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質問 121
The transmission plane mainly performs functions such as optical signal transmission, configuration protection switching, and reconnection, and ensures the reliability of the transmitted optical signal. However, the switching action of the transport layer is performed under the influence of the management dry surface and the control plane.
- A. TRUE
- B. FALSE
正解: A
質問 122
The following description of the cross-board of the OSN 8800 T64 subrack. Which is correct? (Multiple choice)
- A. XCT+SXM can be used together to provide an ODUK crossover with a total capacity of 2.56 Tbit/s.
- B. XCT+SXM can support ODU0, 1, 2, and 3 levels of crossover.
- C. XCT+SXM can be regarded as a whole when working. If any faulty, the two boards will be switched together.
- D. Enhanced subrack can only be configured with UXCT+USXM or UXCT+USXH
正解: A,B,C,D
質問 123
The following description of the use of synchronous methods to create fiber optics, which is wrong?
- A. Collision fiber refers to the fiber that is configured on the network element side and is inconsistent with the configuration on the network management side.
- B. If there is a fiber that is not created on the U2000 or a fiber that is not created on the network element, you need to synchronize or create it.
- C. The existence of a conflicting fiber does not affect the configuration of the path, so it can be ignored.
- D. The fiber exists on the network management side and the network element side, and the fiber with the same information is not required to be created.
正解: C
質問 124
In the WDM networking design, as long as there are enough EDFA cascades to compensate for the loss of optical power during transmission. Then the system can transmit a long distance without restriction.
- A. TRUE
- B. FALSE
正解: B
質問 125
Which of the following are components that reuse N wavelengths in WDM system? (Multiple choices)
- A. Optical amplifier unit
- B. WDM unit
- C. Optical repeater unit
- D. Supervision unit
正解: A,B,C,D
質問 126
Which of the following operating modes does the AT8 board support? (Multiple Choice)
- A. 2E2M
- B. Reverse 1E1M
- C. Reverse 2E2M
- D. 1E1M
正解: A,C,D
質問 127
What does the component of the ASON network not include?
- A. ASON domain
- B. Intelligent network element
- C. TE link
- D. SC
正解: D
質問 128
Since the nonlinear effect is generated, its influence on the service signal cannot be repaired. Therefore, the treatment of the nonlinear effect of the existing network is to avoid the occurrence of nonlinear effects.
- A. TRUE
- B. FALSE
正解: A
質問 129
Which of the following description of ODUk ring protection is wrong?
- A. The agreement must be completed after the protection configuration of each site on the ring network is completed.
- B. Ordinary ODUk ring network protection does not require setting a management node.
- C. Enhanced ODUk ring network protection, no need to set up management nodes. If the management node is set, there is no impact on protection.
- D. ODUk ring network protection is mainly applied to the ring network configuration of distributed services. It protects multiple distributed services between all sites by occupying two different ODUk channels.
正解: C
質問 130
The wave division system complement to chromatic dispersion mainly adopts the DCM compensation method. The following statements about DCM dispersion compensation, which is wrong?
- A. Improper configuration of the DCM will result in degradation of the receiving end performance.
- B. 10G system with line fiber length less than 400km, G.652 DCI can be used to compensate G.655LEAF).
- C. Improper configuration of the DCM will result in degradation of the system signal-to-noise ratio.
- D. The DCM module is more likely to cause nonlinearity than the line transmission fiber, so it is necessary to strictly control its fiber-optic power.
正解: B
質問 131
The main function of the transport layer in the Huawei ECC protocol stack is _____.
- A. Provide end-to-end communication services to the upper layer
- B. Provide data communication services.
- C. Establish and maintain an ECC routing table.
- D. Establish and maintain a MAC connection between neighboring network elements.
正解: A
質問 132
The optical and electronic shelves of the OSN 9800 are connected through the master-slave subrack cascading mode and connected through the GE 1/2 port on the CTu board.
- A. TRUE
- B. FALSE
正解: A
質問 133
Which of the following statements about Flexible ROADM is incorrect?
