H12-931_V2.0 HCIE-Transmission Exam Free Dumps

dumps2025-06-03T09:46:09+08:00

H12-931_V2.0 is one for HCIE-Transmission certification, which covers the development of transmission network as well as solutions. There are 60 Single-answer Question, Multiple-answer Question, True or false, Short Response Item, Drag and Drop Item in real Huawei H12-931_V2.0 exam, and you have 90 minutes to answer all the questions. The required passing score is 600. The exam cost is $300. The available languages are English and Chinese. We provide the latest Huawei H12-931_V2.0 exam dumps, which can ensure you pass the test easily. Free HCIE-Transmission H12-931_V2.0 exam dumps are available below.

Page 1 of 18

1. When LOATOA/THA/TOMTOG and other single board services are activated, the client-side interface of this end reports a SYNC alarm. What is the reason?

The client-side interface on this end receives light abnormally, and the client-side interface on the other end receives light abnormally

The client-side interface on this end receives light normally, but the client-side interface on the other end receives light abnormally

The port receives light normally, and the client-side port receives light normally

The client-side interface on this end receives light abnormally, while the client-side interface on the other end receives light normally

2. The single-fiber bidirectional optical interface of the PTN equipment distinguishes upstream and downstream business flows based on time slots.

TRUE

FALSE

3. Which of the following descriptions of the networking requirements for configuring SOM is wrong?

OSC board must be configured in the network

The outbound optical amplifier at the OMS segment must be equipped with an MCA board

An OA board must be configured between the FIU board and the ROADM board or the splitter/combiner board at the receiving end of the OMS segment

Optical amplifier boards of the same dimension can be inserted into different network elements

4. Regarding the differences between Linux and Solaris operating systems, which of the following statements is wrong?

All disks need to be recognized by the operating system, but Solaris needs to be set in the sd.conf file, while Linux does not need

Solaris itself only supports UFS hard disk file system; in Linux, there are many disk file systems to choose from, the default is ext3

In Solaris, hot-plug devices are managed through cfgadm-. In Linux, when a device is connected, the system automatically recognizes and configures the hot-plug device.

Linux comes with the fssnap command for creating and managing file system snapshots. Solaris does not have such a file system snapshot tool

5. Which of the following is not included in the performance evaluation of WDM network?

Single-wavelength optical power & flatness

OSNR

Combined optical power

Monitoring signal optical power

Dispersion & FEC BER

6. In the 40-wavelength system of wavelength division equipment, due to the aging of the customer's optical cable, the optical cable between sites 2# and 3# needs to be replaced, and a 4# optical amplifier site needs to be added between 2# and 3#. Which of the following statements are correct?

The optical power of site 2# does not need to be re-adjusted

The optical power of site 3# does not need to be re-adjusted

It is necessary to consider whether the dispersion budget is sufficient

No need to consider whether the dispersion budget is sufficient

7. Which of the following statements is wrong when creating an upgrade task?

The upgrade operator must use the "admin" level user to perform the health check, otherwise some check items will fail and reduce the check efficiency.

For gateway NEs, if you check the "If the NE to be loaded is a gateway NE, force FTP/SFTP protocol to load" configuration item, you need to configure an FTP/SFTP server on the network management server. Improve loading speed

“Force and activate.” In this mode, all groups are activated in parallel, which may cause service interruption.

Check "Use package customization. The software added by the user is a partial package. That is, it is matched according to the single board on the network element. It can improve the efficiency of adding."

8. Which of the following descriptions of ODUk SNCP protection type is wrong?

When the protection subtype is "SNC/I, there is no need to set the OTN overhead. However, when configuring this type of protection, both ends of the service must be within the range of SM overhead monitoring;

The protection subtype is "SNC/S": monitors the PM layer and needs to set the OTN overhead;

For boards that require ODUk SNCP protection and electrical cross-connection, the configuration varies depending on the selected board and customer-side services;

The ODUk SNCP protection configuration of the receiving site needs to be consistent with the ODUk SNCP protection configuration of the sending site;

9. Which of the following statements about the position of the dispersion module in the signal flow is wrong?

If there is an OAU board, the DCM is placed between the TDC/RDC of the OAU

If there is only one OBU board, the DCM is placed after the OBU

If there are two OBU boards, the DCM is placed between the two OBUs.

OTM station usually pre-fills 20KM DCM before sending OBU

10. In general, which PHB is used for signaling?

CS7, CS6

AF1, AF2, AF3, AF4

Page 2 of 18

11. A network is configured with an optical line protection group. The initial difference between the primary and standby input optical signals is 2db, and the primary and standby input optical difference switching threshold is 5db. Which of the following situations will trigger switching?

Main channel optical power minus standby channel optical power = 4db

Main channel optical power minus standby channel optical power = -4db

Main channel optical power minus standby channel optical power = -2db

Main channel optical power minus standby channel optical power = 2db

12. Network elements A, B, and C are OSN 3500s that form a chain network. The two AIC stations are connected to routers. The IPR router is connected to the OptiX SDH equipment through the STM-1 POS port. The PAS port also uses 1 and C2 bytes as payload transfer bytes (for carrying services). VC4 services are created from network element A to network element C, and VC4 is passed through network element B.

In this case, is there any alarm reported inside the SDH network?

No alarm

There is a C2 mismatch alarm

There is a J1 mismatch alarm

There is a C2 not installed alarm

13. The maximum dispersion tolerance of an OTU board is 800ps/nm. On a G.652 fiber, the dispersion-limited distance can be roughly considered to be?

40KM

60KM

80KM

10KM

14. 1NE1 is interconnected with NE2. NE1 uses OptiX SDH equipment and uses a VC4:1:2 timeslot. If the service can be opened normally, what is the VC12 timeslot number that the other end needs to use when using equipment from other manufacturers?

2-1-1

1_2_1

1_1_2

2_2_1

15. Which of the following statements about TTX board is correct?

Essentially, the TTX board is not a 100G tributary board, but it requires a single-slot 100G cross-connect capacity.

8800T64/T32 universal subrack can support TTX boards

This board is a tributary board that can access 100G client-side services

TTX can be used with NS4 to make ODU4 particles electrically cross-linked

16. In a point-to-point WDM networking scenario, the signal-to-noise ratio of a single channel is low, while other channels are normal. What is the reason for this being impossible?

The optical power of the OTU board corresponding to this wave at the transmitting end has decreased

The fiber pigtail attenuation from the OTU board corresponding to this wave to the combiner increases

Increased attenuation on the optical path

The gain slope of the amplifier changes

17. In what order do the downstream signals flow through the functional blocks of the SL16 circuit board?

SPI, RSE, MST, MSP, MSA, HPT

HPT, MSA, MST, RST, SPI

SPL, MST, RST, MSP, MSA, HPT

HPI, MSP, MSA, MST, RST, SPI

18. If both the bidirectional OA and OSC report a loss of light alarm in a WDM network, which is the most likely cause?

One-way interruption of line optical fiber

The line optical fiber is interrupted in both directions

Unidirectional degradation of line fiber

Bidirectional degradation of line optical fiber

19. If the LED on the SCC board of OSN 8800 T32 shows a value of 11, which of the following subrack ID information does it represent?

Secondary subrack

No. 1 slave rack

No. 11 slave rack

No. 17 slave rack

20. Which of the following descriptions about branch SNCP protection is wrong?

When configuring a branch SNCP, you need to set the SNCP subtype.

The crossover granularity is GE or Any signal

Trigger conditions are: board not in place, SF, SD

Branch SNCP protection uses the dual-transmit and selective-receive function of electrical layer crossover to protect the customer-side services accessed by the branch board.

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21. Divide the ECC subnet.

4321

4213

2314

1234

22. TOA board is a high-speed service tributary processing board. The following is the description of TOA (STND) board. Which one is wrong?

