Huawei HCIE-Transmission H12-931-ENU Mock Questions and Answers

Jonnie Karnath2023-07-31T08:34:27+00:00

The Huawei HCIE-Transmission H12-931-ENU certification exam is designed to test an individual’s knowledge and skills in the field of transmission network design and optimization. For those preparing to take the exam, Certspots offers a set of HCIE-Transmission H12-931-ENU mock questions and answers to help you practice and prepare. These HCIE-Transmission H12-931-ENU mock questions are designed to simulate the actual exam, and can be accessed online through their website. They cover a range of topics and difficulty levels, providing a comprehensive review of the material you need to know to pass the HCIE-Transmission H12-931-ENU exam.

By practicing with these HCIE-Transmission H12-931-ENU mock questions and answers, you’ll be better equipped to tackle the actual exam, and have a better understanding of the areas where you need to focus your study efforts. So if you’re looking to earn your Huawei HCIE-Transmission certification, be sure to check out Certspots’ free mock questions and answers to help you prepare.

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1. After the WDM commissioning of the 10G system is completed, it is found that the OSNR value of the single board scanned by the MCA at the receiving end is good, but the bit error rate before correction is very poor. Which of the following are the possible reasons? (Multiple choice)

Unreasonable dispersion compensation

Unreasonable optical power commissioning

The optical balance is used in the middle

The line attenuation is greater than the design value

2. Regarding the interconnection of different circuit boards and single boards of OTN equipment, which of the following statements is correct? (Multiple choice)

TN12ND2 and TN12NS2 can be connected in AFEC mode

TN12ND2 and TN11ND2 can be connected in AFEC mode

TN12ND2 and TN52ND2 can be connected in AFEC mode

TN12ND2 and TN52/53/54/57NQ2 can be connected in AFEC mode

3. Which of the following operations may be a bit error due to nonlinear effects?

Replace the optical amplifier board at the transmit end with a Raman board, and the bit error of the OTU board is reduced

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

Reduce the output optical power of the sending end, and the bit error of the OTU board is reduced

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

4. As shown in the figure, the business configuration of the PP ring chain is incomplete or wrong, resulting in discrete services. In order to solve this discrete business, it is necessary to complete the business configuration. Which of the following steps are correct? (Multiple choice)

Create a two-way collusion service on the ADM2 site on the U2000

Create a one-way collusion service for the ADM2 site on the U2000

The ADM3 site is not configured with selective reception, and needs to be deleted and reconfigured

ADM3 is not configured for optional reception, and it is configured directly on U2000

5. Which of the following descriptions about the cross-connect board of the OSN 8800 T64 subrack is correct? (Multiple choice)

XCT+SXM can be used together to provide an ODUK crossover with a total capacity of 2.56T bit/s

XCT+SXM can support ODUO, 1, 2, 3 levels of crossover

The enhanced subrack can only be configured with UXCT+USXM or UXCT+USXH

XCT+SXM can be regarded as a whole when working, if any one board fails, the two boards will be switched together

6. E1 has three ways of framing, multi-framing and non-framing. The main difference is that the time slots for effective data transmission are different.

TRUE

FALSE

7. When configuring ODUk SNCP protection, ordinary WDM services can be converted to SNCP services, but SNCP services cannot be converted to ordinary WDM services.

TRUE

FALSE

8. The rate represented by STM-1 is ().

9. WDM system mainly adopts DCM compensation method for chromatic dispersion compensation. Which of the following statements about DCM dispersion compensation is wrong?

The DCM module is more likely to cause nonlinearity than the line transmission fiber, so the optical power entering the fiber must be strictly controlled.

For a 10G system with a line fiber length within 400km,

652DCM can be used to compensate for

655 (LEAF)

Improper DCM configuration will lead to degradation of receiving end performance

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

10. When deploying QoS, which part of the network is usually deployed for complex classification of data flows?

Edge access layer

Aggregation layer

Core layer

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11. In the network management planning process, which item is not absolutely necessary?

Network scale planning, network management deployment planning

DON network planning, OSS docking planning

Network parameter planning and reliability planning of the network management server

Network management software/hardware configuration

12. Optical wavelength sharing protection OWSP is used to configure the ring network of distributed services, and realize the protection of one route of distributed services between all sites by occupying two different wavelengths.

TRUE

FALSE

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

Which of the following options is not a feature of the optimization function?

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

Service routing cannot be constrained during the optimization process

Operations such as rerouting, downgrading, and deletion cannot be performed while optimizing

Cannot be optimized when creating, rerouting, downgrading, restarting, restoring, or deleting

14. An operator needs to configure 60 clients, 200 OptiX PTN 1900, 100 OptiX OSN 3800 (With ASON), 150 NE40E, 200 CX600 series devices, FTTx OLT and MDU on the access side, a total of 80,000 Line xDSL, 70,000 lines PSTN ports, deployed 30 OLTs, 300 MDU devices.

Regarding the description of this network, which of the following is error?

The network management center needs to manage 980 physical network elements

The number of network elements equivalent to 100 OptiX OSN 3800 (With ASON) is 350

In practice, it is necessary to reserve expansion capacity according to 50% of the current network scale

The network is a medium-scale network

15. Regarding system security planning and reliability planning, which of the following is correct? (Multiple choice)

Based on security considerations, the communication bandwidth of medium-scale remote dual-machine hot backup is recommended to be 2

Operational safety and reliability design includes: authority control, ACL control, time control, login times limit, user monitoring and operation confirmation.

The security management of the network management mainly includes object management, password management, access control management, and rights and domain management.

In the process of data output, in order to ensure the security of data transmission, U2000 needs to support data encryption protocol, among which SSLv3 protocol can be used for data transmission encryption between U2000 and network element equipment, and can also be used between U2000 and upper-layer OSS system encrypted data transmission.

