Get Certified Easily with Online H31-341_V2.5-ENU Dumps

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August 31, 2023

Using HCIP-Transmission V2.5 H31-341_V2.5-ENU questions can help you build confidence as you prepare for the exam. By practicing with these H31-341_V2.5-ENU dumps questions, you will be better prepared and more confident when you take the actual exam. Besides, H31-341_V2.5-ENU exam dumps questions cover a wide range of topics that are relevant to the certification exam. By using H31-341_V2.5-ENU dumps questions, you will be able to ensure that you have a comprehensive understanding of the material covered on the exam. Practice free Huawei H31-341_V2.5-ENU exam dumps below.

Page 1 of 31

1. Which of the following descriptions about the TMK1UNS5 board is wrong?

Support mixed transmission of ODUO, ODU1, ODU2, ODU2e, ODU3, ODU4, ODUflex.

This board belongs to the unified line board, and the current version supports mixed transmission of OTN service, SDH service and packet service.

It supports relay mode, which can be used in the electrical relay station in the system to realize the electrical relay function of the corresponding optical signal.

Support the transmission of OTN services whose total bandwidth does not exceed 200 Gbit/s.

2. Which of the following is the frame structure of STM-16?

9*270*1

9*270*4

9*270*16

9*270*64

3. In the non-converged OTU processing SDH standard signal scenario, both A and B are WDM sites. The client side of the OTU at station A detects an RLOS alarm. The client side of the station detects and reports the REM_SF alarm, and station B transmits the signal to its downstream client device, and reports the R_LOS alarm to the client device.

True

False

4. Which of the following statements about MST functional modules are correct? (Multiple choice)

MST is both a source and a sink for M

MST implements BIP-8 statistical calculation of B2 bytes

MST returns bit error information. But does not return a specific number of bit errors

MST provides E2 orderwire channel

5. When the bridge uses IV L learning mode. Create an entry in the MAC address table based on the original MAC address and original port of the data frame. This entry applies to all VLANs

True

False

6. Which of the following performances do not need to be evaluated when expanding the wavelength division system of the existing network?

PMD parameters of the link

Bit error rate before error correction of OTU at the receiving end

Optical power flatness at the receiving end (with MCA configured)

7. The number of ODU2e signals multiplexed into ODU3 signals is the same as the number of ODU2 signals multiplexed into ODU3 signals.

True

False

8. In the maintenance process, after reconfiguring a network element, special attention should be paid to setting the network element time of the network element to the current time, otherwise the network element will work in the default time, and the default time is not the current time time

True

False

9. Which of the following boards belong to the wavelength conversion board of OptiXtrans DC908 equipment? (Multiple choice)

MS04

MD02

LDC

MD02A

10. The value range of AU-PTR is 0~782. Which of the following alarms will be generated when the receiving end receives invalid pointer value for 8 consecutive frames?

AU-AIS

AU-LOP

MS-AIS

MS-RDI

Page 2 of 31

11. The manual reset at the equipment site is hard reset.

True

False

12. Some SNCP protection switching conditions are default. For example, AUAIS and TUAS. Other conditions are optional. For example, HP-TIM and HP-SLM. Optional conditions can be flexibly set according to the service level.

True

False

13. Which of the following is the common point between the two-fiber bidirectional multiplex section shared protection ring and the four-fiber bidirectional multiplex section protection ring?

Section switching

Agreement required

The multiplex section protocol travels on the protection channel

The network capacity is KSTM-N

14. Which of the following alerts will not trigger an AU-AIS alert?

R_LOS

MS_AIS

AU_LOP

B2_EXC

15. While amplifying business signals, EDFA will also bring noise to the system, which is the main source of noise.

True

False

16. Which of the following descriptions about the FOADM site is wrong?

Serial FOADM can realize full wave up and down, but parallel FOADM cannot

Parallel FOADM will not interrupt the existing channels during expansion, and can realize online expansion

The initial cost of parallel FOADM is higher than that of serial FOADM

Operation and maintenance personnel are required to go to the site for support when serial FOADM is expanded

17. When the OSN 8800 device needs to access GE signals, Which of the following are the boards that can be used? (Multiple choice)

TOA

TDX

TEM28

TSC

18. In the ITU-TG692 recommendation, the allowed signal frequency is based on the reference frequency () The channel spacing can be 100GHz.50GHz or 25GHz.

192.1 terahertz

1931 Terahertz

194.1 terahertz

196.1 terahertz

19. Which of the following light sources has the best dispersion tolerance and stability?

Directly modulated light source

EA modulated light source

Mach-Zehnder modulated light source

None of the above

20. Which of the following overhead bytes in VC4 high-order path overhead is functionally similar to the low-order path overhead byte V5 in VC12? (Multiple choice)

Page 3 of 31

21. Which of the following ROADM nodes are configured correctly? (Multiple choice)

WSMD9

WSD9+RMU9

WSM9+RDU9

WSM9+WSD9

22. If the intermediate leveling method is used, the adjustment target of the single-wavelength optical power at the transmitting end and the receiving end is to keep the flatness of the single-wavelength input optical power within the range of the nominal single-wavelength input optical power?

±4dB

±1dB

±3dB

±2dB

23. If a network port that supports auto-negotiation is connected with a network port that does not support auto-negotiation, half-duplex to full-duplex may occur.

True

False

24. Which of the following difference between a wide area network and a local area network is correct?

The WAN is mainly accessed through a low-speed serial interface

Wide area network provides high-speed multiple access services

WANs typically exist within a small geographic area

WAN uses tokens to control network traffic

25. Reasons which is impossible for OTN equipment and network elements to be disconnected frequently?

When using optical monitoring, the DCC mode setting is wrong

Using electrical monitoring, the line quality is not good

NE ID conflict

Users of the same network element log in to the network element at the same time

26. FXS and FXO are the names of ports used by analog telephone lines. FXO and FXS are always used in pairs.

True

False

27. It is not recommended to configure the EPLAN service as a ring. If the EPLAN business is configured as a ring network, the STP protocol must be enabled on the network to prevent broadcast storms.

True

False

28. Which of the following descriptions about OTU4 frame rate calculation is correct?

255/238 × 2488320 kbit/s

255/237 × 9953280 kbit/s

255/236 × 39813120 kbit/s

255/227 × 99532800 kbit/s

29. Gain is an important index of fiber amplifier, and its unit is decibel.

True

False

30. When using a script to back up U2000 data, the backup speed is very fast because the backup file is small.

True

False

Page 4 of 31

31. The key to NG WDM system fault location is to accurately locate the fault to a single station.

True

False

32. Optical fiber and LEAP optical fiber systems, 1006 and 106 mixed transmissions need to set up isolation bands, and only one-sided adjacency is supported, and double-sided adjacency is prohibited. 100G is preferentially configured with long wavelengths, and 10G is configured with short wavelengths.

True

False

33. Which of the following is not an optical layer single board in a WDM network?

Business processing board

Optical add-drop multiplexing single board

Optical monitoring channel board

Spectral analysis board

34. 64K and SNCP support internal port access and external port access. In the external port access mode, the cross-connection between the DXM board and the SP3D board needs to be configured through the network management system.

True

False

35. Which of the following descriptions about the TNF6TTA board is correct? (Multiple choice)

When the service on the client side is STM-64, the port working mode can be set to ODU2 non-aggregation mode.

The total bandwidth is 40 Gbit/s, supporting 20 ODU0, 10 ODU1/ODUflex, and 4 ODU2/ODU2e signals to realize cross-scheduling of services through the backplane bus and the cross-connect board.

When the service on the client side is GE, the port working mode can be set to ODU0 non-aggregation mode.

When the service on the client side is HD-SDI, the port working mode can be set to ODU1 non-aggregation mode.

When the customer service is 3G-SDI, the port working mode can be set to ODUflex non-aggregation mode.

36. Which of the following boards can be inserted into the OSN 9800 U64 subrack?

TNF5UNQ2

TN18LSC

TN54GS4

TNV1N401

37. The dispersion caused by the two orthogonal polarization states of signal light having different propagation speeds in the optical fiber is called polarization mode dispersion.

True

False

38. Which of the following alarms can trigger the 1+1 protection on the client side? (Multiple choice)

OTUk_LOF

ODUk_PM_AIS

ODUk_PM_OCI

ODUk_PM_LCK

39. MPLS-TP is a subset of MPLS, which removes the connectionless IP-based forwarding and adds the end-to-end OAM function.