When the client-side service is STM-16, the port working mode is ODU1 non-aggregation mode, and there is no need to configure the board complete cross

When the client-side service is FE, the port working mode is ODU1 aggregation mode, and the board needs to be configured for complete cross

When the client-side service is GE, the port working mode is ODUO non-aggregation mode, and the board needs to be configured for complete cross

The maximum cross-connect capacity of a TOA board is 20Gbit/S

23. When considering the dispersion distance in a DWDM 10G system, which distance should be considered?

Distance between adjacent sites

Total distance of the entire network

Electrical regeneration distance

All of the above are wrong

24. Which of the following is not a single-layer board?

Optical Add/Drop Multiplexing Board

Optical monitoring channel board

Spectral analysis board

Business processing board

25. When congestion occurs, there are many different queuing strategies. If you need to serve the first-arriving packets first, you can use the () queuing strategy; if you want to ensure that the most urgent and critical services are served first, you can use the () queuing strategy; if you need to balance the delay and delay jitter of each flow, you can use the () queuing strategy; if you want to provide dedicated bandwidth for specific services , you can use the () queuing strategy.

FIFO, PQ, WFQ, CQ

FIFO, CQ, PQ, WFQ

WFQ, PQ, CQ, FIFO

PQ, FIFO, WFQ, CQ

26. Which of the following features can adjust bandwidth on demand when Ethernet networking is used, dynamically increase and decrease members in VCTRUNK without affecting services? When a virtual cascade group member fails, the bandwidth can be quickly adjusted to ensure normal data transmission; when the failed member recovers, the original bandwidth of the virtual cascade group is automatically restored.

LCAS

LAG

DLAG

QoS

27. In SDH networks, the S1 byte is used to transmit synchronization status information. Which of the following S1 byte values represents the G811 recommended clock?

Ox00

Ox02

Ox04

Ox0b

OxOf

28. The new TN55ND2 board of the OSN8800 equipment was found to be unable to go online. Which of the following reasons are impossible?

The master controller has a SWDL AUTOMATCH_INH alarm

The master controller has a SWDL_PKG_NOBDSOFT alarm

The master controller has a SWDL CHGMNG_NOMATCH alarm

The master controller has a SWDL_BD WEAKMATCH alarm

29. Which of the following protections does N3EGS2 support?

TPS

PPS

BPS

DLAG

30. When using a dual slot line group MSP ring, in which of the following cases is the multiplex section overhead K bytes in the pass-through state?

Cross-connect board abnormality

Main control board abnormality

The main control board is not in place

When the multiplex section protocol controller state is pass-through

Page 4 of 18

31. If a ROADM site adopts WSS+RMU configuration, which of the following impacts on SOM is wrong?

If RMU is used locally to add wavelengths and has optical amplifiers, the OSNR value of the wavelength in the through direction detected by the SOM will deviate from the actual value

There is an optical amplifier but no filter locally. The full-wave noise of the local optical amplifier affects the OSNR of the wavelength in the pass-through direction.

The source and sink optical amplifiers of the optical cross-connect at this site must be in the same network element.

32. While expanding the existing network wave distribution system, which of the following performances do not need to be evaluated?

PMD parameters of the link

Optical power of OTU/OA

BER of OTU before error correction at the receiving end

Optical power flatness at the receiving end (with MCA)

33. Which of the following descriptions of the 1+1 protection features on the client side is wrong?

OTU client optical layer dual transmission and selective reception

Protect the OTU board and OCh fiber by occupying two wavelengths for protection and using different routes for transmission

Working and protection wavelengths must be the same

Long application time and wide protection range

34. After replacing the single master control, the new master control software is inconsistent with the previous faulty master control software. Which alarm may be triggered by the network element damage?

SWD_PKGVER_MM

SWDL_INPROCESS

SWDL_CHGMNG_NOMATCH

SWDL_PKG_NOBDSOFT

35. Which of the following does not belong to simple flow classification?

VLAN PRL

ACL

MPLS EXP

IP DSCP

36. Back-to-back OTM sites, three new relay wavelengths are added. The schematic diagram is as follows. Which of the following statements is wrong?

No impact on OTM site up and down services

The input optical power of the optical amplifier board does not need to be adjusted

No further adjustment is required for the VOA on the relay wavelength

The VOA of the upper wave does not need to be adjusted

37. Which of the following descriptions of electrical layer protection ODUk SNCP and branch SNCP is different?

Cross-grain

Scope of protection

Protecting Subtypes

Working Principle

38. In the Linux system, configure an IP address 129.9.1.100 for the network card Eth0. Which of the following command is used?

ifconfig eth0 129.9.1.100

ipconfig 129.9.1.100

ipconfig eth0 129.9.1.100

ifconfig 129.9.1.100

39. What network problems can’t QoS solve?

Business single width

Delay jitter in transmission

Packet loss rate

Transmission resources

40. Which of the following is an error in the system OSNR commissioning?

Adjust the single wave group first, and then adjust the main line optical power

One of the principles for adjusting the OSNR flatness of the MPIR point system: After the system power is determined, the OSNR flatness of the MPI-R point is tested by a spectrometer. If the OSNR flatness does not meet the standard (OSNR flatness index s21B), it needs to be adjusted.

The combiner is an M40V board. "Look at the receiving end and adjust the transmitting end". While ensuring that the optical power flatness meets the index requirements, the optical power flatness can be sacrificed to ensure the flatness of OSNR (or BER).

APE automatically adjusts the optical power of each channel to ensure the flat optical power at the receiving end, thereby ensuring the flatness of OSNR

Page 5 of 18

41. NSF (Non-Stop Forwarding) means that when a certain type of device failure occurs, data forwarding is still performed normally to protect the key services on the network. In which of the following scenarios will the NSF function fail to perform data forwarding normally?

XCS board hard reset (XCS board has 1+1 protection)

Soft reset of the service processing board

Hard reset of the service processing board

XCS board soft reset (XCS board has no protection)

42. When planning a 1+1 HSB, corresponding planning principles should be followed. Which of the following are not planning principles for HSB?

If the protection type is recovery, it is recommended to set the waiting recovery time to 5 to 12 minutes. The recommended setting is the default value of 10 minutes.

It is recommended to enable reverse switching to prevent invalid RDI switching at the transmitting end due to signal fading.

It is recommended to set "Alarm reporting mode" to "Protection group reporting only"

Although 1+1 HSB has no restrictions on the slots of the IF boards, it is still recommended that the master and backup IF boards be installed in the dual slots.

43. The insertion loss of the 40 split-wave channels of D40 is 6dB. Without considering the influence of noise, when the signal is full, the optical power of the IN port of D40 is X dBm. If the optical power of the IN port is decreases by 1dB, the measured value of one of the output ports is 6dBm. (Assuming that the optical power of each channel is balanced, lg40=16)

(X-5)

(X-6)

(X-22)

(X-23)

44. The IP address you use is 165.247.52.119, and the subnet mask is 255.255.240.0. Which subnet is your host on?

165.247.52.0

165.247.32.0

165.247.56.0

165.247.48.0

45. In order to achieve the specified synchronization quality requirements, corresponding requirements must be made for the synchronous transmission network, and certain networking rules must be followed during network planning. Which of the following is wrong?

In one clock transmission direction, the number of stations between transit office clocks cannot exceed 30.

The number of switching station clocks cannot exceed 10

The total number of devices in one direction cannot exceed 60

46. OptiX OSN 1800 is a compact multi-service optical transport platform. Which of the following descriptions is wrong?

Does not support 158802 transmission and does not support external time signal access

Single channel maximum rate 10Gbit/s (OTU2)

The OptiX OSN 18001 chassis provides a total of 4 service board slots

The OptiX OSN 180011 chassis provides a total of 8 service board slots

47. Which of the following statements about the reporting of OTUk_BDI alarm is wrong?

Only the WDM side port will report OTUk_BDI

The downstream station's corresponding OTU board receives OTUk_AIS

The downstream station's corresponding OTU board receives OTUk_TIM

The downstream station’s corresponding OTU board receives OTUk_SSF

48. When the PTN equipment EX2 board is connected to the STM-64 port, how should the working mode of the interface be set?