16. NSF (Non-Stop Forwarding) refers to the normal execution of data forwarding when a certain type of failure occurs in the device to protect the key business functions on the network. Which of the following scenarios does 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

Soft reset of the XCS board (the XCS board has no protection)

17. When the OTN device is interconnected with the Cisco device, the CRC error packet volume of the Cisco device interface is relatively large. Which of the following is reason for the impossibility?

The optical power of interconnection is abnormal

Large bit errors on the line side of OTN equipment

The wrong type of connected optical module

Interconnected optical module failure

18. Which of the following descriptions about the delay of store-and-forward devices is wrong?

The last bit of the data frame enters the device to start timing

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

The first bit of the data frame enters the device to start timing

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

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

If the RMU is used locally to add waves and has an optical amplifier, the OSNR value of the wavelength detected by the SOM in the pass-through direction will deviate from the actual value

There is an optical amplifier locally but no filter. 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 crossover at this site must be in the same network element

20. Which of the following types of services that can be carried by PWE3 technology? (Multiple choice)

CES

E-Line

E-LAN

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21. When the LSX client RX1/TX1 has no STM-64 signal access, which of the following alarms are reported by the WDM system? (Multiple choice)

R_LOC

R_LOS

REM_SF

R_LOF

22. 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

23. The input of external clock timing signal can adopt the form of 2048 KHz and 2048 Kbit/s. If it is in 2048Kbit/s mode, the device can automatically extract clock quality information; if it is in 2048KHZ mode, it cannot extract clock quality information and needs to be manually defined.

TRUE

FALSE

24. In the Linux system, configure an IP address 129.9.1.100 for the network card Eth0, and use which of the following command?

ifconfig eth0 129.9.1.100

ipconfig 129.9.1.100

ipconfig eth0 129.9.1.100

ifconfig 129.9.1.100

25. When a working PQ1 fails, the device performs TPS protection switching. Regarding the statement about the switching process, which ones are correct? (Multiple choice)

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

The protection PQ1 receives and processes the services transferred from the D75S to the protection bus, and completes the protection switching.

D75S responds to the switching signal, transfers the service to the shared protection bus, and turns off the service sent to the corresponding PQ1.

If the protection PQ1 works normally, the cross-connect board sends a switching signal to the D75S corresponding to the faulty PQ1 through the switching control bus.

26. Regarding the wavelength isolation band during 10G/100G mixed transmission, which of the following statements is wrong?

Coherent signals start from long wavelengths, 10G starts from short wavelengths, and an isolation zone must be left in the middle

The isolation band can be filled with 40G DQPSK wavelength or 40G ODB wavelength

In order to avoid rerouting into the isolation zone, the optical layer ASON prohibits 10G and coherent mixed optical layer ASON

The mixed transmission cost is related to the number of transmission spans, the width of the isolation band, and the FEC encoding method

27. Hybrid MSTP equipment supports cross-domain (packet domain, TDM domain) intercommunication. Which of the following descriptions is correct? (Multiple choice)

TDM services are carried by end-to-end SDH

Packet services are carried by end-to-end packet mode

TDN services are carried in end-to-end packet mode

Packet services are carried by end-to-end SDH

28. 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

29. During the network commissioning process, if it is found that the OSNR is not up to the standard, which of the following methods can be used to solve it? (Multiple choice)

Use a Raman amplifier to replace part of the EDFA amplifier

Replace low-performance FEC with high-performance FEC

Adding electrical relay sites

Debug optical amplifiers to ensure that all amplifiers work in the nominal state

30. Which statement 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 the outgoing and incoming directions, and traffic shaping can only be used in the outgoing direction

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

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31. Among the GSCC single boards, which of the following version is supported by the CF card?

N1GSCc

N4GSCC

N6GSCC

N3GSCC

32. OSN 8800 equipment enhances the relationship between the main and backup slots of the subrack PIU. Which of the following is the correct relationship between the main and backup slots? (Multiple choice)

69 and 89

69 and 78

78 and 81

79 and 80

70 and 88

70 and 79

33. Which of the following will be reported when the fiber is cut off on a common MSP ring? (Multiple choice)

TU-AIS

R-Los

APSJNDI

BD status

34. GR (Graceful Restart) is one of the key technologies to provide HA. GR can keep the entire system from interrupting services when a failover occurs, and can realize rapid network aggregation under normal conditions.

TRUE

FALSE

35. Which of the following is wrong about DCN network planning? (Multiple choice)

The network management server communicates with each managed NE using in-band networking or out-of-band networking. The in-band networking refers to the networking mode in which the U2000 uses the service channel provided by the managed device to manage the devices on the network.

Huawei's transport domain network elements support three communication protocols for DCN networking. Among them, the HWECC protocol is a proprietary communication protocol developed by Huawei for DCN networking of transport domain network elements.

The IP address of the U2000 is "129.9.0.100/24, and the IP address of the gateway NE it manages is 129.9.0.2/24. If NEs communicate through IP Over DCC, the U2000 must be directly connected to the gateway N

All Huawei transport domain NEs support the HWECC protocol, and the physical transmission channel defaults to D1~D12 bytes. When the network element ID is set, ECC communication can be performed without any configuration after plugging in the optical fiber.

36. In the U2000 dual-system hot standby system, the primary site fails and the backup site fails to start. Which of the following are the possible reasons? (Multiple choice)

Communication between master and backup is interrupted

Database exception

The standby site has volume exceptions

High disk space usage

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

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

TRUE

FALSE

39. If the U2000 network management finds that a network element reports an alarm of "the network element is in a safe state", the operations that are not allowed on the U2000 are?

Download data from the NMS to the problematic NE

Alarm Synchronization

Upload data from the network element side to the network management system

Data consistency check

40. In order to meet the specified synchronization quality requirements, corresponding requirements must be made on the network for synchronous transmission, and certain networking rules must be followed when planning the network. Which of the following is incorrect?