True

False

40. The only functional difference between OPSA and OPSB is that OPSA has ( ) after the splitter, while OPSB does not.

Page 5 of 31

41. Which of the following items does the basic structure of a WDM system include? (Multiple choice)

Optical wavelength conversion unit

Optical Amplifier

Wavelength division multiplexer

Optical/electrical monitoring channel

42. The OptiX NG WDM device only supports the global label control, and the size of the label control is 32768.

True

False

43. In the WDM system, if the TTI to be sent by the SM layer is inconsistent with the TTI to be received, an ( ) alarm will be reported.

44. OSN 8800 equipment adopts fan redundancy protection. When any fan in the fan box is broken, the system can still run normally for a long time.

True

False

45. In the OSN 1800, the LOA single board can implement the Layer 2 scheduling function of the Ethernet.

True

False

46. The parameter C of G652 DCM-C indicates how much KM G.652 can compensate for the dispersion?

Can compensate 60KM

Can compensate 40KM

Can compensate 80KM

Can compensate 20KM

47. Which of the following is a function of the TCM overhead in the ODUk signal?

Channel Monitoring Fee

Path tracing identifier overhead

Tandem Connection Monitoring Overhead

General communication channel overhead

48. The strength of the nonlinear effect of optical fiber is related to the optical power entering the fiber, the spectral width of the optical signal, and the characteristics of the modulation code pattern, and has nothing to do with the dispersion coefficient of the optical fiber and the number of spans.

True

False

49. Which of the following description of the principle of automatic protection switching of the standard SSM protocol are correct? (Multiple choice)

The network element broadcasts the clock quality information of the synchronization source to the downstream station through the s1 byte. And through the S1 byte, the clock quality from the local network element is "not available for synchronization" to notify the Shangxi site in the reverse direction along the direction of the synchronization source.

If there are multiple clock sources with the highest quality level; the network element selects the clock with the highest clock priority as the synchronization source.

The network element first selects the clock with the highest quality level from the available clock sources as the synchronization source according to the clock source priority table.

The network element broadcasts the clock quality information and clock source ID of the synchronization source to the downstream station through the S1 byte, and reversely notifies the upstream station along the direction of the synchronization source through the S1 byte that the clock quality from this network element is "unavailable Synchronize".

50. Which of the following descriptions about the user-side interface and network-side interface of the E-Line service is correct? (Multiple choice)

The interface on the user side is a layer 2 port, and the interface on the network side is a layer 3 port

The interface on the user side is a layer 3 port, and the interface on the network side is a layer 2 port

The interface on the user side is NNI, and the interface on the network side is UNI

The interface on the user side is UNI, and the interface on the network side is NNI

Page 6 of 31

51. The frame period of the OTN signal is fixed. It is the same as the frame period of the SDH signal.

True

False

52. OTU_LOM is an alarm generated due to the out-of-multiframe (OOM) state lasting for 3ms.

True

False

53. Please put the correct answer into the corresponding number position in the picture.

54. The number of bit error blocks on each VC4 channel is detected by B3 at the receiving end. At the same time, the information which is sent back to the sending end through Q HP-REI and HP-FEBBE report at the sending end?

K3 (b1-b4)

G1 (b5-b8)

G (61-64)

J (b1-64)

55. When using scripts to back up and restore U2000 network configuration data, the directory for saving exported files can be changed.

True

False

56. Using the OTU board with FEC function can improve the performance of the system in many aspects. Which of the following descriptions are correct? (Multiple choice)

Can balance the optical power of the system

Can improve the tolerance of the system to noise

It can provide early warning of system performance degradation

Can increase the length of the single span of the system

57. The overhead ratio is a factor that affects the error correction capability of FEC technology. Generally, under the same FEC encoding/decoding algorithm conditions, the higher the overhead ratio, the greater the net coding gain

True

False

58. Which of the following belongs to the optical layer part of the OTN frame structure? (Multiple choice)

OMS

OCh

ODUk

OPUk

59. In the same ASON network, which of the following parameters can uniquely identify an intelligent network element within the scope of the intelligent domain?

Network element IP

Network element ID

Node ID

60. What are the options for the following alarms to be transmitted from upstream to downstream? (Multiple choice)

AIS

LCK

BEI

Page 7 of 31

61. The OTN circuit board of OSN 1800V (such as: ND2) can reflect the high or low optical power of the receiving end at the local end through the status of the indicator light on the panel.

True

False

62. Coherent reception uses a local oscillator laser of the same frequency to perform coherence with the received optical signal, and which of the following information is recovered from the received signal? (Multiple choice)

phase

Polarization state

Amplitude

frequency

63. Which of the following boards does not provide online detection of optical signals at the MON port?

OAUI

WSMD4

TTA

FIU

64. Among the working modes provided by the line fiber quality monitoring function, which one is not included?

Intra-office mode

Near-end mode

Automatic mode

Manual mode

65. Which of the following descriptions about optical line protection and ODUk SNCP protection is wrong?

Optical line protection is switched by the OLP board, and ODUk SNCP protection is switched by the cross-connect board

Optical line protection and ODUk SNCP protection are both single-ended switching. When a single fiber fails, the sending and receiving routes will be inconsistent

Optical line protection belongs to network-level protection, and ODUk SNCP belongs to service-level protection

The switching time of optical line protection and ODUk SNCP protection is less than 50 ms. In order to avoid cable disconnection, multiple switching is triggered, and the two protections cannot coexist

66. The alarm detection of the optical layer overhead is realized through the optical layer overhead OOS. Which of the following descriptions about the optical layer overhead alarm is correct?

As long as the optical monitoring channel is enabled, the optical layer overhead alarm can be reported

Optical layer overhead alarms are automatically reported by default

Whether the optical layer overhead alarm can be accurately reported has nothing to do with the logical fiber connection configuration of the system

The WDM system does not enable the optical monitoring channel, and the optical layer overhead alarm cannot be reported

67. Dividing VLANs can prevent broadcast storms and improve network efficiency. It makes the network more secure.

True

False

68. Which of the following descriptions about the TNV2E224 board is correct? (Multiple choice)

Support VPWS and VPLS services.

It is used in conjunction with the system-circuit board, and the cross-scheduling granularity between branch line boards is Packets.

On the U64 standard/U64 enhanced/U32 standard subrack, the backplane bandwidth is 200 Gbit/s

PHY loopback is supported, but MAC loopback is not supported.

69. In the WDM transmission system, the main factors affecting the unevenness of the power balance of each channel do not include? (Multiple choice)

Inhomogeneity of insertion loss of each channel of multiplexer/splitter

The setting of the main channel dimmable attenuator is unreasonable

High cable attenuation

EDFA gain unevenness

70. Which of the following options can reduce the impact caused by nonlinear effects in WDM systems? (Multiple choice)

Use high performance optical fiber

Controlling Optical Power

Dispersion management

Advanced Lighting Technology

Page 8 of 31

71. The transmission plane mainly completes functions such as optical signal transmission, multiplexing, configuration protection switching, and switching and connection. And ensure the reliability of the optical signal transmitted. However, the exchange action at this layer is carried out under the action of the management plane and the control plane.

True

False

72. G707 multiplexing circuit diagram can only multiplex 2M34M140M signals into STM-N.

True

False

73. The gain wavelength of the fiber Raman amplifier is determined by the wavelength of the pump light. As long as the wavelength of the pump source is appropriate, the signal amplification of any wavelength can be theoretically obtained.

True

False

74. The algorithm based on IP address allocation belongs to the hash algorithm used in LAG load sharing.

True

False

75. Compared with traditional SDH network, what are the characteristics of ASON network? (Multiple choice)

Support Mesh networking protection, which enhances the survivability of the network.

Support traffic engineering control, the network can dynamically adjust the logical topology of the network in real time according to the business needs of the customer layer; realize the optimal configuration of network resources.

Support automatic topology discovery

Support end-to-end service automatic configuration

Support differentiated services, and determine the required protection level according to the service level of the client layer signal.

76. Which of the following are device types support the master-slave sub-architecture mode? (Multiple choice)

OSN 8800

OSN 1800V

OSN 9800

77. Among the following suggestions, which of the following protocols are related to WDM? (Multiple choice)

G671

G681

G691

G692

78. Which of the following is the effect of changing the network element ID of OSN3500 on the NMS?

Disruption of service

Restart the device

Network element communication interruption

NE time out of sync

79. In the link dynamic aggregation scenario, which of the following descriptions about the LACP protocol is correct? (Multiple choice)

Adding and deleting member ports needs to run the LACP protocol

LACP protocol supports setting the minimum link activation number of LAG

The LACP protocol does not support setting the minimum number of link activations for LA6

Adding and deleting member ports does not need to run the LACP protocol

80. Which of the following statements about basic LCAS functions are true? (Multiple choice)

Automatic discovery of new network elements and links

Bandwidth increases or decreases dynamically.