Self-negotiation

Adaptive

LAN

WAN

Unable to connect

49. During the network acceptance test, it was found that OSN 3500 could work normally when connected to an external clock source, and entered the hold state when disconnected from the external clock source. However, the hold state could not last for 24 hours. Which of the following are the possible reasons?

The time of accessing the external high-precision clock source is too short

The clock SSM function is not enabled

Clock level setting error 70200

The clock crystal oscillator fails and the board needs to be replaced

50. Which of the following statements is wrong about the test items of IEEE 1588V2 time protection function?

The active and standby states of the clock board and cross-connect board on the OptiX OSN 8800 are related to each other. When performing a switchover test, it is recommended to only switch the cross-connect board or the clock board.

The active and standby states of the clock board and cross-connect board on the OptiX OSN 6800 are related to each other. When performing a switchover test, it is recommended to only switch the cross-connect board or the clock board.

Test the long-term stability of the time performance in PTP synchronization mode. The output time performance should be within ±1us.

For the long-term jitter test of the physical layer synchronization mode, a time analyzer with a GPS receiver is used to observe at the node for more than 8 hours. The test output time performance should be within ±1us.

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51. Which of the following is wrong about optical power adjustment?

For 10G and 2.5G systems, adjust the wavelength conversion board receiving optical power to "high 3 low 5", the high thousand receiving sensitivity is 3dB, and it is 5dB below the overload point.

Adjust the VOA (adjustable optical attenuation) in front of the optical amplifier board so that the board input optical power = input single-wave nominal optical power + 10IgN, where N is the actual wave number. If the adjustment cannot reach the nominal value, adjust the VOA attenuation to the minimum.

Adjust the optical amplifier board OAU gain to make the output optical power value reach the standard

The actual gain upper threshold of an OAU is smaller than the nominal gain upper threshold, indicating that the performance of the OAU board has deteriorated. It is recommended to replace it.

52. It is known that the technical indicators of the GE optical switch port of a certain PTN-equipment are as follows: average transmit optical power (dBm.): -5-0, receive sensitivity (dBm): -23, minimum overload point (dBm): 3, minimum extinction ratio (dB): 80. For this optical interface, which of the following optical powers (dBm) is the most suitable receive optical power?

-3

-15

-5

53. Data consistency check

Which is correct?

1234

4321

2134

4231

54. Which of the following statements about the ISU2 board of RTN 900 is wrong?

Support NativeSTM-1 +Ethernet mixed mode

Support E1 priority

Support MPLS and PWE3

Support XPIC function

55. After the ASON network undergoes multiple topology changes, the LSP of each service is often not optimal, so an optimization function is provided for this purpose.

Which of the following options does not belong to the optimization function features?

Only manual optimization is supported, and the optimization cannot change the protection level of the optimized LSP

Business routes cannot be constrained during the optimization process

Rerouting, upgrading, deleting, etc. are not allowed during optimization.

Optimization cannot be performed when creating, rerouting, upgrading, resetting, restarting, or deleting.

56. Which of the following steps adds a pointer?

C-12 to VC-12 process

VC-3 to TU-3 process

TUG2 to TUG3 process

TUG3 to VC4 process

57. A network is configured with SOM. When performing path performance analysis, the OSNR value of the downstream optical amplifier in the OCh path is higher than that of the upstream optical amplifier. Which of the following analysis is wrong?

After the initial configuration of the SOM route is issued, the performance analysis is started immediately. If the SOM route is configured in the OMS segment at this time, and the OSNR calculation is started first, there is no OSNR calculation value in the previous segment as a basis, this phenomenon will occur.

The OSNR value calculation of the first part of the OMS segment where the OCH path is located has been completed, but the calculation of the second part has not yet started. At this time, the performance analysis is started. Due to external reasons, the newly calculated value of the first part is reduced, which will cause this phenomenon

The network management sends the SOM routing configuration to the OMS segment on the path from the front to the back. It takes about a few seconds for each OMS segment to send the SOM routing configuration. There is a time difference in configuring the SOM routing between each OMS segment .

Click "Analyze" on the "Path Performance Analysis" interface to restart the performance analysis to solve this problem.

58. It is known that N ∗ PTN sites are interconnected through a WDM network. Which of the following interface networking will not be used?

10GE

FEO

POS

Ch STM-1

ATM STM-1

59. In a microwave system, if the receivable TTI and the actual TTI are inconsistent, which of the following alarms will be reported?

OTUk_TTl

OTUk LOS

OTUk_LOF

OTUk_TIM

60. The same physical board or two adjacent network elements supports a maximum of several VC12 virtual TE links.

Page 7 of 18

61. In an 80-wave system, using a DAP (TN150AC106) amplifier, the total input power is -16~4dBm, and the typical gain is 17Db. What is the nominal single-wave output optical power?

0 dBm

5 dBm

1 dBm

4 dBm

62. Which of the following overhead items in the OTN frame structure represents the path tracking identifier?

BDI

TTI

BIP8

GCco

63. Which of the following are performance related to SM segment bit errors?

OTUk_BBE

OTUk_SM_FEBBE

OTUk_SM_FEES

OTUk_PM_BBE

64. Which of the following protections in microwave equipment does not require paired slots?

HSB

SD+FD

65. If the U2000 finds that a certain NE reports the alarm "NE is in safe state", which operation is not allowed on U2000?

Download data from the network management system to the problematic network element

Alarm Synchronization

Upload data from the network element to the network management

Data-consistency verification

66. When OTN equipment is connected to Cisco equipment, the number of CRC error packets on the Cisco equipment interface is relatively large. Which of the following is the impossible reason?

Abnormal connection optical power

The bit error rate on the line side of the OTN equipment is large

The type of interconnected optical module is wrong.

The interconnected optical module is faulty.

67. The wavelength division system mainly uses DCM compensation to compensate for chromatic dispersion. Which of the following statements about DCM dispersion compensation is wrong?

DCM modules are more likely to cause nonlinearity than line transmission fibers, so the optical power entering the fiber must be strictly controlled.

For 10G systems with line fiber lengths within 400km,

652DCM can be used to compensate for

655 (LEAF)

Improper DCM configuration will lead to poor receiving performance

Improper DCM configuration will lead to degradation of the system signal-to-noise ratio

68. Which of the following descriptions of the signal flow of an OTM site (OSN8800 equipment) is wrong?

Service receiving direction: Line--FIU--OAU--M40--LSX--SDH signal

Service sending direction: SDH signal--LSX--M40--OBU1--FIU--line

Service sending direction: SDH signal--LSX--M40--OBU1--line

OSC receiving direction: line--FIU--SC2

69. If there is insufficient remaining space on the OTU board, at which upgrade step is failure possible?

Submission

Activation

Distribution

70. If the transmitter detects that b6-b8 of K2 byte is 110, what alarm will be generated at the transmitter?

MS-AIS

R-LOF

R-LOS

MS-RDI

Page 8 of 18

71. When the number of Huawei equipment network elements using extended ECC communication exceeds (), manual extended ECC communication must be used.

72. Which service type does the TOM board not support?

FC400

STM-16

STM-1

FC200

73. What types of boards need to be upgraded when upgrading NG-SDH equipment?

123

321

213

312

74. Reasons for reporting BEFFEC_EXC alarm: Which of the following statements is wrong?

The signal is lost too much during line transmission.