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

The number of switching office clocks cannot exceed 10

The total number of devices in one direction cannot exceed 60

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41. The GFP protocol has a high degree of standardization. It is a standard way for data services to be mapped to SDH/OTN. Which of the following characteristics of the GFP protocol is correct? (Multiple choice)

GFP currently supports frame-mapped (Frame-mapped) and transparent mapping (transparent)

Capable of statistical multiplexing of user data signals

It can more effectively prevent frame errors caused by bit errors, and is more conducive to the interconnection and intercommunication of various manufacturers

Support point-to-point or ring network service configuration

42. When the network bridge adopts the IVL learning mode, an entry of the MAC address table is established according to the source MAC address of the data frame and the source port of the data frame, and the entry is valid for all VLANs.

TRUE

FALSE

43. What are the main components of Huawei RTN 900 series equipment? (Multiple choice)

IDU

ODU

GPS

IF cable

Antenna

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

OSC_Los

R_LOS

The main control module fails

Contains data sets: one clock data set, N port data sets

45. During the acceptance test, the line power test reference point MPI-S refers to the output end of the transmitter amplifier.

TRUE

FALSE

46. In a Layer 2 switching device, if the Ethernet port is Access, the port can only receive Ethernet frames without Vlan or Ethernet frames with the same default Vlan ID as the port

TRUE

FALSE

47. When the Ethernet networking is applied, which of the following characteristics can adjust the bandwidth as needed, and dynamically increase or decrease the members in the VCTRUNK without affecting the business? When a member of the virtual concatenation group fails, the bandwidth can be quickly adjusted to ensure the normal transmission of data; when the failed member recovers, the original bandwidth of the virtual concatenation group is automatically restored.

LCAS

LAG

DLAG

QoS

48. A network is configured with SOM. When performing path performance analysis, the OSNR value of the downstream optical amplifier of 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 distribution, start the performance analysis immediately. If the SOM route is configured first on the later OMS segment, and the OSNR calculation is started first, and there is no basis for the OSNR calculation value of the previous segment, this phenomenon will occur.

The calculation of the OSNR value of the first part of the OMS segment where the OCH path is located is completed, and the calculation of the latter part has not been started. At this time, the performance analysis is started. Due to external reasons, the new calculation value of the former part is reduced, and this phenomenon will occur.

The network management must issue SOM routing configurations to the OMS segments on the path in sequence from front to back. It takes about a few seconds for each OMS segment to issue SOM routing configurations. There are time differences in configuring SOM routes between OMS segments.

On the "Path Performance Analysis" interface, click "Analyze" to restart the performance analysis, which can solve the problem

49. MAC forwarding table: How many of the following items are included? (Multiple choice)

AIP address

MAC address

A port number or set of port numbers

If the VLAN is divided on the switch, it also includes the VLAN ID

50. 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, and Linux does not need to

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

Manage hot-swappable devices through cfgadm in Solaris, and when the device is connected in Linux, the system automatically recognizes and configures hot-swappable devices

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

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51. It is known that the GE optical interface technical indicators 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): 9. For this optical interface, which of the following optical powers (dBm) is the most suitable received optical power?

-3

-15

-5

52. Which of the following descriptions about the client-side 1+1 protection features is wrong?

OTU client optical layer dual transmission and selective reception;

Protect the OTU single board and OCh optical fiber by occupying and protecting two wavelengths and using different routes for transmission;

The working and protection wavelengths must be the same;

Long application time and wide protection range

53. In the OSI reference model, the unit of physical layer data is (), and the unit of data link layer data is ()

54. The SC2 board belongs to the optical monitoring channel type single board, which is used to realize the sending and receiving control of the two-way optical monitoring signal in the east and west directions, transmit and extract the overhead information of the system, and send it to the SCC board after processing. The ST2 board has similar functions to the SC2 board. It can also implement IEEE 1588v2 synchronous clock processing and transparent transmission of two FE signals.

TRUE

FALSE

55. Which of the following does not belong to the three tricks of ASON business recovery?

Optimize to restore to other paths

Force reactivation to restore

Downgrade to traditional business reconstruction recovery

Download and restore the network element database

56. Regarding the network-level protection switching test of the OTN system, which of the following statements is wrong? (Multiple choice)

Since ODUk-SNCP does not involve switching protocols, it can assure customers that the test switching time must be less than 50ms

The power difference between the active and standby channels of the OLP protection group exceeds 3dB by default to report an alarm, and the maximum can be set to 8dB

The abnormal threshold of OLP master and backup optical power exceeds 5dB by default and performs switching. 2 Threshold range can be set -5-5

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

Use ODUk-SNCP protection superimposed on OLP protection. In order to avoid secondary switching of SNCP protection, you can set the delay time in the SNCP protection group

57. Regarding the operation of deleting paths from the network management system, which of the following statements is wrong?

Deleting trails from the network layer only deletes WDM trails at the network layer on the NMS side

There is no interruption of business after the path is removed from the network layer

Deleting a trail from the network element layer will delete the trails on the network element side and the network layer together

After the path is deleted from the network layer and the network element layer, the service will be interrupted

58. Now there is a chain network of three NEs, NE1-NE2-NE3, and a low-order 2M service from NE1 to NE2 is configured. All three NEs are configured with low-order cross-connects. What about the J byte of the corresponding channel of NE2? processing, which of the following is correct?

Overhead punch-through

Overhead detection

Expense reconciliation

Overhead termination

59. Which of the following features does the N3EFS4 board support? (Multiple choice)

LCAS

QINQ

LPT

QoS

60. When LOA/TOA/THA/TOM/TOG board services are enabled, the client-side interface of the local end reports an L_SYNC alarm. What is the cause?

Abnormal light reception on the local client-side interface and abnormal light reception on the remote client-side interface

The local client-side interface receives light normally, and the remote client-side interface receives abnormal light

The local client-side interface receives light normally, and the remote client-side interface receives light normally.

The local client-side interface receives abnormal light, and the remote client-side interface receives normal light.