Failed members are protected and recovered

Provide a fault-tolerant mechanism to enhance the robustness of the virtual cascading function

Page 9 of 31

81. In the WDM system, if the receivable TTI is inconsistent with the actual received TTI, what alarm will be reported?

OTUk_TIM

OTUK_LOF

OTUK_LOS

OTUK_TTI

82. Which of the following options are the conditions for ODUK SNCP switching? (Multiple choice)

OSC_LOS

R_LOS

The main control module fails

OTUK_LOF

83. One SCC board and one PANEL board can be configured on the Optixtrans DC908 machine box, or it can be configured as 1+1 dual master control.

True

False

84. Regarding the frame structure of SDH signals, which of the following statements are correct? (Multiple choice)

SDH signals with different rates have different frequencies

The frame periods of different SDH signals are the same

The information payload area only carries the information payload

The SDH signal is byte-interleaved by column

85. Which of the following comparisons between commonly used optical fibers G.652 and G.655 is correct? (Multiple choice)

AG52 has a larger core diameter than G.655

The chromatic dispersion coefficient of BG52 is smaller than that of G.655

CG52 can withstand higher fiber input power than G.655

The attenuation coefficient of DG52 is lower than that of G.655

86. The UITL board belongs to the optical multiplexing and demultiplexing boards. The UITL board realizes the multiplexing and demultiplexing of () GHz interval and () GHz interval signals.

87. 40 Gbit/s non-coherent and 100 Gbit/s coherent mixed transmission WDM systems can add DCM modules according to actual conditions.

True

False

88. The OTS path refers to the physical fiber connection between two adjacent OM/OD/OA on the main optical path.

True

False

89. Use the following methods to create an OCh path. After creation, which of the following need to search for the path? (Multiple choice)

Single plate method

Path method

Single station method

90. Before equipment commissioning, we need to check the hardware installation. What are the main items? (Multiple choice)

Check the standardization of cable layout

Cabinet Installation Inspection

Check the subrack

Cabinet door installation inspection

Page 10 of 31

91. The resources between single-board optical cross-connect configuration and single-site optical cross-connect configuration functions are mutually exclusive. Service scheduling of this wavelength of the board.

True

False

92. The MOTUm interface completes the ODUPM overhead encapsulation before the ODUK-TCM encapsulation in the sending sea?

True

False

93. What are the following steps for low-speed services to be multiplexed into high-speed SDH services? (Multiple choice)

Mapping

Overhead Insertion

Positioning

Multiplexing

94. What are the functions completed by the SDH overhead bytes? (Multiple choice)

Bit error detection

Pointer positive adjustment

Frame alignment

Channel Tracking

95. Which of the following monitoring boards can be used with SFIU? (Multiple choice)

ST2

SC1

AST2

SC2

96. The main difference between the functional standardized optical transport unit OTUkV and the fully standardized optical transport unit OTUk lies in the allocation of FEC areas.

True

False

97. When the working PQ1 board fails, the device will perform TFS protection switching.

Which of the following statements about the switching process are true? (Multiple choice)

The cross-connect board detects the failure of the PQ1 board through the board status bus

If the protection PQ1 board is normal, the cross-connect board sends a switching message to the D75S corresponding to the faulty PQ1 board through the switch control bus

The D75S board responds to the switchover message by transmitting service to the shared protection bus and stopping sending service to the failed PQ1 board

The protection PQ1 board receives and processes the services transmitted from the D76S board to the protection bus to complete protection switching

98. MPLS technology can be nested in multiple layers. There is no limit. It is only limited by (). It has good scalability.

Which of the following is correct?

VLANs

Ethernet packet length

The processing power of the equipment

Latency issues

99. WDM system fault location follows the principle of first locating the outside, then the inside; first locating the network, then locating the network element; first (), then unidirectional;

100. Which of the following IP addresses belong to private network IP addresses? (Multiple choice)

10.0.0.1

192.168.0.1

10.255.0.1

172.128.0.1

Page 11 of 31

101. The gain of the OAU single board is 23db, and 1% of the total output power of the OAU single board is used for MON detection. Now the output optical power of the MON port is tested to be - 8dbm, and the input optical power of the IN port of the OAU single board is?

-11dbm

-13dbm

-15dbm

-21dbm

102. Which of the following are necessary prerequisites for creating a bidirectional MPLS Tunnel? (Multiple choice)

The user has "Administrators" and above network management user rights

The LSR ID of each network element has been correctly configured

Determine MPLS Tunnel Bandwidth

The port properties have been correctly configured

103. The output network requires a higher cost than the belt network. But provides a more reliable management channel.

True

False

104. TEM28 is an Ethernet aggregation tributary board. Which of the following descriptions about the TEM28 single board are correct? (Multiple choice)

TEM28 can simultaneously access FE, GE, 10GE LAN and 10GE WAN services through different ports

The electrical signal can output ODUO, ODU1flex, 00U1 or ODU2 signals after encapsulation and mapping processing, OTN framing and other operations and send them to the backplane for cross-connect scheduling.

The TEM28 board supports the L2 switching module, and the Port to VCTRUNK service needs to be configured

RX1/TX1~RX4/TX4 ports are 10GE optical ports, which can handle 10GE LAN/10GE WAN services, and other ports are GE optical ports, GE electrical ports or FE electrical ports, which can handle GE or FE services.

105. There are two types of reset boards () and ().

106. If a bit error is detected in the B1 byte, which of the following alarms will be reported by the peer end?

MS-AIS

RS-BBE

RS-FEBBE

Not reporting

107. Which of the following statements about the definition of SDH is correct?

Hierarchies available for asynchronous digital transmission

Hierarchy of standardized digital signals that can be multiplexed asynchronously

Hierarchy of standardized digital signals that can be cross-connected asynchronously

Complete standard digital signal hierarchy provides simultaneous digital transport multiplexing and cross-connection

108. About the comparison between Raman amplifier and EDFA. Which of the following statements is wrong?

Raman amplifiers can amplify signals of different bands by selecting different pump sources, so Raman amplifiers have no gain bandwidth limit in theory, while EDFA has a range of gain bandwidth.

The gain calculation/test method of Raman amplifier and EDFA is consistent with "gain = output power - input power"

The gain medium of Raman amplifier is transmission fiber; while the gain medium of EDFA is EDF (doped fiber)

The equivalent noise figure of the Raman amplifier is smaller than that of the EDFA

109. MPLS label consists of which of the following parts? (Multiple choice)

EXP

Label

TTL

110. The LPT (LinkPassThrough) function is applied to the scenario where WDM equipment accesses FE/GE/10GELAN services. Which of the following are the correct statement? (Multiple choice)

It makes the user equipment perceive the link status information by turning off the group and turning on the laser of the WDM device, thereby triggering the user equipment to enable the service protection function and select the active or standby link for communication

From the perspective of the network, ALS has similar functions to LinkPaseThrough (LinkPaseThrough), and the differences are mainly reflected in the transmission mode of applicable service faults and the laser restart mechanism.

The LPT function can be divided into port-based LPT and service-based LPT in terms of implementation methods.

By adding overhead bytes supporting the LPT protocol to the signal frame format on the WDM side, the operating status of the network access point or service network can be monitored

Page 12 of 31

111. The fully standardized optical transport unit OTUK is an OTUk frame that fully complies with ITU-T G.709 recommendations, and it has the precise field format, field size and type specified in ITU-T G.709.

True

False

112. Among OTN network interfaces, the internal network interface of the same operator is an intra-domain interface. The intra-domain interface is divided into indirect laVI of different manufacturers' equipment and IrVI of the subnet interface of the same manufacturer's equipment according to different equipment manufacturers.

True

False

113. Ring multiplex section protection utilizes K1 and K2 bytes to transmit switching requests to realize automatic protection.

True

False

114. Which of the following descriptions about the business boundary label is correct? (Multiple choice)

When the service demarcation label is User, Ethernet frames with VLAN are not allowed to be inserted.