The OTU board input optical power is too high or too low

This alarm will not be reported in AFEC mode.

The FEC mode of the OTU at both ends is set wrongly.

75. In an ASON network, if the control channel between two network elements is blocked, which of the following options is impossible?

The logical board of the network element is not created or is created wrongly.

The other end does not have the intelligent feature enabled

DCC between two network elements is not working

The DCC byte is not allocated to the corresponding resources of the 9-byte mode

76. For NG-SDH equipment equipped with dual main control boards, when the main control board is upgraded, which of the following statements is correct?

After the standby main control board is upgraded, the original main control board can be upgraded by switching between the main and standby boards.

Upgrade the active MPU first, then upgrade the standby MPU

First complete the upgrade of the standby main control board, then hard reset the current main control board to switch the main and standby boards, and then upgrade the current standby main control board.

First upgrade the active MPU and then upgrade the standby MPU in the same way.

77. In NG-SDH equipment, which of the following conditions will not cause TPS switching?

3.3V power supply undervoltage

58M crystal oscillator is abnormal

Chip abnormality (SD538, SA527, CPLD)

Working branch board reports T_LOSEX

78. The gain of the OAU board is 23db. 1% of the total output power of the OAU board is used for MON detection. The output optical power of the MON port is -8dbm. What is the input optical power of the IN port of the OAU board?

-11dbm

-13dbm

-15dbm

-21dbm

79. Which of the following items are optional items for microwave station commissioning?

Align the antenna

Test ECC

Clock tracking test

Testing business

80. A network has 2250 equivalent network elements of the SDH series, 1000 equivalent network elements of the WDM series, and 1000 equivalent network elements of the router series. The customer purchased value-added functions such as SDH end-to-end, WDM end-to-end, and Corba northbound.

Which of the following is wrong about this network management deployment plan?

Since there are SDH, OTN and router series network elements, it is necessary to install the SDH network element manager, OTN network element manager and router network element manager subsystems

The maximum management capability of the SDH network element manager subsystem is 2500 equivalent network elements: therefore, one SDH network element manager instance is required: the router network has no manager, and the maximum management capability of the system is 500 equivalent network elements, so you need to deploy 1 router Ayuan Manager instance

Since you have purchased SDH end-to-end and WDM end-to-end value-added features, you need to install the SDH network management subsystem and OTN network management subsystem; because you have purchased the Corba northbound interface, you need to install the Corba northbound subsystem.

The OTN series network elements are OSN 6800+OSN 80032 (without ASON, the ratio of the two numbers is 1:1), of which OSN 6800 is the master subrack and OSN8800 is the slave subrack. And each master subrack only carries one slave subrack: the actual number of OSN 8800 physical subracks is 125.

Page 9 of 18

81. Which of the following statements about the alarm reversal function is wrong?

For ports that do not have services enabled, alarm inversion is used to avoid generating related alarms.

The default state is non-inversion mode. In this mode, the alarm inversion of the port cannot be set.

In automatic recovery mode, you can set the port to reverse the alarm regardless of whether there is an alarm on the port.

After the port alarm inversion is set, no alarm is reported when there is actually an alarm, and an alarm is reported when there is actually no alarm.

82. An operator needs to configure 60 clients, 200 OptiX PTN 1900s, 100 OptiX OSN 3800s (with ASON), 150 NE4OEs, 200 CX600 series devices, FTTxOLTs and MDUs on the access side, a total of 80,000 xDSL lines, 70,000 PSTN ports, and 30 OLTs and 300 MDUs. Which of the following description of this network is wrong?

The number of physical network elements that the network management center needs to manage is 980

100 OptiX OsN3800s (with ASON) are equivalent to 350 network elements

In practice, it is necessary to reserve expansion capacity at 50% of the current network size.

The network is a medium-sized network

83. Regarding ODUk ring network protection, which of the following statements is wrong?

Each service is bound by a segment ID to achieve the unique difference between services.

The node where the management point is located can have no business binding

The entire ring only needs to configure one node as the management point

Only the working channel service needs to be manually configured, and all protection channels are automatically generated

84. Which of the following descriptions of coherent technology is correct?

Coherent technology has increased the line rate to 100G while still keeping the spectral bandwidth significantly less than 25GHz

Coherent technology eliminates CD/PMD through DSP

Coherent reception technology, OSNR tolerance can theoretically be improved by 2dB

Wavelength division can evolve to single-wavelength 100G or even higher rates by selecting phase OUT or traditional non-phase OTU

85. In an ASON network, when a fiber contains part of the multiplexing section, the working time slots of the multiplexing section constitute (); the protection time slots of the multiplexing section constitute (); and the time slots unrelated to the multiplexing section constitute (). If resources are reserved for the time slots (for static services), these time slots are divided into ().

Please select the appropriate answer from the options below in order.

Working link, protection link, unprotected link, static service dedicated link

Protection link, working link, unprotected link, unprotected link

Working link, protection link, unprotected link, unprotected link

Working link, protection link, unprotected link, protection link

86. Which of the following is not an antenna parameter?

3db beam angle

Front-to-back ratio

Standing wave ratio

Antenna gain

87. Which of the following is wrong in the workflow of connecting U2000 CORBA to OSS?

Start the name service and notification service Starting U2000 CORBA

CORBA registers with the notification service CORBA creates a channel to the name service

OSS through CORBA client name service The OSS CORBA client finds the event channel through the name service

OSS accesses CORBA agent through CORBA client CORBA Agent reports messages to OSS through the event channel

88. Which of the following are not precautions for initial inspection?

Before testing, check whether the required test lines are complete, the connector type is suitable for the instrument, and whether the connection is good.

Prepare cotton swabs and alcohol. When testing the optical interface characteristics, pay attention to the cleanliness of the connector at all times to ensure the accuracy of the test data.

When testing, be careful not to look directly at the light transmission interface to avoid eye damage.

When conducting a 24-hour bit error test, ensure that the entire test process is not disturbed by external factors (including human factors and power supply conditions, etc.). If there is an abnormality, the exact time of the abnormality should be recorded or the test should be repeated. The test time does not need to exceed 24 hours.

89. During the U2000 network management path search process, the path search management module first scans the cross-connections of each network element, constructs sub-paths based on the cross-connections of adjacent network elements, and tries to merge these sub-paths. Which of the following sub-paths are legal?

Subpaths form a cycle

The path does not pass through optical fiber

The original end is not the end point of the sub-path or the exit subnet optical port

The sub-path terminates on a pre-configured network element

90. After which of the following steps can the rollback operation no longer be performed?

Distribution

Activation

Submission

Page 10 of 18

91. During the equipment installation process, which of the following statement is wrong?

Wear anti-static gloves or an anti-static wrist strap before touching equipment, holding plug boards, boards, IC chips, etc.

Inside the cabinet, the spacing between the fiber optic cable tie/fiber optic cable tie should not exceed 250mm, and the spacing between the user cable cable tie should not exceed 200mm.

For heat dissipation, empty slots on network elements do not need to be filled with filler panels.

When plugging or unplugging a board with a connecting cable or pigtail on the panel, you should first unplug the connecting cable or pigtail before plugging or unplugging.

92. Which of the following descriptions of OSS is wrong?

The network layer of OSS is above NMS, and the management function of network element devices is generally implemented through NM

OSS system is mainly used to improve the work efficiency of equipment maintenance personnel

OSS (Operation Support System) is a software system that provides operators with functions such as performance management, inventory management, business management, and fault management of communication equipment.

U2000 supports multiple northbound interfaces such as SNMP, TL1, XML, CORBA, etc., which can achieve rapid integration with the operator's OSS system.

93. User A and User B belong to the same Team group. User A has a file File1. After running the command "S Chmod 750 File1 ∗ " , which of the following statements is wrong?