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61. On the U2000 network management, the packet plane and TDM plane in the Hybrid MSTP device can be managed in a unified manner to realize end-to-end intercommunication of services.

TRUE

FALSE

62. The signal frequency allowed in the ITU-TG692 recommendation 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

63. The resources between the single-board optical cross-connect configuration and the single-site optical cross-connect configuration function are mutually exclusive, that is, after the user configures the single-board optical cross-connect of a certain wavelength on a WSS board, the single-site optical cross-connect cannot be used to configure the single-board optical cross-connect at this wavelength. business scheduling

TRUE

FALSE

64. The optical power of one wave is 3dBm, and the optical power of the other wave is 5dBm. The total optical power after combining the two waves is 3+5 = 8dBm

TRUE

FALSE

65. In the following analysis of the reasons why the optical layer path (OCH level) may cause routing calculation failure, which options are correct? (Multiple choice)

The fiber attenuation between the TDC and RDC ports of the OAU board is too large.

The wavelength of the port on the WDM side of the OTU board is inconsistent with the wavelength of the optical cross-connect

Fiber connection error

The network layer OTS path is missing

66. QOS refers to a capability of the network, that is, to provide the required services for specific services on the network across multiple underlying network technologies (MP, FR, ATM, Ethernet, SDH, MPLS, etc.), The expected level of service can be achieved in terms of packet rate, delay, jitter, and bandwidth. Which of the following is his goal? (Multiple choice)

Effective control over network resources and their use

Avoid and manage network congestion

Reduce the loss rate of packets

Regulate network traffic

Provide dedicated bandwidth for specific users or specific services

Support real-time business on the network

67. Which of the following statements about OTN overhead is correct? (Multiple choice)

The bit value of BDI in the SM/TCMi/PM overhead field (bit 5 of the third byte) of 5 consecutive frames is "1", which will generate BDI

BIP-8 bit errors in SM, PM, and TCM monitor bit errors in different areas of different layers in OTN

In the OTN frame structure, only SM overhead has IAE and BIAE functions

Both TCM and PM have ODUK-LCK, ODUK-OCI, ODUK-AIS three kinds of maintenance information

68. Regarding the commissioning requirements for NG WDM optical power, which of the following descriptions is correct? (Multiple choice)

Before commissioning, adjust the VOA star reduction of each channel of M40V/D40V to 5dB

For the OAU optical amplifier board, by setting the gain, ensure that the single-wave average output optical power under each gain is equal to the single-wave maximum

Raman amplifier board needs to use APC fiber optic connector

The receiving range of the monitoring channel board: -45dBm-8dBm measured during commissioning

69. The range of 1+1 protection in the OTU board is the optical fiber on the OCH path, that is, the optical fiber between the dual transmission of the source OTU board and the selective reception of the sink OTU board. Unable to protect the OTU board

TRUE

FALSE

70. NE1, NE2, NE3, NE4, and NE5 form an MSP ring, and 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 a fiber cut occurs for the first time (between NE1 and NE2), MSP switching is normal. When the fiber is cut for the second time in the MSP ring (between NE3 and NE5), the SNCP service is interrupted and no SNCP protection switching occurs.

What are the solutions?

Set the HP_UNEQ alarm as the trigger condition for SNCP switching

Remove delay time

Change STM-1 rate to STM-4

Remove NE4

Page 8 of 17

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

Improve spectrum utilization to meet the flexible scheduling requirements of the future super 100 Gbit/s rate era.

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

WSMD2 single board supports F1exible ROADM configuration

Flexible ROADM is compatible with existing networks

72. For OSN series equipment, what alarm will be reported when one of the PIUs is not connected to the power supply?

POWER_DIFF_OVER

POWER_FAIL

BD_STATUS

OWER_ABNORMAL

73. The frame frequency () of different levels of STM grades, the transmission rate is different.

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

75. 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

76. Regarding the TTX single board, which of the following statements is correct?

In essence, the TTX board is not a 100G tributary board, but it requires a single-slot 100G crossover capacity

8800 T64/ T32 universal subrack can support TTX single board

This board belongs to the tributary board and can access 100G client-side services

TTX can do ODU4 particle electrical crossover with NS4

77. The insertion loss of the 40 demultiplexing channels of D40 is 6dB, regardless of the influence of noise. When the signal is full wave, the optical power of the IN port of D40 is X dBm. If the optical power of the IN port is reduced by 1dB, one of the output The measured value of the mouth is () dBm. (Assuming that the optical power of each channel is balanced, lg40=1.6)

(X-5)

(X-6)

(X-22)

(X-23)

78. Which of the following functions can the PTN device implement through the GE optical interface of the Ethernet processing board? (Multiple choice)

Interfacing with customer equipment

Interconnect with PTN equipment

Docking with STM-N interface

Interconnect with ODUk interface

Achieving Physical Layer Synchronization

Achieve IEEE 1588 V2 synchronization

79. Regarding U2000 dual-machine deployment, which of the following statements is wrong?

When using the maintenance tool to perform dual-machine active-standby association operations, the initiator is the primary site, and the data will be copied from the remote server specified by the initiator

The dual-machine active-standby association will automatically stop the NMS of the standby site, and then automatically start the NMS of the primary site. If the NMS of the primary site has already been started, the NMS will not be restarted

To configure time/time zone, you need to close the database

During the process of associating/separating the primary and secondary sites, it is found that VCS prompts a connection error. This situation is problematic. It is necessary to check the heartbeat communication between the primary and secondary sites

80. Which of the following is the reason for the failure of the interconnection between OTN and SDH? (Multiple choice)

The line fault between WDM equipment and SDH equipment

WDM product docking board interface client-side parameter configuration error

The wave branch is multi-mode, and the SDH line is single-mode

The OTN host version is too low

Page 9 of 17

81. 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

82. Before upgrading OTN 6800/8800 equipment as required, it is necessary to return the network element health check file to TAC for analysis

TRUE

FALSE

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

Only the port on the WDM side will report the 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

84. Array grating (AWG) multiplexer/demultiplexer has the following advantages: short wavelength spacing. large channel and flat passband. Suitable for ultra-high-speed and large-capacity DWDM systems.

