4A0-205リアル試験問題解答は更新された[2023年11月23日]
お手軽に合格させる 最新Nokia 4A0-205問題集には42問があります
Nokia 4A0-205（Nokia Optical Networking Fundamentals）認定試験は、光ネットワーキングの概念と原則に関する知識を検証したい専門家にとって重要な試験です。この試験に合格することにより、Nokiaのテクノロジーを使用して光学ネットワークを設計、実装、管理する能力を実証します。この試験では、光学ネットワーキングに関連するさまざまなトピックをカバーしており、複数の言語で利用できます。この試験に合格することは、ノキア光学ネットワーキングの専門家になりたい人にとっては要件です。
質問 # 15
Is it possible to modify node parameters within the edit EPT menu?
- A. Yes, the user can apply manual changes directly from this view
- B. Yes, the user can apply manual changes but only for non-GMPLS nodes, as the control plane reserves node resources not editable by the user
- C. No, this view is used to display a close-up view of the node
- D. Yes, but the user can modify only the node name and location
正解：B
解説：
Yes, the user can apply manual changes but only for non-GMPLS nodes, as the control plane reserves node resources not editable by the user. The edit EPT menu allows the user to view information about a node but is not used to modify node parameters. The user can only apply manual changes to non-GMPLS nodes, as the control plane reserves node resources which cannot be modified by the user.
質問 # 16
WDM allows transmission systems to:
- A. Increase the bit rate of each client signal by spreading it over multiple wavelengths
- B. Transport multiple signals transparently, onto several wavelengths, all together over one single fiber
- C. Share a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission
- D. Allocate different signals to different time slots
正解：B
解説：
WDM (Wavelength Division Multiplexing) allows transmission systems to transport multiple signals transparently, onto several wavelengths, all together over one single fiber. This allows for increased capacity, as many different signals can be transmitted at the same time and along the same fiber. Other advantages include improved signal integrity and reduced signal attenuation.
質問 # 17
With reference to trails and services, which of the following sentences is correct?
- A. Services are transported over trails; that is, services are clients with respect to trails.
- B. A service is always associated to a single wavelength, while a trail can involve multiple wavelengths.
- C. Trails are transported over services; that is, trails are clients with respect to services.
- D. A trail can interconnect three ports, while a service always two.
正解：A
解説：
Services are transported over trails; that is, services are clients with respect to trails. A service is a logical connection that is used to transport data from one point to another. It is created over a trail, which is a physical connection that is established by using multiple wavelengths. As such, services are clients with respect to trails, as they are transported over them.
質問 # 18
Which statement is correct about node synchronization?
- A. Full synchronization retrieves all items from the node (NE parameters. Ports, Alarms, Internal Links, etc)
- B. Full synchronization retrieves the correlated alarms from the node
- C. Node synchronization is executed to align the time of the node to the time of the NFM-T platform
- D. Node synchronization is executed to test the reachability of a node
正解：A
解説：
Node synchronization is a process of keeping the NFM-T database in sync with the nodes in the network. The synchronization process will download all the items from the node, including NE parameters, ports, alarms, internal links, etc., to the NFM-T database. This ensures that the NFM-T database is up to date and the network is running efficiently.
質問 # 19
What does it take to get connected to the NSP platform?
- A. A browser and the NSP IP address. Then, a browser plugin needs to be installed and the laptop rebooted before the NSP can be correctly reached.
- B. A browser and the NSP IP address; and from the landing page, the NSP application should be downloaded and launched.
- C. A browser, the NSP IP address, and the credentials to access the web-based interface (WebUI).
- D. The NSP package should be downloaded from the Nokia website and properly licensed for the specific workstation to be used.
正解：C
解説：
To get connected to the Nokia Service Platform (NSP) platform, you need a browser and the NSP IP address. Then, you need the credentials to access the web-based interface (WebUI) for the NSP platform. Once you have these, you can access the NSP platform from a web browser.