User A has read/write/execute permissions for File1

User B cannot modify File1 because he does not have this permission

Users who are not in the Team group have only read permission on File1

Users in the Team group have read and execute permissions on File1

94. Regarding file operation and maintenance, which of the following is wrong?

When using FTP to transfer files, you can transfer ASCII files in binary mode, but you cannot transfer binary files in ASCII mode.

For text files, the ascll method cannot be used for transmission

To transfer a file from your PC to your workstation, you can use the Put command

Files compressed with winzip on a PC can be decompressed with the unzip command on a workstation

95. A company has built a network with 20 subnets and Class C IP addresses. What subnet mask should be used to correctly configure the network?

255.255.255.248

255.255.255.224

255.255.255.192

255.255.255.240

96. If the OSS is connected through the CORBA interface, a session connection is established between the U2000 and the OSS. Which of the following descriptions about the session connection is wrong?

CORBA Agent will continuously ping Oss. If there is no response for 4 times, the connection will be disconnected.

After the session connection is established, the U2000 CORBA interface will periodically call back the ping method of the upper-layer network management registration object NMS Session_I (the ping here refers to the ping command usually referred to)

U2000 CORBA agent will actively send a heartbeat notification to OSS every 30 seconds. Its main purpose is to detect the service status of the notification service.

There is also a response timeout between the OSS system and the notification service, which can be set by the customer according to the network conditions.

97. Which of the following is wrong in the description of the U2000 northbound CORBA interface configuration?

The U2000 northbound CORBA interface and the U2000 server run on the same machine. The machine configuration must be able to install and run the U2000 server. No additional hardware configuration is required.

Set the host address and enter the host name or IP address according to the network management planning and design. The "host" here refers to the computer that provides CORBA services.

The default port numbers for normal mode and SSL mode in the u2000 CORBA basic configuration are different.

In the u2000 CORBA configuration, at least one of the filtering virtual NE switch and the virtual NE switch must be configured.

98. Which of the following clock networking optimization is wrong?

Under non-SSM switching protocols, the clock network can only be configured as unidirectional and cannot form a ring.

For RDH, ITU_T stipulates that sa4~sa8 of 4 consecutive odd frames in 2M bit signal TSO are used to transmit quality information, and XSDH uses b5-b8 of S1 byte to transmit the same quality information. 8DH equipment can automatically extract SSM information from the 2Mhz external clock signal provided by BTS equipment, so as to know the quality level of timing signal.

Under the standard SSM switching protocol, the clock can be configured as bidirectional, but it must not be configured as a loop. Enable the extended SSM protocol to solve the clock loop problem by assigning a clock ID to the clock source.

The timing reference clock transmission link requires that a maximum of N=20 network elements must be introduced into the switching station clock for clock shaping and regeneration (inserting high-quality grade clocks), with a maximum of K=10 switching station clocks. The maximum number of G813 clocks in the clock link shall not exceed 60.

99. NG-SDH products initially supported the board-level hot patch function. V100RO08 and later versions began to support both board-level hot patch and patch package functions (different main control types support different hot patch upgrade methods). What versions are supported from V100R010 and later versions?

Patch package function

Board-level hot patch and patch package functions

Support board-level hot patch function

None of them

100. What is the method used to multiplex low-order ODUx signals into high-order ODUk signals?

Wavelength Division Multiplexing

Frequency Division Multiplexing

Time Division Multiplexing

Space Division Multiplexing

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101. The NHLFE next-hop label forwarding table entry contains the next-hop address and which of the following?

Previous hop address

Interface address

FTN

ILM

102. Now there is a chain network of three network elements NE1-NE2-NE3. A low-order 2M service from NE1 to NE2 is configured. All three network elements are configured with low-order cross-connection. How to deal with the J byte of the corresponding channel of NE2? Which of the following is correct?

Overhead pass-through

Overhead detection

Expenses Verification

Expenses End

103. When performing software loopback on the optical port on NS3, what alarm will be sent to the NS3 board at the other end?

OTU3_LOF

ODU3_PM_SSF

ODU3_PM_OCI

ODU3_PM_AIS

104. Which item in the network management planning process is not absolutely necessary?

Network scale planning and network management deployment planning

DON network planning and OSS connection planning

Network parameter planning and reliability planning of network management servers

Network management software/hardware configuration

105. Which of the following descriptions of the 100G hybrid transmission system is wrong?

Coherent and incoherent signals (10G, 40G ODB) will affect each other, causing a sharp drop in performance, and isolation is necessary.

40G DQPSK and phase signals will not affect each other, and no isolation band is required

During mixed transmission, the coherent signal starts from the long wavelength, 10G starts from the short wavelength, and the isolation band can be filled with 40G DQPSK wavelength

The mixed transmission cost is related to the number of transmission spans and the width of the isolation band, and has nothing to do with the FEC encoding method.

106. Which of the following descriptions of 100G system protection configuration is correct?

When using OLP or DCP with LSC board to realize 1+1 protection within the board, the switching mode can be set to single-end switching or double-end switching.

When the scheduling granularity of the NS4 board is ODUflex, it can support ODUk ring network protection

406/100G is relatively similar to 40G eDQPS

The 40G eDQPSK has 1+ protection on the board, and the protection channel does not need to be equipped with an additional TDC board.

The TTX board can support branch SNCP protection only when the client side accesses 10GE LAN services.

107. What is the reason why OTN equipment network elements are frequently disconnected?

Using optical monitoring, the DCC mode is set wrongly

Electric monitoring is used, and the line quality is poor

NE ID conflict

The same NE user logs into the NE at the same time

108. Which of the following is wrong about the cause of OA_LOW_GAIN alarm?

The optical power input to the board is too high

The insertion loss between the TDC and RDC optical ports is too large (only for OAU boards)

The board that reported this alarm is faulty

The gain of the optical amplifier board is set too low

109. Using the integration method to measure the OSNR value of a 100G signal, the integrated value of the signal power + noise power within the channel interval read from the OSA is 9 68uW, the integrated value of the noise power within the channel interval is 29.58nW, and the integrated power within 0.1nm of the signal center frequency is 7.395nW. The OSNR value is ()

10log [(9D68-0.02958)/0 007395]

101og [(9.68+0.02958)/0 007395]

10log [(9.68-0007395)/0 02958]

10log [(9 68+0.007395)/0 02958]

110. Which of the following operations may cause bit errors due to nonlinear effects?

Replace the transmitting optical amplifier board with a Raman board to reduce the bit error of the OTU board

Increase the gain of the transmitting optical amplifier and reduce the bit error of the OTU board

Reduce the optical power output at the transmitting end to reduce the bit error of the OOTU board

Adjust the gain of the receiving optical amplifier board to reduce the bit error of the OTU board

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111. NE1NE2NE3 form a chain network. There is a VC4 service between NE1 and NE3. NE2 is a pass-through site. After the configuration is completed, NE3 site reports the HP-SLM alarm of C2 byte mismatch. What are the testing points at this time?

NE1 sends C2 byte

NE2 westbound C2 byte

NE2 eastbound C2 byte

NE3 receives C2 byte

112. Which of the following statements about the main and backup channels of optical line protection is wrong?

“Initial difference between the main and backup channels (dB)” is used to set the reference value of the optical power difference between the main and backup channels of the board.

“Active/standby channel difference threshold (dB)” - used to set the value at which the difference in optical power between the active and standby optical ports on a board is considered a signal failure (SF).

When the difference between the full optical power exceeds the threshold, the optical switch switches the service to the backup channel. The set value can be queried. The recommended setting is 5ab

If the current optical power difference between the primary and backup channels exceeds the "primary and backup channel difference threshold (dB)", the system will undergo protection switching.

113. The clock ID can solve the problem of timing loops that may occur. In the following network, how many clock IDs need to be set in total to completely solve the clock loop?