TRUE

FALSE

85. 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

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

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

The crossover granularity is GE or Any signal

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

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

87. 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 NE is not created or created incorrectly

The smart feature is not enabled on the peer end

The DCC between two NEs fails

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

88. All operations on site can be operated according to one's own experience, and there is no need to strictly follow the changing operation steps

TRUE

FALSE

89. For a point-to-point topology, it is necessary to set the TIM detection mode on the network management system to only compare DAPI with the path terminal sink.

TRUE

FALSE

90. In a 25GMSP ring composed of four MSTP stations. When protection switching occurs. Which of the following statements about alarm reporting are correct?

PS alarms are reported on the tributary board

APS-INDI alarm reported on XCS board

Report the APS-INDI alarm on the system dashboard

Report APS-INDI alarm on board

Page 10 of 17

91. A new TN55ND2 board was added to the OSN8800 device, and it was found that the board could not go online. Which of the following are impossibility reasons?

The main controller has SWDL_AUTOMATCH_INH alarm

The main controller has SWDL_PKG_ NOBDSOFT alarm

The main controller has SWDL_CHGMNG_NOMATCH alarm

The main controller has SWDL_BD_WEAKMATCH alarm

92. 1588V2 clock enters non-trace working mode, report alarm CLOCK_NO_TRACE_MODE, which of the following are possible reasons? (Multiple choice)

Some nodes in the network have activated the SSM protocol, and some have not activated the SSM protocol

The original priority table of the system clock is not configured, and the network element uses its own default priority table

In the clock source priority table, other clock sources except the internal source are lost or the frequency deviation is too large

PTP clock configuration error

When 1588V2 frequency synchronization is enabled, the configuration or link is abnormal

93. For a WDM network, the networking is shown in the figure.

Now due to the needs of new services, there are two waves at site B that need to go up and down, that is, to transform the OLA site into a back-to-back OTM site. Which of the following is wrong?

When the site type is transformed from OLA to back-to-back OTM, boards such as M40/D40/OA/OUT need to be added. It is necessary to evaluate whether the existing network subrack slots are sufficient. If a new subrack needs to be added, it is necessary to evaluate whether there is space for installing a new subrack

Since the original network dispersion is normal compensation, 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 section of AB, BE, and AE, and evaluate whether the designed signal-to-noise ratio can meet the needs of service reception

Make an optical power budget for the new service trunk section, 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

94. After the OTN device is interconnected with the storage device, the actual service rate is less than 20% of the interface rate. Which of the following are possible reasons? (Multiple choice)

The FClicense configuration of the storage switch is incorrect

There is a problem with the optical power of the docking

The interface rate does not match

The connecting port of the transmission device has not enabled the remote function

95. Among the following boards, regardless of whether protection is configured, which options will interrupt the services passing through the board when replacing the board? (Multiple choice)

Packet board

Optical power amplifier board

Light protection veneer

Optical multiplexing and demultiplexing boards

96. Regarding the OSNR test of the OTN system, which of the following statements is correct? (Multiple choice)

When using OSA to test OSNR, because it is impossible to directly test the noise in the signal band, the out-of-band noise interpolation method is used to calculate the noise in the band

Out-of-band noise interpolation refers to replacing the actual noise of the system with the instrument insertion noise

After the wavelength signal passes through a filter device such as D40, the noise power between channels will be reduced, so the OSNR value of the traditional OSA test is relatively high

The 40G and 100G wavelengths overlap due to the signal spectrum, and the OSNR value tested by the traditional OSA test method is low

The integration method to test OSNR is also called the shutdown method, and the channel service will be interrupted during the test. And when the wave number is small, there is a certain deviation between the OSNR value measured by the integral method and the true value

OptiX OSN8800/6800 equipment MCA online test 100G wavelength OSNR also adopts the shutdown method

97. 40 Gbit/s and 100 Gbit/s coherent systems do not require dispersion compensation, because the coherent board has a large dispersion tolerance. NGWDM does not support mixed transmission between non-coherent and coherent networks.

TRUE

FALSE

98. Which of the following scenarios require dispersion compensation? (Multiple choice)

In a point-to-point 80-wavelength 10G system, the dispersion coefficient of the known optical fiber is 20ps/(nmkm), and the distance from A to B station is 80 kilometers.

In a point-to-point 40-wave 10G and 100G mixed transmission system, the dispersion coefficient of the optical fiber is 20ps/(nmkm) and the distance from station A to station B is 80 kilometers.

In a point-to-point 40-wavelength 100G system, the dispersion coefficient of the fiber is 20ps/(nmkm), and the distance from A to B station is 80 kilometers.

In a point-to-point 40-wavelength 10G and 2.5G mixed transmission system, the dispersion coefficient of the optical fiber is 20ps/(nm:km), and the distance to station B is 80 kilometers.

99. Four network elements A, B, C, and D form a two-fiber bidirectional multiplex section shared protection ring, and there are a large number of PDH services between A and B. One day, the optical fiber between A and B is interrupted. In order to eliminate the R-LOS alarm on the network management system, an engineer performs a self-loop on the optical ports at both ends of the interrupted optical fiber. After 10 minutes by default, what will happen?

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

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

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

The business between A and B is not affected, and the switching alarm disappears

100. Regarding the description of SNMP, which of the following descriptions is wrong?

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

SNMP can be applied between the upper and lower layer network management, and can also be used between the device and the 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 NE devices.

Page 11 of 17

101. Data collection is very critical for on-site maintenance engineers. It can not only understand and deal with faults well, but also provide basis for future processing. What information do EMS/EFS/EGS boards need to collect for data collection? (Multiple select)

Public basic data that requires feedback, such as version and other basic information

EPL/EPLn business issues require feedback data such as the number of VCTRUNKs, etc.