When the service boundary label is User, it means that the user access mode is Ethernet. PE equipment does not recognize and process U-TA

When the industry boundary label is Service, it is not allowed to access the Ethernet frame with VLA

When the service demarcation label is Service, it means that the user access mode is VLA

The PE device will identify and process the TAG according to the PW encapsulation mode.

115. Which of the following statements about solving the system OSNR limitation problem is correct? (Multiple choice)

Use advanced modulation and coding technology to reduce baud rate and improve OSNR tolerance.

Coherent reception using local oscillator lasers of the same frequency to interfere with the received optical signal improves OSNR tolerance

The enhanced HFEC error correction code is used to improve the OSNR by nearly 1 dB compared with AFE

Use low noise figure NF, high performance EDFA and Ramani amplifier board as follows N13OAU106 or TN11RAU106 to improve the receiving OSNR of the system.

116. The technology of recovering amplitude, phase and polarization state information from the received signal by using which of the following characteristics of the laser to coherent with the received optical signal is called coherent receiving technology?

Vibration in the same direction

Same amplitude

The direction of vibration is opposite

same frequency

117. NG WDN ASON network can provide services of different service levels according to different levels of customer needs. The electrical layer ASON at the WDM service layer supports three different SLA levels: diamond, silver, and copper

True

False

118. It is possible to convert ordinary WDM services to ODUk SNCP services, but the conversion of ODUk SNCP services to ordinary WDM services will cause service interruption

True

False

119. When light passes through a passive optical device, the drop in optical power caused is called the () of the device.

120. Which of the following alarms will trigger optical line protection switching? (Multiple choice)

POWER DIFF_OVER

R_LOF

MUT_LOS

R_LOS

Page 13 of 31

121. Which of the following statements about LSR-ID is correct? (Multiple choice)

When planning the LSR-ID, the LSR-ID of different network elements in the same network cannot be repeated

If the site has already carried the PW service, the LSR-ID cannot be modified.

Only after configuring the OCh channel of the optical layer can the LSR-ID be set

LSR-ID can be modified at any time without affecting the business

122. Among the following cabinet types, which ones can be installed with 0ptiXtrans E9624 subracks? (Multiple choice)

A63B

APM3000

APM5000

A66B

123. It mainly completes the point-to-point voice communication between adjacent stations, without dialing, and it can be connected immediately after off-hook. This PCM service is called?

Sub-rate service

Z interface extension service

FXS Hotline Service

E&M relay service

124. What are the common fault types of NG WDM? (Multiple choice)

Business Interruption Faults

Business transient failure

Abnormal optical power faults

Bit errors

Communication failure

Protection fault

125. Which of the following clock operating modes supports the ITU-TG781 standard? (Multiple choice)

Tracking

Keep

Run free

Master/slave

126. The path that data packets pass through in an MPLS network is called a label switching path (LSP). Which of the following descriptions about LSP is wrong?

Like Ingress, there is only one Egress in an LSP, and both are LERs

Transit is the intermediate node of LS

Its main function is to look up the label forwarding information table and complete MPLS packet forwarding through label switching.

Transit is an intermediate node of LSP, and its position in LSP is indispensable

Ingress is the starting node of LSP, an LSP can only have one Ingress

127. Which of the following descriptions about the DWSS20 board is correct? (Multiple choice)

Support the optical power query function of DM01~DM20, AM1~AM20 and IN/OUI optical ports on the network management system.

It can realize the optical power adjustment function for each wavelength in the sending direction and receiving direction.

For the pass-through service, only one pair of optical fibers needs to be connected in the two directions.

It can realize the multiplexing and demultiplexing functions of coherent signals and non-coherent signals.

128. How many 64K services can a 2M bandwidth support at most?

129. Both the extended ECC and the ECC physical layer use the DCC channel.

True

False

130. OptiXtrans E9600/optiX OSN 9800 has a large cross-connection capacity and is mainly used in the metropolitan area/aggregation layer, while the OptiXtrans E6600/OptiX oSN 1800 has a small cross-connection capacity and is mainly used in the metropolitan area edge/access layer

True

False

Page 14 of 31

131. HONET integrated service access network belongs to () access mode

132. Which of the following options meet the characteristics of ROADM networking? (Multiple choice)

When upgrading services, existing services may not be affected

Low cost of network construction

During network maintenance, wavelength services can be modified quickly and efficiently, saving maintenance costs

With power equalization function, it can realize power equalization at channel level

133. Which of the following options matches the meaning expressed by "the liquid length carrying the local service can be transmitted to any direction"?

Directioned

Colorless

Directionless

Colored

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

3.3V power supply undervoltage

Abnormal 58M crystal oscillator

Abnormal chip (SD538, SA527, CPLD)

Report T_LOSEX on the working branch board

135. Which of the following are the classification of Ethernet performance test? (Multiple choice)

Network Equipment Performance Verification Test

Network performance testing

Custom Tests

136. Which of the following ITLI-T recommendations define the OTN frame structure?

AG694

BG652

CG975

DG709

137. The LER in the MPLS network is a kind of LSR located at the edge of the network.

True

False

138. After which of the following steps, the rollback operation cannot be performed?

load b. to distribute

to activate

Submit

139. Which reason for the OA_LOW_GAIN alarm is wrong?

The input optical power of the board is too high

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

The board that reported this alarm is faulty

The gain of the optical amplifier board is set too low

140. Equipment maintenance personnel can judge whether the equipment has ever failed by observing the indicator lights on site. But the disadvantage of this method is that the information is vague and inaccurate.

True

False

Page 15 of 31

141. ITU-T stipulates, what is the switching gain requirement of the Raman amplifier equal to how many DB?

142. In the PW FPS scenario, which of the following descriptions about switching conditions and configurations is correct? (Multiple choice)

PW FPS must be configured symmetrically (configured at both ends)

The replacement condition depends on the state of the APS protocol

The switching condition depends on the OAM status of the working/protecting path

PW FPS can be configured asymmetrically (configured at one end and not at the other end)

143. During the commissioning process, it is necessary to ensure that the input optical power of the OTU board is lower than the overload point to avoid burning the optical module or affecting performance. In particular, the overload point of the PIN optical module is very low. Before the actual optical power is measured, the optical fiber is required to be inserted or not inserted.

True

False

144. Currently, 2Mbit/s signals are most widely used. Which of the following steps are involved in the process of multiplexing 2Mbit/s signals into STM-N? (Multiple choice)

Rate adaptation

Join Pointer

Add segment overhead

Scrambling

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

The cross granularity is GE or Any signal

When configuring branch SNCP, you need to set the subtype of SNCP

Tributary SNCP protection uses the dual-send and selective-receiving function of the electrical layer crossover to protect the client-side services connected to the tributary board

The trigger conditions are that the board is not in place, SF, SD

146. NSA is a 100G line service processing board. which of the following description about the NS4 single board is wrong?

The wavelength of the optical signal on the WDM side is adjustable within the range of 80 wavelengths at 50GHz intervals in the C-band.

The MS4 board does not support the ODUI service crossover between the centralized crossover bus and the ND2 board

Support 80-channel ODUO/ODUflex or A0-channel ODU1 or 10-channel ODU2/ODU2e or 2-channel ODU3 or 1-channel ODU4 signal and cross-connect board to realize cross-scheduling of services.

It can be used in electrical relay stations to realize the electrical relay function of corresponding optical signals.

147. There are many factors affecting the transmission distance in NG WDM system, which of the following will not affect the transmission distance?

Optical line dispersion

OSC independent monitoring channel

Optical line loss

Fiber nonlinear effect

148. Which of the following are the limitations of the alarm and performance analysis methods? (Multiple choice)

On-site maintenance personnel cannot know the current operating status of the equipment.

The network management personnel cannot obtain the current alarms of the device, the alarm occurrence time, and the historical alarms of the device.

When some faults occur, there may be no obvious alarms or performance events to report, and sometimes no alarms or performance events can even be found.

In the case of complex networking, services, and fault information, a large number of alarms and performance events may be generated with the occurrence of faults. Due to too many alarms and performance events, maintenance personnel cannot start analysis.

149. The OLT is connected to the switch through (), using the V5.2 interface protocol

150. Which of the following statements are true about the EFS4 circuit board? (Multiple choice)

The board has four FE ports

The board supports Layer 2 switching

This board must be used with the processing board

The board interface is LC interface

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151. The segment overhead of STM-4 is () bytes/frame.