114. Which of the following IP addresses is a Class C IP address?

C2.A8.D2.e1

10.110.192.111

10011010.01101110.10000000.01101111

127.0.0.1

115. Which of the following descriptions about OTN enabling electrical layer ASON is wrong?

TE link priority: working, protection, preset working, preset protection, other reroutable resources; other reroutable resources may also be working, protection, preset working, preset protection paths of other services, etc.

The generation of TE link is affected by the alarm of the N board port. If Loss or OTU_LOF or serious bit error exists, TE link cannot be generated;

The network elements with N-board relays also need to enable intelligence, and the N-board relay mode must be the normal line mode, and back-to-back crossover is required;

You need to enable the OSPF protocol status of ETH1 in the OSPF protocol status in the advanced maintenance menu;

116. To which step does GetEventChannel belong in the working principle of CORBA?

Session maintenance

Session Warning

Information Query

Session initialization

117. Which of the following descriptions are wrong when relocating an OLA site (10G system)?

The relocation distance has changed, and the system signal-to-noise ratio needs to be re-evaluated

During the relocation process, the optical power of upstream and downstream sites does not need to be adjusted by the network management.

The relocation distance has changed, and the system dispersion needs to be re-evaluated

The relocation distance has changed, and the line optical power needs to be re-evaluated

118. PW OAM is basically the same as Tunnel in terms of functions. The PW OAM mechanism can effectively detect, confirm and locate defects and faults originating from the PWI layer network. Which of the following functions does PW OAM not have?

Ping

BDl

FDI

119. An ETH_LOS or LINK_ERR alarm appears on a single Ethernet port of a multi-interface Ethernet board, and the service is interrupted. Possible reasons include: Ethernet port working mode mismatch or interface rate inconsistency, optical module hardware failure, and which is other possible reasons?

Fiber optic connection error

Ethernet port property settings are wrong

The MTU parameter is set too small

SDH line VC4 channel failure

120. When which of the following pointers is adjusted, the information payload area carries the most information payload?

Positive adjustment

Negative Adjustment

No adjustment

All of the above are possible

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121. Regarding the network-level protection switching test of the OTN system, which of the following statements is correct?

Use ODUk-SNCP protection on top of OLP protection. To avoid secondary switching of SNCR protection, set a delay time in the SNCP protection group.

The power difference between the main and backup channels of the OLR protection group exceeds 3dB by default. An alarm is reported, and the maximum value can be set to 8dB

The default value of the abnormal threshold of the OLP master and backup optical power is more than 5dB, and the switching is executed; the threshold range can be set from -5 to 5

In the OTN-carrying SDH multiplex section ring networking scenario, in order to avoid simultaneous switching of OLP protection and MSP protection, you can set a delay time in the MSP protection group.

122. When configuring Ethernet services, the values of the J1 byte in the high-order path overhead to be sent and received are the same, but the Ethernet boards EGT2 and EFFSO both generate HP_TIM alarms. Which of the following is correct?

EGT2 and EFSQ protocols are inconsistent

EGT2 and EFSO cannot dock

The mode of J1 byte setting is inconsistent

Optical path failure

123. How many bytes does a Layer 2 MPLS labeled message have more than the original IP message?

124. Which of the following is not one of the three methods for ASON service recovery?

Optimize to other paths for recovery

Force reactivation to restore

Downgrade to traditional business reconstruction and recovery

Download NE database recovery

125. A certain wavelength division network, the networking is shown in the figure.

Now, due to the need for new services, two waves need to be added and dropped at site B, that is, the OLA site needs to be transformed into a back-to-back OTM site. Which of the following descriptions is wrong?

To change the site type from OLA to back-to-back OTM, you need to add M40/D40/OA/OUT boards. You need to evaluate whether the existing network subrack slots are sufficient. If a new subrack is required, you need to evaluate whether there is space to install the new subrack.

Since the original network dispersion is normally compensated, it is not necessary to consider adjusting the dispersion after the network transformation.

It is necessary to recalculate the design signal-to-noise ratio of each segment AB, BE, and AE to evaluate whether the designed signal-to-noise ratio can meet the needs of business reception.

Perform optical power budgeting for the new service relay segment and redesign the power of the transformed site according to the requirements of the back-to-back OTM site. If possible, add an optical amplifier board.

126. Which of the following description of cluster management is wrong?

Nodes in a cluster have the same cluster ID

For a resource group to be online, all its dependent resource groups must be started before it can be online; when a resource group is offline, all its dependent resource groups must be offline before it can be offline.

WR must be started before the App and closed after the App

VVR group: includes the basic resources for VCS operation ClusterSerice group: used for data replication control

127. Which of the following descriptions about Flexible ROADM is wrong?

Improve spectrum utilization and meet the flexible scheduling requirements of the future era of rates exceeding 100 Gbit/s.

Flexible grid technology can flexibly set bandwidth and support flexible allocation and scheduling of bandwidth.

WSMD2 board supports Flexible ROADM configuration

Flexible ROADM is compatible with existing networks

128. Which of the following operations on the OptiX OSN 3500 equipment will affect the normal operation of the multiplex section protocol?

Reset the circuit board

Reset the main control board

Reset the crossbar

Reset the tributary board

129. OTN needs to change the original D40 to M40 pass-through single wave to use NQ2 as a relay. Which of the following descriptions is wrong?

For optical layer ASON and electrical layer ASON applications, setting "optical relay mode" and "electrical relay mode" has no effect on the system.

When crossover relay is not used, the NQ2 fiber connection (taking 1 optical port as an example) is that IN1 port receives westbound signals and OUT1 port sends eastbound signals.

Cross-connection can be used for relaying. In this case, a cross-connection board needs to be configured.

When NQ2 uses a relay board and does not enable ASON, an electrical relay is required for end-to-end path.

130. Which of the following statements about latency testing is wrong?

Delay is divided into the delay of the storage and forwarding device and the delay of the forwarding device. Huawei devices are all storage and forwarding devices.

The timing starts from the first bit of the data frame entering and ends when the first bit of the data frame appears at the output terminal

The time difference between the two is the delay of the bit forwarding device.

The time starts from the first bit of the data frame entering and ends when the first bit of the data frame appears at the output terminal

The time difference between the two is the delay of the bit forwarding device.

During latency testing, the frame rate can be greater than the throughput

Page 14 of 18

131. Two MSP rings intersect, and one of the network elements at the intersection has SNCP and MSP protection coexisting. How to solve the secondary switching phenomenon caused by protection coexistence?

Set the delay time when configuring the MSP cross-connect

Set the delay time when configuring SNCP cross-connection

You need to set the delay time when configuring MSP278SNGB

No need to set a delay time

132. Which of the following statements about OTN multiplexing and overhead is wrong?

Client signals (e.g., IP/MPLS, Ethernet, SDH signals) are mapped to ODUk as ODU payload plus ODU overhead.

ODUk is combined with OTU overhead and FEC overhead and mapped to the standardized optical channel transmission unit, which constitutes OTUk

OTN optical layer overhead is non-channel overhead and is transmitted by an independent optical supervisory channel OS

The overhead of the OTN electrical layer unit is the channel overhead, which is transmitted together with the payload.

133. NG-SDH equipment allocates ECC channel numbers according to certain principles. For example, by default, if a four-port board is first inserted in slot 4, the board is assigned channel numbers 0, 1, 2, and 3. Then, if an SL16 board is inserted in slot 2, the board is assigned channel number 4. If the SL16 board in slot 2 is removed and a four-port board is inserted in slot 8, what channel number will be assigned?

5, 6, 7, 8

4, 5, 6, 7

4, 6, 7, 8

Random Assignment

134. Which of the following statements about PTN's VPLS technology is wrong?

VPLS (Virtual Private LAN Services) is a LAN-like service provided on an MPLS (Multiprotocol Label Switching) network.