EVPL/EVPLn business issues require feedback data such as test frame feedback information, etc.

Special configuration issues require feedback data such as Qos, etc.

102. The size of the OTUk frame is fixed, that is, whether it is OTU1, OTU2, or OTU4, it has 4 rows and 4080 columns.

TRUE

FALSE

103. Which of the following descriptions about MPLS Tunnel 1+1 protection and 1:1 protection is correct? (Multiple choice)

If you want to protect MPLS Tunnel, you need to create an MPLS Tunnel protection group

Dual transmission and selective reception of services protected by MPLS Tunnel 1+1, single transmission and single reception of services protected by MPLS Tunnel 1:1

The services protected by MPLS Tunnel 1:1 include double-ended switching and single-ended switching. MPLS Tunnel 1+1 protection only has single-ended switching

The APS protocol protected by MPLS Tunnel 1:1 transmits the protocol status and switching status to each other through the guaranteed tunnel transmission

104. The OTU2 frame length is about four times the OTU1 frame length

TRUE

FALSE

105. Which of the following is not included in the performance evaluation of WDM networks?

Single-wavelength optical power & flatness

OSNR

Combined optical power

Monitor signal optical power

Dispersion & FEC BER

106. CORBA (Common Object Request Broker Architecture) common object request broker system is a mature industry standard for inter-object communication. It provides a platform-dependent programming interface and model for portable, object-oriented distributed computing applications. It does not depend on languages, platforms, network protocols, etc., making it very suitable for existing distributed system applications Program development and system integration.

TRUE

FALSE

107. The optical amplification unit can make up for the line loss and increase the transmission distance, and the system transmission distance can be extended to infinity by means of multi-level cascading

TRUE

FALSE

108. Which of the following is wrong in describing the networking requirements for configuring SOM?

The OSC board must be configured in the network

The outbound optical amplifier at the originating end of the OMS segment must be configured with an MCA board

An OA board must be configured between the FIU board at the receiving end site of the OMS section and the ROADM board or multiplexer board.

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

109. Among the maintenance signals at the ODUk level, which maintenance signals are included in the STAT bits of both PM and TCM? (Multiple choice)

AlS

LCK

lAE

OCl

110. Which of the following descriptions about PM_BIP8-related alarms is correct?

The PM_BIlP8_DEG alarm indicates the signal degradation alarm of the PM section at the ODU layer.

The PM_BIP8_SD alarm indicates the signal degradation alarm of the PM segment at the OTU layer.

The PM_BIP8_OVER alarm indicates that the ODU layer PM bit error amount exceeds the limit alarm.

Page 12 of 17

111. The sequence of downlink signals, which of the flowing through the functional blocks of the SL16 circuit board?

SPI, RST, MST, MSP, MSA, HPT

HPT, MSA, MSP, MST, RST, SPI

SPI, MST, RST, MSP, MSA, HPT

HPT, MSP, MSA, MST, RST, SPI

112. What are the main technical indicators for measuring filters? (Multiple choice)

Insertion loss

Bandwidth

Power Consumption

Crosstalk

113. In the SNCP ring network composed of OptiX OSN 3500 devices, the cross board adopts GXCSA, and the main ring is configured with SL64 single board. A and B are two adjacent nodes. Station B receives a large number of errors in the regenerator section and multiplex section reported by the SL64 board of station A. At the same time, station A receives the remote code errors of the multiplex section reported by the SL64 board of station E. Research In the network diagram, it is found that the distance between A and B is 100km, the rate is 10G, and the configuration structure is "bare board+BA+PA+DCU+bare board".

Which of the following causes code errors? (Multiple choice)

The coordination between the cross-connect board and the circuit board leads to bit errors

DCU module model error

Insufficient BA+PA gain leads to bit errors

Optical board faults lead to bit errors

114. () is the core equipment of the access network, and is the access convergence point of various services such as voice, data and image.

115. What should be paid attention to when adjusting the antenna? (Multiple choice)

During commissioning, there is no rain/snow/fog effect between the two sites

ATPC function is off

If the microwave link adopts 1+1 protection configuration and uses one antenna, turn off the power of the standby ODU before swapping the antennas

Turn on the AM function

116. When using OSN8800 T32, if you need to set the ID numbers of the master and slave subracks, on which board should you set them?

EFI

EFl1

EFl2

SCC

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

If recovery is selected as the protection type, it is recommended to set the waiting recovery time within the range of 5 to 12 minutes, and the recommended setting is the default value of 10 minutes

It is recommended to enable reverse switching to prevent invalid RDI switching at the originator due to signal fading

It is recommended to set the "alarm reporting method" to "only protection group reporting"

Although 1+1 HSB has no restrictions on the slots of IF boards, it is still recommended that the main/standby IF boards be installed in dual slots

118. When the input optical power of the amplifier of the OAU at the receiving end is lower than the nominal optical power, which of the following operations are wrong?

Adjust the adjustable optical attenuation before the receiver amplifier to increase the input optical power of the amplifier

Set the OAU gain to make its output reach the nominal value

Increase the sending optical power of the sending end

When the input optical power cannot be increased by adjusting the adjustable attenuator, the adjustable attenuation at the input end of the amplifier should be suppressed

119. When configuring the basic properties of the Ethernet interface of the EM20 single board, in the case of not transmitting JUMBO frames, the default value of "maximum frame length" is?

1522

1491

1490

9600

120. XPIC can be used in conjunction with ATPC, but it is not recommended to use it in general.

If it needs to be used together, what should be paid attention to? (Multiple choice)

If AM is used together, set the upper threshold of ATPC to the lower threshold plus 5d

The horizontal polarization link and the vertical polarization link of a group of XPICs should be configured with the same ATPC parameters (ATPC enablement, ATPC adjustment threshold).

Set the difference between the upper and lower thresholds of ATPC as small as possible, 5dB is recommended.

