[2023年04月]更新の4A0-205ブレーン問題集で4A0-205問題で最高得点を目指すため今すぐ試そう
4A0-205試験問題集でベスト問題集を無料で試そう4A0-205試験問題
質問 # 16
Which of the following is an example of optical protection mechanism?
- A. GR and SBR combined
- B. OSNCP (e.g., via Y-cable or OPS card)
- C. Optical regeneration (e.g., back-to-back regeneration)
- D. GMPLS-enabled SBR
正解：B
解説：
It can be implemented through the use of a Y-cable or an optical protection switch (OPS) card, which allows for the switching of traffic to a secondary path in the event of a failure on the primary path. This type of protection is commonly used to protect against fiber cuts and other types of physical layer failures in the optical transport network.
質問 # 17
Is it possible to modify node parameters within the edit EPT menu?
- A. No, this view is used to display a close-up view of the node
- 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. Yes, but the user can modify only the node name and location
- D. Yes, the user can apply manual changes directly from this view
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 # 18
Which statement is correct about node synchronization?
- A. Node synchronization is executed to align the time of the node to the time of the NFM-T platform
- B. Full synchronization retrieves all items from the node (NE parameters. Ports, Alarms, Internal Links, etc)
- C. Node synchronization is executed to test the reachability of a node
- D. Full synchronization retrieves the correlated alarms from the node
正解：B
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
Is it possible to open and manage EPT designs that are created with different releases than the release installed on the local workstation?
- A. Only designs created with current and older releases can be opened and edited.
- B. No restrictions are imposed on the software release.
- C. Only designs created with the current release can be opened and edited.
- D. Designs created with an older release can be opened by a current release but cannot make changes.
正解：A
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 # 20
Which of the following sentences about FlexGrid is false?
- A. Channels in FlexGrid systems are allocated with a granularity of 27.5GHz.
- B. FlexGrid systems use specific sets of boards. Old generation WDM systems need to be upgraded to support FlexGrid.
- C. FlexGrid allows a more efficient channel spacing.
- D. The FlexGrid is currently standardized by ITU-T.
正解：B
解説：
FlexGrid is a flexible grid technology that allows for variable channel spacing and bandwidth allocation. It uses the same sets of boards as the traditional fixed grid systems and it does not require upgrading the old generation WDM systems.
Reference:
"Flexible Grid Optical Networks: From Concepts to Realizations" by Diomidis S. Michalopoulos and George K. Karagiannidis
"Flexible Grid and Flexible Spectrum Optical Networks" by Diomidis S. Michalopoulos and George K. Karagiannidis
"Flexible Grid Optical Networks" by Diomidis S. Michalopoulos and George K. Karagiannidis
質問 # 21
When monitoring the quality of the received signal in WDM, an open eye indicates:
- A. Low noise
- B. Presence of high inter-symbolic interference
- C. High jitter
- D. High distortion
正解：A
解説：
An open eye pattern indicates that the signal is not affected by noise, and the received signal is of high quality. This is because an open eye pattern is the result of a signal that is aligned in time, and is not affected by noise or other distortions.
Reference:
"Optical Fiber Communications" by Gerd Keiser
"Fiber-Optic Communications Technology" by Djafar K. Mynbaev
"Optical Communications" by Gerd Keiser
質問 # 22
Which statement is correct about node synchronization?
- A. Node synchronization is executed to align the time of the node to the time of the NFM-T platform
- B. Full synchronization retrieves all items from the node (NE parameters. Ports, Alarms, Internal Links, etc)
- C. Node synchronization is executed to test the reachability of a node
- D. Full synchronization retrieves the correlated alarms from the node
正解：B
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 # 23
What is the purpose of the validate step in the EPT design process?
- A. This step is used to measure optical power performances over an existing network before making changes.
- B. During this step, the configuration available on the involved network elements is compared with the design provided by EPT.
- C. During this step, the run design action is triggered for network design consistency check and errors fixing.
- D. This step is optional and is useful to verify the network element layout before going through the commission step.
正解：C
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
Which statement is correct about the NFM-T network map?
- A. It allows context sensitive navigation and represents nodes and related physical connections with different colors. depending on the active alarms.
- B. It represents all supervised nodes grouped by alarm status (with a different color).
- C. It allows the graphical visualization of the services deployed in the network with the details of the boards involved in the service.
- D. It automatically represents all nodes grouped by the location string assigned during the NE creation.
正解：A
解説：
The NFM-T network map provides a graphical view of the network with different colors used to represent each node, physical connection, and active alarm. It allows the user to quickly identify any issues in the network and provides context sensitive navigation.
質問 # 25
Where can the user set the long-haul WT decoder parameter, when designing a network with EPT?
