN amplifier utilizes which of the nonlinear effects?

Self-Phase Modulation

Dispersion

Raman scattering

Four-wave mixing

Question 21 of 33

22. Which of the following reasons will not cause the network management to report a MUT_LOS alarm?

OTU board failure

DMUX board out port failure

The pigtail connecting the DMUX board out port and the OA board in port is faulty.

OA board in port failure

Question 22 of 33

23. What is the function of the overhead TCM in ODUk?

Channel monitoring unlocking

Path Trace Identifier Overhead

Tandem connection monitoring overhead

General communication channel overhead

Question 23 of 33

24. In terms of protection capability, which of the following topologies has the strongest protection capability?

Linear topology

Star topology

Tree topology

Ring topology

Mesh topology

Question 24 of 33

25. Which of the following descriptions about the FIU board is correct?

The FIU board processes monitoring information.

FIU can complete the access and extraction of OSC channels.

In the OptiX OSN8800 equipment, when there is no signal input, the FIU board will report an alarm.

Whether it is an OLA station or an OADM station, one station only needs one FIU.

Question 25 of 33

26. Which of the following boards supports QinQ function?

EFT8

EGT2

EMS4

EMR2

Question 26 of 33

27. Which of the following statements is wrong?

In the MPLS VPNE connection model, the network consists of the operator's backbone network and the user's various sites. The so-called VPN is the division of a set of sites. One VPN corresponds to a set of several sites.

The network construction of MPLS VPN is completed by the service provider. In this network construction, the service provider provides VPN services to users, and users do not feel the existence of the public network, as if they have independent network resources.

The backbone routers within the service provider's backbone network, that is, the routers that are not directly connected to the edge routers, are unaware of the existence of the VPN and are only responsible for data transmission within the backbone network.

All VPN construction, connection and management are performed on backbone routers.

Question 27 of 33

28. MPLS is a label forwarding technology. Which of the following was its original design purpose?

Improve the utilization rate of P addresses

Increase the forwarding speed of the router

Reduce network latency

Avoid broadcast storms

Question 28 of 33

29. Which of the following databases is used by U2000 on PC/WIN2003?

Sybase

Microsoft SQL Server 2000

FoxPro

DB2

Question 29 of 33

30. The current sparse wavelength division multiplexing system generally operates in the band from 1271nm to 1611nm. Which of the following is the channel spacing?

10nm

5nm

20nm

18nm

Question 30 of 33

31. Which of the following descriptions about multiplexing is correct? During byte interleaving multiplexing, the information payload and pointer bytes of each frame are interleaved and multiplexed according to the original values, and the segment overhead is also multiplexed accordingly.

STM-4 has 4 times the overhead of STM-1

The overhead in STM4 is newly integrated into only one set of overhead

The overhead number in STM-4 is the same as that in STM-1

Random generation of overhead in STM-4

Question 31 of 33

32. Which of the following alarms is not a switching condition for a two-fiber bidirectional multiplex section protection ring?

RLOS

MS_AIS

TU_AIS

B2_EXC

Question 32 of 33

33. The multi-frame loaded 2M signal is the information of which time period?

500us

125us

500ms

125ms

Question 33 of 33

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