9*9*4

9*8*4

9*9*8

9*8

152. Which of the following protection schemes does not require subnet configuration before subsequent protection operations when you configure services on a per-NE basis?

MSP

SNCP

MSPs and SNCPs

LMSP

153. If the cumulative amount of dispersion exceeds the system's dispersion tolerance, it will cause bit errors at the receiving end.

True

False

154. The VLAN domain can isolate the unicast packets of different users and also isolate the broadcast packets of different VLANs.

True

False

155. Which of the following paths have nothing to do with business?

OCh

OSC

Client

ODUk

156. After successfully deploying the PWE3 service, the "deployment status" of the PWE3 service is displayed?

Deployment b. is activated

Deployed

to activate

157. There are two types of PW encapsulation modes () and ()

158. If you only need to use LAG for port-level protection, configure non-load-sharing LAG in the board.

True

False

159. In the electrical layer application scenario of end-to-end tributary board interconnection, what are the interconnection requirements for tributary boards? (Multiple choice)

FEC working status is the same

Same type of business

Same optical channel

The business mapping path is the same

160. A communication network is a system that interconnects geographically dispersed user terminal equipment to realize communication and information exchange. It is mainly composed of user equipment and transmission equipment.

True

False

Page 17 of 31

161. ODUk SNCP protection subtypes include (), () and ().

162. Mapping is a process of adapting tributary signals into () at the SDH network boundary

163. For optical amplifiers and regenerators, which of the following are correct? (Multiple choice)

Higher regenerator cost

When the regenerator works at a specific bit rate and a specific frame format

Where the amplifier can work at any bit rate and frame format

Optical amplifiers are rarely used and regenerators are commonly used

164. The instrument test method is generally used to eliminate external problems of transmission equipment and docking problems with other equipment.

True

False

165. Which of the following is not included in the basic architecture of MPLS L2VPN?

Tunnel

S-VLAN

166. STM-N signals are transmitted on the line through scrambling mainly to facilitate the receiving end to extract line timing signals. All bytes in the SDH frame structure will be scrambled.

True

False

167. After the network sends a fiber cut, which of the following alarms does not appear when 1+1 linear multiplex section protection is configured?

R_LOS

APS_INDI

MS_APS_INDI_EX

HP_LOM

168. Which of the following statements about cross-connect board 1+1 protection are correct? (Multiple choice)

The source service board sends services to the active and standby cross-connect boards

After the service cross-connection is completed, the active and standby cross-connect boards send the data of the active cross-connect board to the receiving service board.

The receiving service board can only receive data from the active cross-connect board.

The buses of the two cross-connect modules work independently without interfering with each other.

A dual-bus system architecture indicates that the service board performs dual data feeds to the cross-connect side and selectively receives data on the cross-connect side.

Both cross-connect boards have the same configuration. The service board will selectively receive service from one of the

169. OTUk_DEG indicates that the OTUk signal is degraded. Which option is correct for the following description of the error detection mode? (Multiple choice)

When the bit error detection mode is burst mode, this alarm is reported when the signal is degraded or the bit error exceeds the limit

When the bit error detection mode is Poisson mode, this alarm is reported when the signal is degraded or the bit error exceeds the limit

When the bit error detection mode is burst mode, this alarm is reported when the signal is degraded

When the bit error detection mode is Poisson mode, this alarm will be reported when the signal is degraded

170. The scope of management of OMSn is the path from the input optical port on the multiplexer unit at the sending site to the output optical port on the demultiplexer unit at the receiving site. It is called the optical multiplex section (OMS) path.

True

False

Page 18 of 31

171. During equipment installation, the Optix OSN 9800 U32 standard subrack cannot be installed in which of the following cabinets?

A66B

N63B

N66B

N63E

172. Which of the following description about using the synchronous method to create fibers is wrong?

There is no need to create an optical fiber that exists on both the NMS side and the NE side, and whose information is completely consistent.

If there are fibers that have not been created on the U2000 or NEs, they need to be synchronized or created.

The existence of conflicting fibers does not affect the configuration of the path, so it can be ignored

Conflicting fiber refers to the fiber configured on the network element side and the configured fiber on the network management side.

173. After the U2000 delivers configuration data to the NE, if the verification of the SCC board fails, the NE enters the installation state.

True

False

174. Which of the following statements about the delay test is wrong?

The delay is divided into the delay of the store-and-forward device and the delay of the bit-forward device. Huawei devices are all store-and-forward devices

The timing starts from the entry of the first bit of the data frame, and ends when the first bit of the data frame appears on the output terminal

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

The timing starts from the entry of the first bit of the data frame, and ends when the first bit of the data frame appears on the output terminal

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

During the delay test, the frame rate can be greater than the throughput

175. Which of the following descriptions about circuit boards is wrong? (Multiple choice)

N401: 1 x 100 Gbit/s line service processing board

N210: 10 x 10 Gbit/s line service processing board

N502: 2-way 200G line service processing board (CFP)

N602: 2-way 400G line service processing board

176. Which of the following options are correct for ROADM node configuration? (Multiple choice)

WSM9+RDU9

WSD9+RMU9

WSMD9+WSMD9

WSM9+WSD9

177. Which of the following are other complex network structures derived from ring networking? (Multiple choice)

Tangent ring

Intersecting rings

Loop chain

Phase separation ring

178. The difference between MPLS-TP OAM and MPLS OAM does not include which of the following?

Added functions such as CCAISLBLT

Different message formats

OA message transmission cycle changes, canceled 3.3ms, 10ms

You can save some alarms in the label, such as TSWDTVDIEXPIEG

179. OOS overhead is non-associated overhead. Which of the following descriptions about OOS overhead is wrong?

Use the 21st-23rd time slot in the optical supervisory channel (OSC) signal frame structure to transfer overhead

OOS overhead occupies 2Mbit/s bandwidth

OOS overhead is not enabled by default

OOS overhead includes OTS, OMS/OCh overhead

180. Which of the following statements about the U2000 license is wrong?

Each license file corresponds to the equipment serial number (ESN) of a 2000 computer, so it can only be used on the corresponding computer

Official U2000 licenses vary by operating system platform. You must apply for a U2000 license based on a specific operating system

The U2000 license file is named in "OXdat format

Do not modify the license file, otherwise the license file will fail

Page 19 of 31

181. Since different frequency (or wavelength) components of the light source have different group velocities, in the transmission process, the time delay of different frequency beams is different and the dispersion is called ()

182. Configuring ROADM sites will enable multi-dimensional wavelength-level service scheduling without manual fiber jumping.

True

False

183. When the fiber between node and node B is open, the RU on the node detects the OTS_LOS alarm and inserts the OTS_BDI alarm into the node A. The RU on the node A reports the OTS_BDI alarm. The line board on the downstream node C reports the OCh_SSF alarm.

True

False

184. Which options are wrong in the following description about the ROADM board? (Multiple choice)

WSD9 realizes the dynamic and configurable multiplexing function from any wavelength to any port

WSM9 realizes the dynamically configurable demultiplexing function from any wavelength to any port

RMU9 implements the wave adding function of 9 channels of signals. Its upwave port can cooperate with the OTU single board with wavelength adjustable function to realize full dynamic input of 9 signals

The broadcast function of the RDU9 attack service signal in 9 directions

185. The Ethernet board has an external port (Port) and an internal port (VCTRUNK). The external port can set the Tag attribute, and the internal port cannot set the Tag attribute.

True

False

186. Which of the following TU-AIS alarms are often encountered during network maintenance can trigger TU-AIS alarms? (Multiple choice)

AU-LOP

R-LOS

HP-TIM

82-EXC

187. Which of the following working modes does the AT8 board support? (Multiple choice)

Reverse 2E2M

2E2M

1E1M

Reverse 1E1M

188. Which of the following descriptions about the technical characteristics of OTN is correct? (Multiple choice)

Large capacity transfer

Abundant expenses

Multi-service access

Flexible networking

189. The FAN board of the OptiXtrans E6616/OptiX OSN 1800 V Pro device has four independent fans. When any fan fails, the system can operate normally for 96 hours at an ambient temperature of -5 ° C to 40 ° C .