質問 # 20
Is it possible to mix PSS-24x and PSS-8x shelves In an SWDM configuration?
- A. Yes, but the PSS-8X shelf must be configured as a master
- B. Yes, as both can be equipped within the same node
- C. No, as they are not compatible and cannot be used within the same node
- D. Yes, but the PSS-24X shelf must be configured as a master
正解：C
解説：
No, it is not possible to mix PSS-24x and PSS-8x shelves in an SWDM (Short Wavelength Division Multiplexing) configuration. The two shelves are not compatible, and cannot be used within the same node.
質問 # 21
Which statement is correct about node synchronization?
- A. Full synchronization retrieves all items from the node (NE parameters. Ports, Alarms, Internal Links, etc)
- B. Full synchronization retrieves the correlated alarms from the node
- C. Node synchronization is executed to align the time of the node to the time of the NFM-T platform
- D. Node synchronization is executed to test the reachability of a node
正解：A
解説：
Node synchronization is a process of keeping the NFM-T database in sync with the nodes in the network. The synchronization process will download all the items from the node, including NE parameters, ports, alarms, internal links, etc., to the NFM-T database. This ensures that the NFM-T database is up to date and the network is running efficiently.
質問 # 22
How is it possible to check the activation status of GMRE on a node?
- A. The ControlPlane status column on the node list displays the GMRE status for the selected node
- B. The GMRE activation status is reported in the supervision state column on the node list
- C. The GMRE reachability can be tested via ping request from NFM-T
- D. The GMRE activation status is reflected on the color of the icon representing the node
正解：B
解説：
The GMRE activation status is reported in the supervision state column on the node list. The supervision state column displays the GMRE status of the node, which is either "Activated" or "Not Activated". This allows the user to quickly check the GMRE activation status of a node without having to ping the node from the NFM-T platform.
質問 # 23
What is the purpose of the validate step in the EPT design process?
- A. This step is optional and is useful to verify the network element layout before going through the commission step.
- B. During this step, the run design action is triggered for network design consistency check and errors fixing.
- C. This step is used to measure optical power performances over an existing network before making changes.
- D. During this step, the configuration available on the involved network elements is compared with the design provided by EPT.
正解：B
解説：
The validate step in the EPT design process is used to trigger the run design action, which is responsible for verifying the consistency of the network design and fixing any errors that may exist. During the validation process, the system will compare the configuration available on the involved network elements and the design provided by EPT, and any discrepancies will be flagged for further investigation or correction.
質問 # 24
Is it possible to open and manage EPT designs that are created with different releases than the release installed on the local workstation?
- A. Designs created with an older release can be opened by a current release but cannot make changes.
- B. Only designs created with current and older releases can be opened and edited.
- C. Only designs created with the current release can be opened and edited.
- D. No restrictions are imposed on the software release.
正解：B
解説：
It is possible to open and manage EPT designs that are created with different releases than the release installed on the local workstation, however only designs created with current and older releases can be opened and edited. Designs created with an older release can be opened by a current release but changes cannot be made.
質問 # 25
By using the EPT run design command, are the previously designed elements removed?
- A. Yes, although this is not happening in case of GMPLS-enabled nodes because existing slots cannot change as they are controlled by another manager (GMRE).
- B. Yes, they are but only the first time the command is launched as - for future design phases - the existing packs need to keep the same slotting.
- C. Not the design is always progressive, on top of the previous design.
- D. It depends, the user is prompted to choose whether to delete or leave the previously designed elements.
正解：D
解説：
The EPT run design command can remove previously designed elements, but the user is prompted to choose whether to delete them or leave them intact. This allows the user to progress their design while still keeping the existing elements in place. If the user selects to leave the existing elements, then they will remain in the same slots. If GMPLS nodes are used, the existing slots cannot change as they are controlled by another manager (GMRE).
質問 # 26
What is the OAMP LAN interface?