Set the ATPC lower threshold to be greater than the planned AM sensitivity in full-capacity modulation mode plus 14d

Page 13 of 17

121. The frame structure, framing method, and encapsulation method of time slot information in the device-aware TDM circuit is?

CESoPSN

QINQ

SAToP

MPLS

122. Which of the following are include in preparation conditions for single station commissioning of transmission equipment? (Multiple choice)

Whether the hardware installation is qualified

Whether the power supply is available

Whether the relevant optical fibers and cables are installed in place

Make sure the network management program installed on the laptop is normal

123. Which of the following are technical characteristics of MPLS? (Multiple choice)

Connectionless-oriented control plane

Connectionless-oriented forwarding plane

Connection-oriented control plane

Connection-oriented forwarding plane

124. The TE link in the OTN electrical layer ASON is unidirectional. For example, there are two TE links between NS2 and NS2. The final number of links is the number of smart N-board ports (including relay N-boards).

TRUE

FALSE

125. Which of the following ROADM boards have WSS optical modules? (Multiple choice)

WSMD9

wSD9

WSM9

RDU9

126. During the downgrading process of the smart service, the intermediate node is reset, and the downstream node will have?

Signaling residue

Slot Reservation Residual

Slot inconsistency remains

127. The existing network needs to be transformed into 1+1 line protection of OMS. Which of the following descriptions is correct? (Multiple choice)

The OLP board needs to use a high-power board

The line attenuation deviation of the main and standby channels is within 3dB

The line distance deviation of the main and standby channels is within 10KM

The configuration of the amplifier boards of the main and standby channels can be different

The dispersion compensation of the main and standby channels can be different

128. OSN6800 reports a commun_fail alarm on the SCC board of subrack 2. The third digit of the parameter is 0X04. The network element is not disconnected. There is no abnormal alarm on the master subrack and slave subrack 1. Which of the following is the possible cause of the failure? (Multiple choice)

The AUX board of the main subrack is faulty

The AUX board of slave subrack 2 is faulty

The AUX board of slave subrack 3 is faulty

Faulty network cable between subrack 2 and 3

129. 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 DCM is placed between the two OBUs

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

130. Regarding the SSM protocol, which of the following statements is correct? (Multiple choice)

When the SSM protocol is not enabled, the clock network can only be configured as unidirectional and cannot form a loop.

When the extended SSM protocol is started, the clock network can be configured as bidirectional and can form a loop.

When the standard SSM protocol is started, the clock network can be configured to be bidirectional, but cannot form a loop

Whether to activate the SSM protocol has little effect on the clock network.

Page 14 of 17

131. Which of the following statements about network element package loading and package diffusion upgrade is correct? (Multiple choice)

Configure activation groups, gateway NEs and non-gateway NEs cannot be in the same group

The number of network elements in the package diffusion upgrade task shall not exceed 15.

Package maintenance software upgrade tasks do not need to include gateway network elements

Package diffusion software upgrade can only include one gateway network element at most, and the non-gateway network elements in the task must belong to the same gateway network element.

132. The maximum number of VBs supported by the EGS4 series of OSN equipment is 2, and the maximum number of VBs supported by the EFS4 series boards is 16.

TRUE

FALSE

133. Which of the following description about single-station commissioning is wrong?

If the input voltage of the equipment is not within the required range, suggestions for rectification should be put forward, and it is strictly forbidden to power on

It is strictly forbidden to plug and unplug the power plug and PIU board with power on

In the case of power failure, you don’t need to wear anti-static wrist or anti-static gloves to touch the single board

After the single station hardware inspection is completed, make sure that all power switches are in the OFF position

134. For a coherent system, the reference point of the fiber-in optical power in the non-standard fiber-in scenario is moved from the output port of the optical amplifier board at the sending end to the output port of the FIU

TRUE

FALSE

135. WDM is a technology that simultaneously transmits () optical signals on the same optical fiber.

136. Which of the following statements is correct? (Multiple choice)

Veritas is a highly reliable system composed of volume manager, volume replicator, local cluster software, etc.

In any case, the standby machine does not write data to the data replication buffer

The volume manager and volume duplicator manage physical disks through logical "volumes", so the operating system and U2000 software are located on them

Local dual-machine, Linux can use the Bond method to connect externally and support floating IP at the same time

137. In a WDM system, after a certain distance of transmission, the optical signal-to-noise ratio of the signal at the receiving end will decrease to a certain extent, Which of the following are the most important reason?

Fiber attenuation is too large

Use of demultiplexer

Use of EDFAs

No new fiber optics are used

138. Which of the following descriptions about WDM equipment hardware is correct? (Multiple choice)

The difference between the optical power of the MON port and the optical power of the OUT port on the M40 board is 10dB

The ID of the master and slave subracks is determined by the dial code on the SCC board

In OSN 8800, OBU1 can be used for both the sending end and the receiving end

On any OSN 8800 equipment subrack, slots 9 and 10 can only be used to insert XCS boards

139. When creating an electrical layer path, which are the correct options for the analysis of the reasons (Client, ODUK, ODUr1ex level) that may cause route calculation failure? (Multiple choice)

Routing resources are unavailable

Services cannot be created between ports

The optical power attenuation on the service layer path OCH is too large

Unable to satisfy routing constraints

140. Which of the following descriptions about the process of optimizing the abnormal line attenuation compensation is correct? (Multiple choice)

According to the user's adjustment instruction, start the adjustment of the line attenuation for the OCh path, so that the output of the downstream optical amplifier reaches the normal value.

The SCC board at the downstream site of the fault reports an alarm to the power detection unit (OA) of the head node through DCN communication, and the head node SC reports an alarm to the SO

After receiving the alarm, the SOM obtains the OCh path corresponding to the alarm and adds it to the management path to be optimized.

The downstream power detection unit (OA) detects that the line attenuation deviation exceeds the threshold, and reports an alarm to the SCC board of its own station.