- A. In the audit menu
- B. In the optimization parameters
- C. In the NE parameters
- D. In the network parameters
正解：C
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 # 26
Which of the following statements is true?
- A. Logs report both active and historical events.
- B. Alarms and conditions report only historical status of the node.
- C. Alarms and conditions report a real time status of the node.
- D. Logs report a real time status of the node.
正解：A
解説：
A log is a record of events that have occurred within a system, such as a network device or an application. Logs can include information about system activity, configuration changes, and error messages. They can be used for troubleshooting, auditing, and compliance purposes. Logs can report both active (real-time) and historical events that have occurred within a system.
Alarms and conditions, on the other hand, are used to notify operators of real-time status of the node, such as when a threshold is breached or when a specific event occurs. Alarms and conditions are typically used to provide real-time notifications of potential problems or issues, while logs are used to provide a historical record of what has occurred.
質問 # 27
WDM allows transmission systems to:
- A. Share a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission
- B. Transport multiple signals transparently, onto several wavelengths, all together over one single fiber
- C. Increase the bit rate of each client signal by spreading it over multiple wavelengths
- 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 # 28
Which of the following applications is related to Wavelength Tracker tool?
- A. Correcting errors related to wavelength inconsistencies
- B. Tracing the end-to-end wavelength optical power
- C. Collecting logs related to possible issue affecting a wavelength path
- D. Tracking the protection path for a specific wavelength
正解：D
解説：
Tracking the protection path for a specific wavelength. The Wavelength Tracker tool is used to track the protection path of a specific wavelength, allowing the user to quickly identify any issues that may arise and take corrective action.
Wavelength Tracker tool is a feature used to monitor and track the protection path for a specific wavelength in an optical network. It can also be used to monitor and verify the working state of the protection path, and to detect and troubleshoot protection switch events. The Wavelength Tracker tool can be used to monitor the protection path for a specific wavelength, and it can also be used to trace the end-to-end path of a wavelength through the network. This tool is typically used by network operators to monitor and troubleshoot wavelength-level issues in the network, such as protection switch events or wavelength-level performance issues.
質問 # 29
What is the metro area network?
- A. The metro area network is located between access and core domains.
- B. The metro area network is made of OCS/SWDM nodes only, as no pure photonic nodes are used here.
- C. The metro area network is that portion of network that passes through a city to provide connections to several customers.
- D. The metro area network is located in between two access area networks and made of photonic nodes only (no OCS/SWDM nodes are used there).
正解：C
解説：
The Metro Area Network (MAN) is a telecommunications network that spans a metropolitan area and connects multiple local area networks (LANs) or business networks together. It typically covers an area that is larger than a LAN but smaller than a wide area network (WAN). The purpose of a MAN is to provide a high-bandwidth, low-latency communication infrastructure for businesses and other organizations in a metropolitan area.
Reference:
Cisco, "Metro Ethernet Services," https://www.cisco.com/c/en/us/solutions/service-provider/metro-ethernet-services/index.html Techopedia, "Metro Area Network (MAN)," https://www.techopedia.com/definition/26896/metro-area-network-man
質問 # 30
Which sentence about NFM-T is correct?
- A. NFM-T is used to design and manage optical network
- B. NFM-T fully supports LO, LI, L2 and GMPLS applications and it is mainly focused on 1830 PSS, as well as other older product families
- C. NFM-T fully supports optical and IP nodes
- D. NFM-T is used to provision optical services having IP nodes as extremities
正解：D
解説：
NFM-T is a network management system designed to manage optical networks in a unified manner. It is used to design, manage, and provision optical services having IP nodes as extremities. It supports a variety of technologies, including optical and IP, and fully supports LO, LI, L2, and GMPLS applications. It is mainly focused on the Nokia 1830 PSS product family, as well as other older product families.
質問 # 31
Is it possible to mix PSS-24x and PSS-8x shelves In an SWDM configuration?
- A. Yes, as both can be equipped within the same node
- B. Yes, but the PSS-8X shelf must be configured as a master
- C. Yes, but the PSS-24X shelf must be configured as a master
- D. No, as they are not compatible and cannot be used within the same node
正解：D
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 # 32
Which application generates the commissioning file(s)?
- A. NFM-T
- B. CPB
- C. EPT
- D. NSP
正解：B
解説：
The CPB (Commissioning Parameter Builder) application is used to generate the commissioning files for a Nokia 1830 Photonic Service Switch (PSS-1). The CPB application allows the user to create multiple commissioning files [1][2], which can be used to configure a variety of different features on the device. The CPB also allows users to view, edit and modify the commissioning files before they are uploaded to the device. The NSP (Network Service Platform) and EPT (Element Provisioning Tool) are used to manage the devices and network elements within the network, but do not generate commissioning files.
質問 # 33
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