True

False

190. Which of the following is the networking method of parallel FOADW stations?

EX40 +EX40

EMR8+EMR8

MR4+MR4

EX40+EMR8

Page 20 of 31

191. The instruments commonly used in the daily maintenance and troubleshooting of MSTP equipment are? (Multiple choice)

Optical power meter

Bit Error Tester

Multimeter

Fixed light attenuation

192. Line boards selectively receive service in case of SNCP. So SNCP can protect the service on the line.

True

False

193. The decrease of signal-to-noise ratio at the receiving end will not cause bit errors.

True

False

194. Only one TCM can be used at the same site

True

False

195. Which of the following alarms did the peer report when a bit error was detected in the B2 byte?

MS-AIS

RS-BBE

MS-FEBBE

MS-BBE

196. The DWDM system has extremely high requirements on the stability of the light source. Which of the following factors affect the stability of the light source? (Multiple choice)

Temperature

Drive current

Encapsulation d. Humidity

197. What are the main functions of LAG? (Multiple choice)

Increase link capacity

Improve link availability

Detection and notification of service access points and intermediate transport network failures

198. Regarding the reporting of the OTUk_BDI alarm, which of the following statements is wrong?

Only the port on the WDM side will report oTUk_BDI

The downstream station receives the OTUk_AIS corresponding to the OTU board

The downstream station corresponding to the OTU board receives the OTUk_TIM

The downstream station receives the OTUk_SSF corresponding to the OTU board

199. When using the path method to create a Client path, if there is an RLOS alarm on the line board, the path cannot be created.

True

False

200. The TOA board is an 8-way arbitrary rate service tributary processing board. Which of the following description about the TOA (STND) board is wrong?

The maximum crossover capacity of a TOA board is 20 Gbit/s

When the service on the client side is GE, the working mode of the port is ODU0 non-aggregation mode, and the intra-board crossover needs to be configured.

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

When the service on the client side is FE, the working mode of the port is ODU1 aggregation mode, and the intra-board crossover needs to be configured.

Page 21 of 31

201. Which of the following options are faults of business configuration? (Multiple choice)

OTU/tributary board client-side attribute sending and receiving configurations are inconsistent

Inconsistent FEC/AFEC transceiver configurations

Optical cross-connect configuration error

Logical fiber connection error

202. Corresponds to the ISO seven-layer model. Ethernet corresponds to the physical layer and network layer of the seven-layer model, and the specifications defined by Ethernet include the MAC sublayer and the physical layer of the data link layer.

True

False

203. Which of the following descriptions about the OTU board is correct? (Multiple choice)

The single board in standard mode is easy to operate and can reduce maintenance costs.

For a single board in standard mode, on the network management, only the service mapping path under the channel or physical port is displayed, and all ODU layers are directly displayed under the physical port.

Standard mode has fewer path hierarchies than compatibility mode.

For a single board in compatibility mode, when configuring a cross-connect, the user does not need to care about the logical ports inside the board.

204. Flex grid technology can flexibly adjust the center frequency of the liquid length by adjusting the occupied slice position.

True

False

205. Which of the following descriptions about the system architecture of 0ptiXtrans E6600/OptiX OSN 1800 is correct?

Both E6616 and 1800 V Pro adopt L0+L1+L2 three-layer architecture.

E6608T/E6608/E6616 or 1800 II TP/1800 II Pro/1800 V Pro adopt L0+L1+L2 three-layer structure.

E6608T/E6616 or 1800 II TP/1800v Pro adopt L0+L1+L2 three-layer structure.

E6608T/E6608 or 1800 II TP/1800 II Pro adopt L0+L1+L2 three-layer structure.

206. For a multipoint-to-point topology, which of the following needs to be set to the TIN detection mode on the network management?

Path end sink compares DAPI only

Path Terminal Comparison SAPI&DAPI

Trail terminal sink only compares SAPI

207. Which of the following descriptions about the MPLS architecture is correct? (Multiple choice)

The control plane is connection-oriented and is responsible for label allocation, establishment of label forwarding tables, establishment and removal of label switching paths, etc.

MPLS uses short and fixed-length labels to encapsulate packet messages, and realizes fast forwarding on the forwarding plane

The forwarding plane is also called the data plane. It is connectionless-oriented and adds and deletes labels to packets. At the same time, the received packet data is forwarded according to the label forwarding table

The main application of MPLS technology is to build a tunnel to carry various types of services (such as TDW, Ethernet) transmitted by PWE3, and realize end-to-end transmission of services in the packet network

208. A VC-4 can transmit () VC-12, that is () 2.048 Mbit/s signals.

209. Which of the following descriptions about the Directioned scene is correct? (Multiple choice)

The wavelength carrying local traffic can be transmitted in a fixed direction.

If the current path needs to be adjusted, it is necessary to enter the station to adjust the fiber connection of the network.

Directioned scenarios are applied to non-ASON networks

When the service needs to be adjusted, or when the working path fails and the protection path is used, the optical cross-connect can be manually configured to realize flexible scheduling of services.

210. Milliwatts (m) and () (dBm) are two commonly used optical power units, the former is linear, and the latter is nonlinear.

Page 22 of 31

211. Which of the following scenarios is the instrument test method applicable to? (Multiple choice)

Locate the faulty board

Device docking problem

Troubleshoot transmission equipment external problems

Problems with equipment performance indicators

212. For a point-to-point network, set the TIM mode on the network management system to path terminal sink "only compare DAPI".

True

False

213. Pointer adjustment is related to which of the following?

The clock

Speed

Expenses

Scrambling

214. Which of the following are the basic principles of WDM system fault location? (Multiple choice)

Two-way first, then one-way

High level first, then low level

First single wave, then multiple waves

Locate external first, then transmit

215. Which of the following descriptions about the commissioning of the hybrid transmission system of 100G and 10G is wrong?

100G is a coherent system, and 10G is a non-coherent system. Mixed transmission needs to set an isolation zone

To expand the 100G channel capacity of the 10G system on the existing network, the dispersion compensation type needs to be adjusted

In the scenario of non-coherent live network expansion and 100G coherent mixed transmission, the OSNR tolerance of 100G wavelength and the non-electric relay transmission distance can be improved by reducing the optical power of the input fiber

Pay attention to the mixed transmission spectrum, the spectrum of the 10G signal is relatively wide, and it looks lower than the 10G signal in the spectrum, but the actual optical power is equivalent

216. In the Colorless scenario, use the M40V/D40 board for adding and adding waves.

True

False

217. When R_LOS, RLOF, R_OOF, MUT_LOS and other alarms appear on the device, it means that the service has been interrupted.

True

False

218. The two PIU/APIU boards of the OSN 1800 equipment use hot backup to supply power to the system. When one PIU/APIU board fails, the system can still work normally.

True

False

219. Which of the following time periods is the information of the 2M signal loaded into the multiframe?

500us

125us

500ms

125ms

220. In which ITU-T recommendation is the OTN frame structure defined?

AG975

BG652

CG694

DG709

Page 23 of 31

221. What items does the network reference model of PWE3 include? (Multiple choice)

Tunnel

222. Which of the following descriptions about oTN optical layer interfaces OTM-nm and OTM-nr.m is wrong?

m represents the speed, which can only take the value of 1, 2, 3

OTM-nr.m plus osC signal becomes OTM-nm

r indicates that the 0T call has removed some functions, here it means that the 0c function has been removed

n represents the number of waves carried at the highest capacity

223. For WDM networks, which of the following descriptions are correct?

For 10G and 100G mixed transmission networks, you can judge whether the dispersion compensation is consistent with the design based on the performance of 100G

For the OAU board, you can roughly judge the type of DCM module connected to the site according to the upper threshold of the nominal gain on the network management system - the upper threshold of the actual gain

For the OAU board, you can roughly judge the type of DCM module connected to the site according to the difference between the output of PAOUTI and the input of BAIN

For 10G and 100G mixed transmission networks, you can judge whether the dispersion compensation is consistent with the design according to the performance of 10G

224. Erbium-doped fiber amplifier (EDFA) is a key component of a new generation of optical communication systems. Which of the following is the function of EDFA? (Multiple choice)

High gain

High output power

Amplification at any wavelength

Low Noise Index

225. Which of the following boards contains VOA modules? (Multiple choice)

WSD9

RDU9

DWSS20

WSMD9

WSM9

226. The ECC protocol uses the network element ID as the unique identification of the network element. When NCE identifies different network elements in the interface and database, it also uses the network element ID as the keyword for retrieval.

True

False

227. The refractive index n1 of the fiber core () the cladding refractive index n2, which is a necessary condition for the transmission of optical signals in the optical fiber?

is greater than

is less than

is less than or equal to

is equal to

228. The OTN electrical layer SM, PM, and TCMi overheads all contain a 1-byte BIP8 field: they monitor different frame structures.