VSP is a virtual Layer 2 forwarding entity that defines the number of members in the VPLS domain on the P

It is similar to a virtual switch.

PE only needs to use the VLAN ID in the user message without other parameters (such as the destination MAC address in the message) to decide whether to forward the Ethernet frame directly to the CE or to the peer PE through the P

Manually configure split horizon groups to avoid Ful-mesh VPLS loops

135. The four network elements A, B, C, and D form an SNCP ring, and there are a large number of PDH services between A and B.

One day, the optical fiber between A and B was disconnected. In order to eliminate the RLOS alarm on the network management, an engineer looped the optical ports at both ends of the disconnected optical fiber. By default, after 10 minutes, what phenomenon will occur?

The service between A and B is interrupted, and the switchover alarm disappears.

The services of A and B are not affected, and the switchover alarm does not disappear.

The service between A and B is interrupted, and the switchover alarm does not disappear

The services between A and B are not affected, and the switchover alarm disappears.

136. For 10G and 100G mixed transmission systems, which of the following descriptions is correct?

It is recommended to use long wavelength for 10G channels and short wavelength for 100G channels

The commissioning needs to be carried out in accordance with the 100G commissioning requirements, i.e. non-standard fiber optical power commissioning method

For 100G single wave, since the dispersion tolerance is very large, the dispersion compensation can be carried out according to the compensation principle of 10

The OSNR threshold of 100G board is basically the same as that of 10G, so the configuration of the amplifier board can be configured according to the 10G standard.

137. In the U2000 dual-machine installation and commissioning, which of the following operations can be performed by the ossuser user?

If you forget your password or your password expires and you cannot log in to dbuser, you can log in to the operating system as ossuser and change the password in the terminal using the #passwddbuser method.

When the U200OLicense file is modified to DOS format, you can log in as the ossuser user and execute the dos2unix command to convert the U2000 License file format from DOS format to UNX format.

Change the password of the admin user who logs in to the vcs client

On Solaris or SUSE Unux platforms, if you cannot log in to the graphical desktop, you can log in as the ossuser user and use the command line to restore the binary mode database.

138. Which of the following statements about traffic regulation and traffic shaping is correct?

Traffic policing can only be used in the inbound direction, and traffic shaping can only be used in the outbound direction.

Traffic policing can only be used in the outbound direction, and traffic shaping can only be used in the inbound direction.

Traffic policing can be used in both inbound and outbound directions, while traffic shaping can only be used in the outbound direction.

Traffic policing can be used in both outbound and inbound directions, while traffic shaping can only be used in the inbound direction

139. The length of Ethernet frames has a lower limit. What is the main consideration?

Carrier Sense

Multi-point access

Conflict Detection

Improve network bandwidth utilization

140. During the intelligent service downgrade process, the intermediate node is reset, and the downstream node will have ().

Signaling Residual

Time slot reservation residue

Time slots do not cause residual

Page 15 of 18

141. In the reference source monitoring window, if the SSM signal queried is DUS, it means that the clock signal is ().

Clock signal that meets

811 quality requirements

Clock signal that meets

812 quality requirements

Clock signal that meets G813 quality requirements

Unavailable clock

142. The device perceives the frame structure, framing mode, and time slot information encapsulation method () in the TDM circuit.

CESoPSN

QINQ

SAToP

MPLS

143. In a Solaris hot standby system, the information of file1 queried using "lsП" is "Wxr-Xr-- 2wjm newservice 3210ct 1709: 33 f1". Which of the following statements is wrong?

The 2nd to 4th characters "X": indicate that the file owner wjm has the rights to read, write and execute the file fle1.

The 5th to 7th characters "rx"": indicate that all users in the user group newserice have the following rights to the file fle1: readable, not writable, and executable

The 8th to 10th characters "5-" 020 indicate that other users have the right to read, not write, and not execute the file flet.

The fifth field "321": indicates that the file size is 321kb

144. When deploying QoS, where is the complex classification of data flows usually deployed in the network?

Edge access layer

Convergence Layer

Core layer

145. NE1, NE2, NE3, NE4 and NE5 form an MSP ring. There is an STM-1 link between NE1 and NE3. An SNCP VC-4 service is created between NE1 and NE3. The working source of this VC-4 service is on the MSP working path, and the protection source is on the STM-1 link. The SNCP delay time is 100ms. When the first fiber break occurs (between NE1 and NE2), the MSP switching is normal. When the second fiber break occurs in the MSP ring (between NE3 and NE5), the SNCP service is interrupted, and no SNCP protection switching occurs.

What solutions are there?

Set the HP_UNEQ alarm as the SNCP switching trigger condition

Delete the delay time

Change the STM-1 rate to STM-4

Remove NE4

146. #1 and #2 are OTM network elements, point-to-point chain service, 1 channel is opened, OAU of station A emits +4dbm, SC2 board receives -35dbm at station #2, OBU board receives -30dbm, and OTU board receives no light. Which is the most likely cause of the fault?

The sending OTU board is faulty.

The line loss between #1 and #2 is too large

OTU board failure at site #2

The optical protection board at site #2 is faulty

147. Which of the following descriptions of SNMP is wrong?

SNMP (Simple Network Management Protocol) is the Simple Network Management Protocol.

SNMP can be used between upper and lower layer network management, and can also be used between devices and network management.

The northbound structure of SNMP includes OSS (Operating Support System) and Agent. SNMPA is a session layer protocol that specifies how to transfer management information between NMS and Agent.

The SNMP southbound protocol specifies how to transmit information between the U2000 and network element devices.

148. On an STM-1 frame, 15 VC-12 services are created in sequence from 1 to 15. Then, when a VC3 service is created on the second VC-3 of this STM-1 frame, what is the result displayed by the network management system?

Operation successful

Time Slot Conflict

No display

Not enough resources

149. Which of the following is not one of the possible reasons for ASON service rerouting?

The optical power is too low, causing the corresponding line-side port to report an R_LOS alarm

The cable is disconnected, causing the client-side port to report an R_LOS alarm

The optical cable is disconnected and the optical layer reports the MUT_LOS alarm

The bit error rate is too high, causing the corresponding service to report an SD alarm

150. In a remote area, the land is frozen all year round, and there are many bridges and tunnels on the only road for local people to travel. In order to monitor the health status changes of these engineering structures, which of the following fiber optic sensing systems is needed?

Point-type fiber optic sensing

Distributed Fiber Optic Vibration Sensing

Distributed Fiber Optic Temperature Sensing

Distributed Fiber Optic Stress Sensing

Page 16 of 18

151. Which of the following belongs to the sink function of the ODUk layer?

Calculate BIP-8, write PM, GCC1/2, etc.

Report defect information such as LOM, LOF, TIM, DEG, BDI, BEI, BIAE, IAE, etc.

Report defect information such as TIM, DEG, OCI, LCK, AIS, etc.

Mapping, frequency adjustment, and bit rate adaptation.

152. When configuring Ethernet private network services in single-station mode, set the Tag type to "Tag-Transparent".

At this time, which of the following is the MAC address learning mode?

SVL, can be set manually

IVL, cannot be set manually

SVL, cannot be set manually

IVL, can be set manually

153. Which of the following ASON functions and features can both improve the controllability of the service rerouting path and shorten the service rerouting time?

Business path pre-calculation

SRLG

Business Optimization

Preset recovery path

154. Which of the following descriptions about ASON service association is wrong?

After service association is configured, when one LSP is rerouted or optimized, it is separated from the other LSP as much as possible and does not completely overlap with the associated LS

ASON does not support the creation of services associated with different nodes.

Business association is to associate two businesses together, and is mainly used to access businesses with two access points.

The access points associated with the service can be two different line boards or two different network elements.