- A. It is an RJ-45 interface (a common Ethernet port) used to export active alarms to an external device, typically equipped with several LEDs
- B. It is an RJ-45 interface (a common Ethernet port) that has to be configured with an IP address for node reachability and management
- C. It is an RJ-45 interface (a common Ethernet port) used for cascading 1830 PSS nodes (e.g., external shelves)
- D. It is an RJ-45 interface (common Ethernet port) used to connect one or more client ports (e.g., 1Gb/s or legacy 100Mbit/s client flows)
正解：B
解説：
It is an RJ-45 interface (a common Ethernet port) that has to be configured with an IP address for node reachability and management. This interface is used to connect the OAMP node to the LAN, allowing it to be managed and monitored remotely.
質問 # 27
Which of the following are the main reasons for fiber attenuation?
- A. Refraction and reflection
- B. Small channel spacing
- C. Chromatic dispersion (CD) and polarization mode dispersion
- D. Scattering and absorption
正解：D
解説：
Scattering and absorption are the main reasons for fiber attenuation. Scattering occurs when light bounces off the sides of the fiber, while absorption happens when light is absorbed by the glass or other materials that make up the fiber. Chromatic dispersion (CD) and polarization mode dispersion (PMD) are also factors that can cause attenuation, but they are not the main causes. Small channel spacing can also cause attenuation, but it is a secondary factor and is only significant in certain cases.
質問 # 28
What is a trail?
- A. A physical link between two optical amplifiers
- B. A transparent transport of a client signal
- C. An entity to encapsulate a low order signal into a high order container
- D. A link between end points to increase the power budget of the optical link
正解：B
解説：
A trail is a transparent transport of a client signal. A trail is a physical link between two points in an optical network, allowing for the transport of a client signal from one point to the other. It is a low-order signal, such as a 10G Ethernet or a Fibre Channel signal, encapsulated into a high-order container, such as a 40G or 100G signal. This allows for the transport of the client signal over longer distances, increasing the power budget of the optical link.
質問 # 29
In which window(s) does the attenuation reach its minimum peak?
- A. Both first and second windows
- B. First window (850 nm)
- C. Second window (1300 nm)
- D. Third window (1550 nm)
正解：D
解説：
The third window (1550 nm) is where the attenuation reaches its minimum peak. This is because the materials used in fiber optic cables have minimal absorption in this wavelength range. The first and second windows (850 nm and 1300 nm respectively) have higher attenuation due to the materials used in the fiber optic cables.
質問 # 30
Where can the user set the long-haul WT decoder parameter, when designing a network with EPT?
- A. In the NE parameters
- B. In the optimization parameters
- C. In the network parameters
- D. In the audit menu
正解：A
解説：
The long-haul WT decoder parameter can be set in the NE parameters when designing a network with EPT. This parameter is used to adjust the sensitivity of the decoder and can help to improve the accuracy of the measurements for long-haul WTs.
The Network Element (NE) parameters in EPT (Element Planning Tool) are used to configure various settings and options for the network elements in the network. The long-haul WT decoder parameter is one such setting that can be configured in the NE parameters section. The user can access the NE parameters by navigating to the NE Parameters menu within the EPT interface. The user can then select the appropriate network element and modify the settings as needed. This information can be found in the Nokia guide for EPT.
質問 # 31
Is it possible to select the fiber type independently for each segment while designing a network in EPT?
- A. No, as the fiber type is selected for links only and it's one for whole design
- B. Yes, during the link creation through the wizard
- C. No, a unique type is allowed per design for all segments
- D. Yes, during the segment creation phase or editing
正解：D
解説：
Yes, during the segment creation phase or editing. It is possible to select the fiber type independently for each segment while designing a network in EPT. This can be done during the segment creation phase or when editing an existing segment. This allows for more flexibility when designing the network and allows for more efficient use of resources.
質問 # 32
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