H12-931-ENU Exam Questions [2023] – Effective Way to Prepare For HCIE-Transmission (Written) Exam

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1. A certain network has 2,250 equivalent network elements of SDH series, 1,000 equivalent network elements of WDM series, and 1,000 equivalent network elements of router series. The customer purchased value-added functions such as SDH end-to-end, WDM end-to-end, and Corba northbound.
Regarding this network management deployment plan, which of the following is wrong?

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

The maximum management capacity of the SDH network element manager subsystem is 2500 equivalent network elements, so one SDH network element manager instance needs to be deployed; the maximum management capacity of the router network element manager subsystem is 5000 equivalent network elements, Therefore, a router NE manager instance needs to be deployed

Due to the purchase of SDH end-to-end and WDM end-to-end value-added features, it is necessary to install SDH network management subsystem and OTN network management subsystem; due to the purchase of Corba northbound interface, it is necessary to install Corba northbound subsystem

If the OTN series network elements are OSN 6800+OSN 8800T32 (without ASON, the ratio of the two numbers is 1:1), among which OSN 6800 is used as the master subrack, and OSN 8800 is used as the slave subrack. And each master subrack carries only one slave subrack. The actual number of OSN 8800 physical network elements is 125

Question 1 of 25

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

After upgrading the standby main control board first, the upgrade of the original active main control board can be completed only through active-standby switchover

Upgrade the active main control board first, and then upgrade the standby main control board

Complete the upgrade of the standby main control board first, then perform a hard reset on the current active main control board to make it active and standby, and then upgrade the current active standby main control board

First upgrade the main main control board and then upgrade the standby main control board in the same way

Question 2 of 25

3. 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

Question 3 of 25

4. For 10G and coherent 100G mixed transmission systems, which of the following description is correct?

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

Commissioning needs to be carried out according to the commissioning requirements of 100G, that is, non-standard in-fiber optical power commissioning method

For 100G single wave, due to the large dispersion tolerance, the dispersion compensation can be compensated according to the compensation principle of 10G

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

Question 4 of 25

5. Which step in the working principle of CORBA does getEventChannel belong to?

Session maintenance

Session Announcement

Information inquiry

Session initialization

Question 5 of 25

6. When subnetting 172.17.15.0/28, 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

Question 6 of 25

7. Create an upgrade task process, which of the following statement is wrong?

The upgrade operator must use the "admin" level user for the health check, otherwise some check items will fail and the check efficiency will be reduced.

For gateway NEs, if the configuration item "If the NE to be loaded is a gateway NE, force FTP/SFTP to be loaded" is selected, an FTP/SFTP server needs to be configured on the network management server to increase the loading speed.

"Force Parallel Activation". In this activation mode, all groups are activated in parallel, which will cause service interruption.

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

Question 7 of 25

8. 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

Question 8 of 25

9. Which of the following about system OSNR commissioning is wrong?

Adjust the single-wave level first, and then adjust the optical power of the main line

One of the commissioning principles for OSNR flatness of the MPI-R point system: After the pump power is determined, use a spectrometer to detect the OSNR flatness of the MPI-R point. If the OSNR flatness does not meet the standard (OSNR flatness index ≤ 2dB), then need to adjust M40V

The multiplexer is an M40V single board, "look at the receiving end, adjust the sending end", in the case of ensuring that the optical power flatness meets the index requirements, the optical power flatness can be sacrificed to ensure the flatness of OSNR (or BER)

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

Question 9 of 25

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

HSB

SD+FD

Question 10 of 25

11. Which of the following with the docking workflow between U2000 CORBA and OSS is wrong?

Start the name service Start the notification service Start U2000 CORBA

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

OSS connects to name service through CORBA client The CORBA client of OSS finds the event channel through the name service

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

Question 11 of 25

12. The function of PW OAM is basically the same as that of Tunnel. The PW OAM mechanism can effectively detect, confirm and locate defects and faults originating from the PW layer network.
Which of the following functions are not available in PW OAM?