Page 15 of 17

141. Using the integral method to measure the OSNR value of a 100G signal, the integrated value of the signal power + noise power in the channel interval read from the OSA is 9.68uW, the integrated value of the noise power in the channel interval is 29.58nW, and the signal center frequency is 0.1nm. The integrated power within is 7.395nW, then the OSNR value is?

10log [(9.68-0.02958)/0.007395]

10log [(9.68+0.02958)/0.007395]

10log [(9.68-0.007395)/0.02958]

10log [(9.68+0.007395)/0.02958]

142. () is called the optical transmission section in Chinese, and (OMS) is called the optical multiplexing section in Chinese.

143. In the characteristic test of the splitter (multiplexer), what standard should the isolation test meet?

<20dB

<25dB

>20dB

>25dB

144. Which of the following abnormal conditions will trigger the occurrence of TPS protection switching of PTN equipment?

The job processing board is offline

Working interface board offline

Interruptions caused by non-hardware reasons for the business on the work processing board

The service interface of the working interface board is loose

145. The SPC software is permanently connected. It is a service connection between PC and SC. The user to the network part is directly configured by the network management plane, and the connection of the network part is initiated by the network management plane to the ingress network element control plane, which is completed by the ingress network element control plane through signaling

TRUE

FALSE

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

OTUk_BBE

OTUk_SM_FEBBE

OTUk_SM_FEES

OTUk_PM_BBE

147. Discrete services are cross-connections that do not form paths on the network management system. Since no paths are formed, they are garbage services and can be deleted directly.

TRUE

FALSE

148. In the 40-wavelength system of the WDM equipment, due to the aging of the optical cable of the customer, the optical cable between the 2# and 3# sites need to be replaced, and the 4# optical amplifier site needs to be added between 2# and 3#. Which of the following statements is correct?

The optical power of site 2# does not need to be commissioned again

The optical power of site 3# does not need to be commissioned again

Need to consider whether the dispersion budget is sufficient

There is no need to consider whether the dispersion budget is sufficient

149. When configuring 1+1 optical line protection, RI1/TI2/TO2 can be selected as the working channel according to the actual situation.

TRUE

FALSE

150. 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 16 of 17

151. In the actual deployment of 1588v2, there will be asymmetry in the length of the sending and receiving fibers. What are the main solutions for fiber asymmetry in the industry? (Multiple choice)

Single fiber bidirectional

The meter measures point by point

Ring network manual measurement

Ring network automatic measurement

152. Which of the following signals can be used as the input or output signal of the external clock interface? (Multiple choice)

2.048Mbit/s

34Mbit/s

155Mbit/s

2.048MHz

153. When the microwave link acts as an ECC link, the network management will not receive the abnormal HSB switching event of the non-gateway network element.

TRUE

FALSE

154. MC_LAG can only be configured in non-load sharing mode.

TRUE

FALSE

155. Which of the following methods can the network-side transmission tunnel of PTN equipment realize service isolation? (Multiple choice)

MPLS

VLAN

S-VLAN

156. Which of the following are significance of engineering survey? (Multiple choice)

Confirm the design plan

Guide complete stocking

Confirm the installation environment

Guide installation and implementation

157. When the capacity of the cross-connect board is upgraded, if the dual cross-connect configuration site is replaced, two cross-connect boards with different capacities will exist at the same time. At this time, the cross-connect board switching will cause a long-term service interruption.

TRUE

FALSE

158. What problems in the network cannot be solved by QoS?

Service Bandwidth

Delay jitter in transmission

Packet loss rate

Transmission resources

159. In the following OTN frame structure, which item represents the path tracing identifier?

BDI

TTI

BIP8

GCco

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

TRUE

FALSE

Page 17 of 17

161. Which of the following is unnecessary when testing the overload point and sensitivity of the IN port of the OTU board?

Optical power meter

Attenuator

SDH Analyzer

OTDR measuring instrument

162. In the network, clock devices are usually used to ensure network synchronization. Different clock sources are selected according to the requirements of different clock accuracy. If the clock accuracy of G.811 is to be met, which clock source can be selected? (Multiple choice)

GPS+rubidium atomic clock

GPS+ crystal clock

Cesium atomic clock + Rubidium atomic clock

Beidou + rubidium atomic clock

163. If the instrument transmits data at a frame rate of X and receives data at a frame rate of Y, then packet loss rate = (XY)/X*100%, usually packet loss rate + throughput = 1

TRUE

FALSE

164. In the SDH network, the S1 byte is used to transmit the synchronization status information. Which of the following S1 byte values represents the G.811 recommended clock?

0x00

0x02

0x04

0x0b

0x0f

165. TN55TQX+TN53NQ2 network element) -----TN53NQ2+TN55TQX (B network element) networking, the network element is a synchronous system, 10GELAN MAC transparent mapping mode, ALS function is enabled, and the interconnection with the router is normal. At this time, if the 10GELAN mode of A network element 55TQX is changed to BIT transparent mapping mode, what are the new alarms of A network element 53TQX? (Multiple choice)

ODU2_LOFLOM

ALS_ACTIVE

REMOTE_FAULT

REM_SF

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

2-1-1

1-2-1

1-1-2

2-2-1

167. In the Colored&Directioned scenario of 4D ROADM, how many sets of M4OV+D40 are needed to realize local business scheduling to four directions?

168. SOM is an optical layer intelligent management solution, which is only used for single-wavelength optical power and OSNR detection of coherent 40G and 100G systems

TRUE

FALSE

169. ODUk_PM_AIS alarm is one of the conditions for ODUK_SNCP switching

TRUE

FALSE

170. Which of the following authorizations need to be obtained for live network change operations? (Multiple choice)

Customer Authorization

Technology Licensing

Administrative Authorization

Supervisor Authorization

Project Authorization

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Huawei HCIE-Transmission H12-931-ENU Mock Questions and Answers

Huawei HCIE-Transmission H12-931-ENU Mock Questions and Answers

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