True

False

229. OSN 3500 branch service has strong up and down capabilities: there are 16 branch outlet slots, 504 2M, 32 E4, 117 E3/DS3, and 132 STW-1e to provide STM-1/4/16/ 64 group rate

True

False

230. When the optical cable is laid by traction, the main traction force should be added to ( ) of the optical cable

Page 24 of 31

231. Which of the following description about 1+1 optical line protection is wrong?

The switching mode defaults to non-restorative

The switching mode defaults to double-ended switching

The default value of the initial difference between the main and standby input light is 0

The default of the main and standby input optical difference gate is 5dB

232. There are three multi-level connection monitoring modes (TCM) of OTN, which ones are correct? (Multiple choice)

Layer mode

Overlap mode

Nested patterns

Through mode

233. The maximum output optical power of an OBU of an optical amplifier is 20dBm, how many dBm should the standard output optical power of the single-wavelength system be used in the C-band 80 be?

+4dBm

+7dBm

-2dBm

+1dBm

234. What are the differences between the AU pointer and the TU pointer? (Multiple choice)

The scope of the instruction is different

The number of bits occupied by the pointer value is different

The bytes stored in the pointer value are different

The unit of adjustment is different

235. Which of the following descriptions about the function of the electrical layer overhead processing source are correct? (Multiple choice)

OPUk performs client signal mapping, frequency adjustment and rate adaptation in the sending direction.

ODUkP is responsible for calculating BIP-8, writing PM, GCC1/2 and other overheads.

ODUkT calculates BIP-8 and writes it to TCMi.

OTUk is responsible for calculating BIP-8 and writing into SM, GCC0, FAS, MAFS, etc.

236. The calculation of BIP-8 belongs to one of the source functions of the OTUk layer.

True

False

237. Which of the following descriptions about the business package method is wrong?

At present, the boards that support service package configuration include TOA, TOX, TISC and other tributary boards.

The business package implements one-click distribution of typical business configurations. In fact, a series of configuration commands are issued for batch configuration, which reduces the difficulty of product deployment and maintenance costs.

The service package method can configure the working mode, service type, cross-connect and port type in batches

There are two different ways to configure business packages, one is through batch board configuration, and the other is to configure each board separately

238. When configuring 1+1 optical line protection, you can choose RI1/T01 or RI2/T02 as the working channel according to the actual situation.

True

False

239. Which of the following description of the 100G mixed transmission system is wrong?

Coherent and non-coherent signals (10G and 40G ODB will affect each other, resulting in a sharp drop in performance, and isolation bands are necessary)

40G DQPSK and coherent signals will not affect each other without isolation band

10G starts from a short wavelength, and the isolation band can be filled with 40G DQPSK wavelength

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

240. The rigid pipes that MS-OTN equipment can provide include? (Multiple choice)

LSP

Wavelength

ODUk

Page 25 of 31

241. Which of the following options are included in the advantages of WDM? (Multiple choice)

The system is easy to upgrade, and the existing investment can be protected to the greatest extent during the upgrade

Can fully replace SDH equipment

Compatible with future all-optical switching networks

Large capacity, "transparent" transmission of data

242. Which of the following description about QPSK modulation technology is wrong? (Multiple choice)

The essence of QPSX is to reduce the baud rate of the optical signal by half without reducing the line rate by selecting two possible values for the phase of the optical field.

EPDM-QPSK is the best solution for 100G WDM transmission.

QPSK modulation can increase the spectral bandwidth, reduce the OSNR requirements of the system and the damage of fiber nonlinearity, and improve the dispersion tolerance and PMD tolerance.

Through QPSK, one phase represents 2 digital bits, which is equivalent to the processing of "1 is divided into 2" for the data, and the rate is reduced by half.

243. According to the recommendation of ITUT, the requirement that the MSP switching time should be within 50ms is conditional. For example, the number of network elements on the entire ring network is less than 16.

True

False

244. Which of the following layer overheads belongs to the electrical layer overhead of OTN? (Multiple choice)

OOS

FAS

GCCO

245. Which of the following descriptions about the board configuration requirements in the OTN network is correct? (Multiple choice)

The logo on the panel handle should be correct and clear

There are no defects such as insertion marks, holes, and damage at the female end of the board connector

All boards should be inserted to the bottom and the board handles should be fastened properly

The mounting screws on the board must be screwed in place

246. Which of the following statements about the MPLS-TP OAM level is correct?

Section is the service layer of Tunnel, Tunnel is the service layer of PW, and PW is the service layer of Service

Section is the service layer of PW, PW is the service layer of Tunnel, and Tunnel is the service layer of Service

Service is the service layer of PW, PW is the service layer of Tunnel, and Tunnel is the service layer of Section

Tunnel is the service layer of PW, PW is the service layer of Service, and Service is the service layer of Section

247. In a troubleshooting scenario, maintenance personnel are generally required to collect and save on-site evidence before troubleshooting. Which of the following descriptions about collecting and saving on-site evidence is correct?

Periodic data collection is only required when the equipment is in normal operation

Periodic data collection during normal equipment operation is not necessary

Periodic collection when the equipment is in normal operation and collection when the equipment fails

Only need data collection when equipment failure

248. Which of the following is the performance related to SM segment error?

OTUk_BBE

OTUk_SM_FEBBE

OTUk_SM_FEES

OTUk_PM_BBE

249. Which of the following functions are mainly performed in the sink function processing of the electrical layer overhead? (Multiple choice)

Realize the suppression of alarms and the reporting of performance events

Back-insert or down-insert signal

Reporting of defect information

Overhead Monitoring at the Receiver

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

Transmission distance

Dispersion coefficient

Emission wavelength

Receiving wavelength

Page 26 of 31

251. Under normal circumstances, which of the following operations will definitely cause service interruption on the live network? (Multiple choice)

Software Loopback

Hardware Loopback

Soft reset service board

Hard reset service board

252. 1+1 optical line protection single-end switching is faster than 1+1 optical line protection double-end switching.

True

False

253. In a typical chain-type NG WDM network (such as A→B→C, A, B, and C are three stations), it is found that the service phone between station A and station C is not connected during commissioning. What are the possible reasons? (Multiple choice)

The SC2 board at station B is damaged

In the configuration of the SC2 single board of station B, the configuration was changed to "no business through the optical port" by mistake.

The OA board in the receiving direction of station C is damaged

254. Which of the following descriptions about 64K service configuration and SDH cross-connect configuration is wrong?

SDH services support one-way and two-way services

The VC12 time slot range of the PCM board starts from 65

64K services support one-way and two-way services

PCM single board supports VC3 level service crossover

255. The OLA device is used in an optical amplification station; it amplifies the optical signals transmitted in two directions respectively. Which boards are required for OLA sites? (Multiple choice)

OAU1

SCC

SFIU

ST2

256. When the 2M PDH signal is mapped into VC12, the mapping method used is ().

257. DWSS20 single board can realize 20-dimensional optical signal scheduling

True

False

258. Which of the following operations may interrupt network element services? (Multiple choice)

Search protection subnets

Find trails

Disable trails

Download network element data

259. The U2000 can be flexibly interconnected with different third-party NMSs through the northbound interface (NBl) and provide physical inventory and alarm information for the upper-layer NMS.

True

False

260. Which of the following descriptions about the advantages of WDM is wrong?

Networking flexibility, economy and reliability

Abundant expenses

Ultra-large capacity, ultra-long-distance transmission

"Transparent" transmission of data

Page 27 of 31

261. OSN 7500 supports a maximum of 2M service boards. Which of the following is correct?

262. In the fault handling scenario, which of the following descriptions about the common methods of fault location is wrong?

Replacement method requires spare parts

The signal flow analysis method has high requirements for maintenance personnel

The instrument test method requires instruments

The loopback method does not affect the business

263. For OSN series equipment, when the standby board is normal, which of the following operations will not cause the active/standby switchover of the crossover or clock board?

Hard Reset Crossover or Clock Motherboard

Logically delete the main cross and clock board

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

Issue the active/standby switchover command

264. For nonlinear effect FWM, which of the following processing methods is correct?

Control the input optical power

Controlling Optical Power at Individual Wavelengths

Do not use G, 653 fiber in DWDM system

Using a fiber with a large effective area

265. When ODUk SNCP protection is configured, ordinary WDM services can be converted to SNCP services, but SNCP services cannot be converted to ordinary WDM services.