Ping

BDI

FDI

Question 12 of 25

13. 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

Question 13 of 25

14. Regarding the test items of IEEE 1588V2 time protection function, which statement is wrong?

On the OptiX OSN 8800, the active and standby states of the clock board and the cross-connect board are related to each other. During the switching test, it is recommended to switch only the cross-connect board or the clock board.

On the OptiX OSN 6800, the active and standby states of the clock board and the cross-connect board are related to each other. During the switching test, it is recommended to switch only the cross-connect board or the clock board.

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

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

Question 14 of 25

15. When Huawei OTN is interconnected with ZTE OTN equipment, the ODU0 and ODU1 time slots of Huawei OTN equipment adopt sequential mode. Which of the following statements is correct? (Multiple choice)

The order of ODU1 is the same

The order of ODU1 is different

The order of ODU0 is the same

The order of ODU0 is different

Question 15 of 25

16. 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

Question 16 of 25

17. Regarding the electrical layer protection ODUk SNCP and branch SNCP, which item is different from the following description?

Cross grain

Scope of protection

Protected Subtypes

Working principle

Question 17 of 25

18. There is a lower limit to the length of an Ethernet frame. What is the main reason for this?

Carrier sense

Multi-point access

Conflict detection

Improve network bandwidth utilization

Question 18 of 25

19. Which of the following are not precautions for the preliminary test?

Before the test, check whether the required test lines are complete, the type of connector and the applicability of the instrument, and whether the connection is good.

Prepare cotton swabs and alcohol, and pay attention to the cleanliness of the connectors at all times during the optical interface characteristic test to ensure the accuracy of the test data.

Be careful not to look directly at the optical sending interface during the test, so as not to damage the eyes.

During the 24-hour bit error test, it should be ensured that the entire test process is free from external interference (including human factors and power conditions, etc.). If there is an exception, the exact time of the exception should be recorded or re-tested. The test time does not need to exceed 24 hours.

Question 19 of 25

20. 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]

Question 20 of 25

21. The LPT (Link Pass Through) function is applied to the scenario where WDM equipment accesses FE/GE/10GE LAN services. Which statement about LPT is correct? (Multiple choice)

It makes the user equipment perceive the link status information by turning off and 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 LPT (Link Pass Through), and the differences are mainly reflected in applicable services, fault transmission methods, and laser restart mechanisms.

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 running status of the network access point or service network can be monitored.

Question 21 of 25

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

When using OLP or DCP with an LSC board to achieve 1+1 protection within the board, the switching mode can be set to single-ended switching or double-ended switching

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

40G/100G coherent 1+1 protection compared to 40G eDQPSK, the protection channel does not need additional TDC board

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

Question 22 of 25

23. What are the principles of synchronous Ethernet planning? (Multiple choice)

When there is BITS or other high-precision external clock devices, it is recommended that network elements use tracking external clock sources

When there is no BITS or other high-precision external clock devices, it is recommended that network elements track the line clock source

The internal clock source is recommended as the lowest level clock source

When stopping the SSM protocol, do not configure the clock in a ring in the network. When starting the SSM protocol, the SSM protocol information of all network elements in the local network must be set to be consistent

Question 23 of 25

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

VPLS (Virtual Private LAN Services, virtual private LAN service), is a service that provides LAN-like services on an MPLS (Multiprotocol Label Switching, Multiprotocol Label Switching) network

VSI is a virtual layer 2 forwarding entity, which defines the number of members of the VPLS domain on the PE, similar to a virtual switch

The PE can decide whether to forward the Ethernet frame directly to the CE or to the peer through the PW only according to the VLAN ID in the user message without other parameters (such as the destination MAC address in the message, etc.) PE

You need to manually configure split horizon groups to avoid Full-mesh VPLS loops

Question 24 of 25

25. The IP address you use is 165.247.52.119, the subnet mask is 255.255.240.0, which subnet is your host on?

165.247.52.0

165.247.32.0

165.247.56.0

165.247.48.0

Question 25 of 25

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H12-931-ENU Exam Questions [2023] – Effective Way to Prepare For HCIE-Transmission (Written) Exam

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