155. Which of the following is not one of the possible reasons for the CPW_OMS_TEL_DOWN alarm?

Fiber misconnection

The OMS TE link LMP protocol is not enabled

There is no available control channel between the nodes at both ends of the OMS TE link

Circuit board failure

156. Which of the following descriptions about configuring dual-homing diamond-level services is wrong?

Dual-homing access to diamond-level intelligent services only supports scenarios where OTU boards are used to access services, and does not support scenarios where tributary boards are used in combination.

Dual-homing diamond services and co-homing silver services can be converted to each other.

Dual-homing access Diamond-level services support single-end creation, that is, only one end of the source and destination nodes supports dual-homing service access.

For the 1+1 protection scenario on the customer side, the application of dual-homing access to diamond-level intelligent services is basically the same as the application of associated silver-level intelligent services, but the associated silver-level service needs to manage two services, while the dual-homing access service only needs to manage one intelligent service.

157. In WDM network planning, which of the following scenarios require additional OSNR cost consideration?

In the case of overhead optical cables, the circuit board works in high SOP mode.

Incoherent and coherent wavelengths are mixed in adjacent channels.

The span distance is long and a Raman amplifier is used at the receiving end.

The span distance is long and a high-power EDFA amplifier is used at the transmitting end.

158. When using the wavelength division planning tool for wavelength division optical layer planning, a certain Och route passes through more than 12 spans, and the end-to-end optical red distance exceeds 1000km, resulting in OSNR not meeting the standard.

Which of the following optimization methods is correct?

Use high-performance OTN circuit boards

Raman amplifier is used at the receiving end of each span

Select a station in the middle for electrical relay

Each span uses high power optical amplifier

159. Customers in different industries have different business requirements. For government customers, which of the following indicators is the most important?

Security

Cost-effectiveness

Large bandwidth

Low latency

160. Network maintenance personnel reported that the main light between the equipment at site A and site B was normal and the services were not affected, but SC2 at site B did not receive light. The connection between sites is shown in the figure. The maintenance personnel replaced the pigtail of the RM1 port of SC2 at site B, but SC2 still did not receive light. Using an optical power meter to measure the RC port of the FIU at site A, the input optical power was normal. After replacing the FIU at sites A and B, site B still could not receive the monitoring light from site A. Turn off the laser of the optical amplifier board at site A, and use an optical power meter to query the OUT port of the FIU board at site A. The monitoring light output is normal.

Which of the following descriptions of the cause of the fault is correct?

FEC mode does not match

Optical module failure

Dispersion exceeds the limit

Line optical cable degradation

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161. Users can set up the system to trigger survivability analysis at a scheduled time, or automatically trigger survivability analysis when resources change.

Which function in the Optical Network Survivability Analysis App does this describe?

Fault Simulation

Real-time analysis

Latency Map

Resource warning

162. Which of the following descriptions about the delay measurement principle in the delay map is wrong?

TCM is used to measure the delay from the local circuit board to the other circuit board

Before starting the measurement, configure the service source and sink boards in insert mode and the intermediate sites in transparent mode.

Measured by the 0/1 sequence change of PM/ICM bytes in the OM overhead

PM is used to measure the E2E latency of customer services

163. A company accesses the network through optical fiber, and the total bandwidth applied for is 100 Mbit/s. There are 4 departments in the company, of which Department A and Department B access the network through Ethernet dedicated lines, and Department C and Department D access the network through Ethernet private networks. Each department has its own guaranteed bandwidth, but can burst to occupy the idle bandwidth on the link. In addition, the various services within each department have their own independent QoS requirements.

Based on the above description, which typical application scenario of HQoS does this correspond to?

Multiple service classes for a single user share bandwidth

Single user sharing service bandwidth

Multiple service access points of a single user share bandwidth

Multiple users share service bandwidth

164. A service passes through two wavelength division rings. The two wavelength division rings are tangentially networked. The tangential network elements share the electronic rack. It is required to implement segmented ODURSKCP protection, that is, the protection is interrupted once for each fault in each ring. Which of the following types should be configured?

SNC/N

SNC/S or SNC/N

SNC/S

SNC/1

165. Access point failure and service network failure can trigger the LPT function. WDM equipment can switch services to backup links for transmission in different corresponding ways to ensure normal services.

Which of the following corresponding methods does the wavelength division device not support?

Shut down the laser at the end of the wavelength division

How to turn off the laser on the client-side port

Alternate switching of lasers at the customer side

Client-side port insertion signal mode

166. Which of the following WDM paths does not support deletion from the network management side?

OTS Road

Client path

OCh Pathway

OMS path

167. Which of the following devices does not support PCM features?

OSN 2500

OSN 7500

OSN 550

OSN 3500

168. Which of the following descriptions about the delay of storage and forwarding equipment is wrong?

The last bit of the data frame enters the device and starts timing

The first bit of the data frame appears at the output port and the timing ends

The first bit of the data frame enters the device and starts timing

Reflects the performance of network equipment, usually not compared with bit forwarding equipment

169. For OSN series equipment, when the standby board is normal, which of the following operations will not cause the master-slave switchover of the cross or clock board?

Hard reset the crossbar or clock motherboard

Logically delete the main crossbar and clock board

The upper and lower handles of the main board are opened at the same time

Issue the master/slave switch command

170. Which of the following descriptions about ODUk ring network protection is wrong?

For enhanced ODUk ring network protection, there is no need to set a management node. Setting a management node has no effect on the protection.

The protocol can be started only after the protection configuration of each station on the ring network is completed.

ODUk ring network protection is mainly used in ring networking for distributed services. It protects multiple distributed services between all sites by occupying two different ODUk channels.

Ordinary ODUk ring network protection does not require the setting of a management node.

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171. When using OSN8800 T32, if you need to set the ID number of the master and slave subracks, which board should you set it on?

EFI

EFl1

EFl2

SCC

172. Which of the following descriptions of equipment operation is wrong?

Wear anti-static wrist straps or gloves during operation to prevent static electricity from damaging the board.

CLASS 1M means the light power is low and will not cause harm to eyes or skin

The dust screen needs to be cleaned regularly to facilitate heat dissipation

The equipment needs to be safely grounded

173. When protection switching occurs in a 25GMSP ring consisting of four MSTP sites.

Which of the following statements about police reporting are correct?

PS alarms are reported on the tributary board

APS-INDI alarm is reported on the XCS board

Report APS-INDI alarm on the system control board

Report APS-INDI alarm on the board

174. AAC address consists of 46 bits and is globally unique.

Which of the following is the meaning of a MAC address with the eighth bit set to 1?

Unicast address

Double-click the address

Multicast address

Broadcast address

175. Which of the following statements about extended ECC is wrong?

Extended ECC is divided into automatic extended ECC and extended ECC in the specified mode

Automatically extend ECC to connect the Ethernet ports of two network elements using a straight-through cable.

Extended ECC in designated mode means that the server and client need to be designated.

Automatic ECC expansion can be enabled on up to four network elements. In manual ECC expansion mode, each server can connect to up to three clients.

176. The optical monitoring channel is used for monitoring WDM optical transmission systems. In the UU-T recommendation, the 1510nm wavelength with a () rate is preferred.

64kbit/s

192kbit/s

2Mbit/s

576 kbit/s

177. The signal frequencies allowed in ITU-TG692 Recommendation are based on the reference frequency () and the channel spacing can be 100 GHz, 50 GHz or 25 GHz.

192.1 terahertz

1931 Terahertz

194.1 THz

196.1 terahertz

178. Which of the following is the meaning of "L" in the optical module parameter "L-642"?

Transmission distance

Dispersion coefficient

Emission wavelength

Receiving wavelength

H12-931_V2.0 HCIE-Transmission Exam Free Dumps

H12-931_V2.0 HCIE-Transmission Exam Free Dumps

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