- A. The Flexible grid technology can flexibly set bandwidth and support flexible bandwidth allocation and scheduling.
- B. Flexible ROADM is compatible with existing networks.
- C. The WSMD2 board supports the Flexible ROADM configuration.
- D. Improves spectrum utilization and meets the requirements for flexible scheduling in the 100 Gbit/s era.
正解: A
質問 134
In the scenario where the non-convergence OTU processes OTN standard signals, both A and B are WDM sites. After receiving the OTUk_TIM alarm on the client side, the OTU board at station A sends the OTUk_BDI alarm to the upstream. When the TIM follow-up action is disabled, the alarm is no longer transmitted to the downstream. When the TIM follow-up action is enabled, an SF event is generated. The WDM side of the OTU board at station B reports the ODUk_PM_AIS alarm, and the ODUk_PM_AIS alarm is transmitted downstream. The client equipment reports this alarm. After the WDM side of the OTU board at station B receives the OTUk_TIM alarm and the TIM follow-up action is disabled, the alarm is no longer transmitted to the downstream. When the TIM follow-up action is enabled, an SF event is generated. After the client side of station B processes the SF event, the client equipment reports the ODUk_PM_AIS alarm.
- A. True
- B. False
正解: A
質問 135
The network element automatically backs up the network element database to the FLASH database every 30 minutes by default.
- A. TRUE
- B. FALSE
正解: A
質問 136
For the wavelength division system, configure the 1st-20th wave, use the NS4 single board, and test the M40 output port with the spectrum analyzer during the commissioning. It is found that the optical power of the 20th wave is significantly lower than the other 19 waves. The possible reasons are as follows: (Multiple Choice)
- A. The 20th wave OTU's RX port is incorrectly added with 5dB fixed light decay.
- B. The 20th wave OTU wave side light is too small
- C. The 20th channel corresponding to the M40V has a large insertion loss.
- D. The 20th wave OTU center is long drifted
正解: B,C,D
質問 137
Which of the following is a good way to avoid creating discrete paths? (Multiple Choice)
- A. The path with the protected route is to be broken or switched. Ensure that the configuration is complete and standardized.
- B. The service of the single-station configuration should perform path search on the network to ensure that the service configuration is complete and standardized.
- C. Guide users to learn business configuration specifications.
- D. Try to use the path function to configure.
正解: A,B,C,D
質問 138
In WDM transmission systems, the main factors affecting the unevenness of power balance of each channel which are not included? (Multiple choice)
- A. Cable aging is high
- B. The main channel dimming fader setting is unreasonable
- C. Non-uniformity of insertion loss of each channel of the multiplexer/demultiplexer
- D. EDFA gain unevenness
正解: A,B,C,D
質問 139
Which of the following description of discrete services is correct? (Multiple Choice)
- A. Discrete service management requires the U2000 license to have path management functions.
- B. For the cross-connections, after a path search, either a discrete service or forming a path with other cross-connections, which is impossible to be a discrete service, and forming a path with other cross-connections.
- C. A service is searched for a discrete service, indicating that the service is not working properly on the NE side.
- D. Perform path search on the U2000 network management. Cross-connections that do not form a path are called high-bandwidth services.
正解: A,B
質問 140
Which of the following are not part of the 400G originating modulation technology?
- A. Advanced oDSP algorithm
- B. FDDM/Nyquist spectrum compression technology
- C. Multi-carrier generation and multiplexing
- D. High-order modulation (xQAM)
正解: A
質問 141
The collection and storage of on-site data includes periodic collection during normal operation of the equipment and collection of equipment failures. Generally, before the fault is processed, the maintenance personnel must collect and save the field data.
- A. TRUE
- B. FALSE
正解: A
質問 142
Which of the following subracks does not support the configuration of packet board?
- A. OSN 8800 T16
- B. OSN 1800V
- C. OSN 1800II
- D. OSN 9800 P18
正解: D
質問 143
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