True

False

266. Which of the following alarms can trigger the automatic switching of optical line protection? (Multiple choice)

POWER_DIFF_OVER

R_LOS

MUT_LOS

IN_PWR_LOW

267. The four elements of the WDM network are () dispersion, () and nonlinear effects.

268. Which of the following options is the low-loss area of single-mode fiber? (Multiple choice)

1310nm

900nm

1550nm

1200nm

269. The IP address of the interconnection interface generally uses a 30-bit mask. Which of the following IP addresses can be configured at both ends of the link?

100.1.2.64 and 100.1.2.65

190.136.3.14 and 190.136.3.15

192.168.5.33 Lot 192.168.5.34

171.168.1.4 and 171.168.1.5

270. The AM port of the TM20 board can input the combined signal

True

False

Page 28 of 31

271. Which of the following methods to avoid discrete paths is correct? (Multiple choice)

Fiber cut or switchover tests should be performed on paths with protection routes to ensure complete and standardized configurations.

Try to use the path function for configuration.

Guide users to learn business configuration specifications.

For services configured on a single station, path search must be performed on the network management system to ensure complete and standardized service configurations.

272. MPLS is not a service or application. It is actually a tunneling technology.

True

False

273. Direct modulation is also called EA modulation. It does not directly modulate the light source, but adds a modulator to the output path of the light source to modulate the light wave. The modulator actually acts as a switch.

True

False

274. For OSN6800 equipment, which of the following slots does not have an electrical layer crossover backplane bus?

Slot1

Slot9

Slot10

Slot17

275. Which of the following protections in microwave equipment does not require dual slots?

HSB

SD+FD

276. Which of the following statements about MSP rings are true? (Multiple choice)

The number of nodes on the MSP ring cannot exceed 16

Select only SDH NEs when creating a protection subnet. Do not select REG or WOM network elements

"Resource sharing" must be selected when multiple protection subnets occupy the same port on the same board

Allocation by VC4 means that different VC4s are allocated to different protection subnets to implement MSP2Q only in certain channels

277. In a chain network, NE1, NE2, and NE3 are all OADM sites, and NE1 is a gateway network element, and uses OSC communication. When the optical monitoring board at the intermediate site NE2 fails, which of the following phenomena will not occur?

The optical monitoring signal between NE1 and NE3 is interrupted

The monitoring board in NE2 reports the BD_STAIUS alarm

The OSC_LOS alarm is reported on the monitoring boards in NE1 and NE3

Service interruption between NE1 and NE3

278. The standard Ethernet frame length should not be less than 64 bytes.

Which of the following factors cause this limitation? (Multiple choice)

Minimum transmission distance

Maximum transmission distance

Working Mechanism of Conflict Detection

MAC address

279. The special fiber input power (high power) is higher than the main fiber input power. The main purpose is to improve what factor?

Dispersion

OSNR c. power

Nonlinear

280. In unstructured emulation mode (SAToP), WS-OTN equipment provides the function of compressing idle 64 Kbit/s time slots in E1 signals to save transmission bandwidth.

True

False

Page 29 of 31

281. In any scenario, hard reset of the main control board will cause service interruption.

True

False

282. An OTN network uses WSMD4 to form ROADM network elements. After the logical fiber is created, the paths that can be directly searched are: (Multiple choice)

OTS

OCh

OMS

Client

283. After configuring the PDH service on a per network element basis. The complete trace cannot be searched.

Which of the following is a possible cause? (Multiple choice)

Wrong choice of branch plate

Wrong board selection

The time period configuration is wrong

Passthrough is not configured at the intermediate site

284. Which of the following ways to synchronize alarms?

Timing synchronization

Automatic synchronization

Manual synchronization

285. After enabling TCM monitoring, when the upstream station detects a LOF alarm, it will plug in the IAE local end and report the ODU1_TCMn_IAES performance event.

True

False

286. SES: 5% or more errored blocks or at least one defect in one second (OCI/AIS/LCKYAE/LTC/TIM/PLM).

True

False

287. Which of the following boards can realize the broadcast function of service signals in the receiving direction? (Multiple choice)

DWSS20

WSMD9

TD20

WSD9

288. When the ACT indicator of the SDH board is off, it means that the board has a hardware failure and cannot be used.

True

False

289. Which of the following parts does the general encapsulation format of PWE3 consist of? (Multiple choice)

MPLS labels

Type

Control byte CW

PLA LOAD

290. Which of the following local maintenance terminals can be used to manage MSTP devices?

U2000 LCT

U2000 Web LCT

U2000 IP LCT

All of the above

Page 30 of 31

291. Which of the following statements are correct? (Multiple choice)

Hub can be used to build a local area network

Generally, the Hub has a routing function

All PCs under a shared Ethernet Hub belong to the same midrange domain

Hub is usually also called a hub and can generally be used as an address translation device

292. Which of the following descriptions about the PWE3 network reference model is wrong?

PE is located at the edge of the operator's network and is a device that provides PWE3 to CE

CE cannot perceive whether the simulated service or the local service is being used

PES establishes a point-to-point channel, the channels are isolated from each other, and the user=layer messages are transparently transmitted between them.

Tunnel is a mechanism for transparently carrying information on the network. It is used to carry P7. A tunnel can only support one PW

293. Which of the following maintenance signals is not a proactive OAM?

RDI

AIS

294. For coherent system commissioning, according to the optical power of each wavelength monitored by the OPM8 single board or the spectrum analyzer, to what range should the optical power difference of each wavelength be adjusted at the equalization station?

Soil 2dB

soil 1dB

Soil 3dB

±4 dB

295. Which of the following descriptions about electrical layer scheduling is wrong?

Inter-board cross-connect refers to the cross-connect configured between different boards. Inter-board cross-connection dispatches ODUk services between boards in a subrack through the backplane and centralized cross-connection boards.

Intra-board cross-connect refers to the cross-connect configured between different ports on the same board.

TTA and TDC boards support aggregation mode and non-aggregation mode.

In the aggregation mode application scenario, it is necessary to cross within the board first, and then cross between boards.

All cross-connects need to be configured on the network management system.

296. For a system without an optical amplifier, the lower threshold of the received optical power of the wavelength division side of the OTU board and the line board is the receiving sensitivity of the optical module + 3 dB.

True

False

297. When 172.17.15.0/24 uses 4 extra bits for subnetting, which of the following addresses are legal subnet addresses? (Multiple choice)

172.17.15.0

172.17.15.8

172.17.15.40

172.17.15.96

172.17.15.248

298. Which of the following is not included in the general encapsulation format of PWE3?

FCS

Control word CW

MPLS label

Payload

299. Use a spectrum analyzer to test the spectrum of the output signal of the "MON" port of the single board. What information can be read from the instrument? (Multiple choice)

Optical power

Color glue

Signal-to-noise ratio

Center wavelength

300. The length range of the DATA field in the Ethernet frame structure is?

46-1500 bytes

46-1518 bytes

Sections 64-1518

64-1500 bytes

Page 31 of 31

301. Which of the following are not part of the ASON control protocol?

LMP

RSVP-TE

IS-IS

OSPF-TE

302. Which of the following platforms can be deployed for a (local) HA solution where the active and standby servers are deployed at the same location? (Multiple choice)

Windows

Solaris

SUSE Linux

All of the above

303. Which of the following alarm/event dump modes does U2000 support? (Multiple choice)

Manual dumping

Automatic dumping

Spill and dump

Periodically dump the alarm log

304. In terms of protection capability, which of the following topological structures has the strongest protection capability?

Linear topology

Star topology

Tree topology

Ring topology

Mesh topology

305. Which of the following IP addresses is not a private network IP address?

172.255.0.1

10.0.0.1

10.255.0.1

192.168.0.1

306. The collection and storage of on-site data includes regular collection when the equipment is in normal operation and collection when the equipment fails the network. Generally, before troubleshooting, maintenance personnel must first collect and save on-site data.

True

False

307. The LAG types supported by MS-OIN equipment include () and ().

308. When using the path method to create OCh, which of the following service layer paths is required?

ODUk

OMS

OTS

Client

309. The main difference between an open DWDM system and an integrated DWDM system is whether one of the following technologies is used?

Wavelength conversion technology

Optical monitoring technology

Optical amplification technology

Multiplexing and demultiplexing technology

310. Which of the following residual dispersion values are within the dispersion tolerance of the TN52ND2 board? (Multiple choice)

700ps/nm

600ps/nm

900ps/nm

500ps/nm

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