[2023年12月19日] 365日更新、有効な4A0-205知能問題集
ベスト品質の4A0-205試験問題集でNokiaテスト高得点を目指そう
Nokia 4A0-205試験は、60の質問で構成される複数選択試験です。試験を完了するのに90分かかります。この試験は、英語、日本語、中国語で利用できます。試験料は125ドルで、世界中のピアソンビューテストセンターで試験を受けることができます。
Nokia 4A0-205試験では、光伝送システム、波長分割多重化（WDM）、光ファイバー技術など、光学ネットワーキングに関連するさまざまなトピックに焦点を当てています。この試験は、候補者が光学ネットワーキングの原則についての理解と、この知識を実際のシナリオに適用する能力をテストするように設計されています。この試験に合格すると、光学ネットワーキングに関する候補者の専門知識が検証され、通信業界でのキャリアを向上させることができます。
質問 # 13
Which of the following sentences about FlexGrid is false?
- A. FlexGrid systems use specific sets of boards. Old generation WDM systems need to be upgraded to support FlexGrid.
- B. Channels in FlexGrid systems are allocated with a granularity of 27.5GHz.
- C. The FlexGrid is currently standardized by ITU-T.
- D. FlexGrid allows a more efficient channel spacing.
正解：A
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 # 14
What is a trail?
- A. A link between end points to increase the power budget of the optical link
- B. A transparent transport of a client signal
- C. An entity to encapsulate a low order signal into a high order container
- D. A physical link between two optical amplifiers
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 # 15
Which macro steps can be executed via CPB?
- A. Node creation, systems validation and system provisioning
- B. Power adjustment and generation of the system loss report
- C. Systems validation, system provisioning, power adjustment
- D. Node supervision, system validation and system provision
正解：A
解説：
Node creation, systems validation and system provisioning. The CPB (Commissioning Parameter Builder) application is used to generate commissioning files for a Nokia 1830 Photonic Service Switch (PSS-1) and can be used to create new nodes, validate the system configuration, and provision the system with the appropriate settings and parameters. Power adjustment and generation of system loss report are not related to CPB.
質問 # 16
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 # 17
Where is the OPS card equipped to provide the optical channel protection?
- A. Before the transponder, on the client side, towards the external device
- B. Between the transponder and the filter
- C. Between the filters and the amplifiers
- D. Between the transponder and the amplifiers
正解：D
解説：
According to the Nokia's 1830 Photonic Service Switch (PSS) product documentation, the Optical Protection Switching (OPS) card is equipped in the transponder and is responsible for providing optical channel protection between the transponder and the amplifiers. The OPS card monitors the optical signal and switches to a pre-configured protection path in case of signal degradation or loss.
質問 # 18
What is a Shared Risk Group (SRG)?
- A. A set of network resources that share a common failure risk
- B. A set of boards that share the same failure risk
- C. A set of fibers that share the same latency risk
- D. A set of nodes that share a common risk of hardware failure
正解：A
解説：
According to the Nokia Optical Networking documentation, a Shared Risk Group (SRG) is defined as "a set of network resources that share a common failure risk. When a resource in an SRG fails, the other resources in the group are also affected." This can include fibers, boards, nodes, and other network resources. The SRG concept is used in network design and protection mechanisms to ensure survivability and minimal impact on service in case of a failure.
質問 # 19
Is it possible to select the fiber type independently for each segment while designing a network in EPT?
- A. Yes, during the segment creation phase or editing
- B. Yes, during the link creation through the wizard
- C. No, a unique type is allowed per design for all segments
- D. No, as the fiber type is selected for links only and it's one for whole design
正解：A
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 # 20
Which of the following is an example of optical protection mechanism?
- A. OSNCP (e.g., via Y-cable or OPS card)
- B. Optical regeneration (e.g., back-to-back regeneration)
- C. GMPLS-enabled SBR
- D. GR and SBR combined
正解：A
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 # 21
A user needs to check for interface details against the commands is the correct one?
- A. show interface 11starla 1/17/L1 detail
- B. config interface detail 1/17/L1
- C. 11starla 1/17 port-detail
- D. config card 11star1a interface 1/17 detail
正解：A
解説：
show interface 11starla 1/17/L1 detail is the correct command to check for interface details. This command will display detailed information about the specified interface, including its status, configuration, and statistics.
質問 # 22
Is it possible to mix PSS-24x and PSS-8x shelves In an SWDM configuration?
- A. Yes, but the PSS-24X shelf must be configured as a master
- B. Yes, as both can be equipped within the same node
- C. Yes, but the PSS-8X 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 # 23
A user needs to check for interface details against the commands is the correct one?
- A. show interface 11starla 1/17/L1 detail
- B. config interface detail 1/17/L1
- C. 11starla 1/17 port-detail
- D. config card 11star1a interface 1/17 detail
正解：A
解説：
show interface 11starla 1/17/L1 detail is the correct command to check for interface details. This command will display detailed information about the specified interface, including its status, configuration, and statistics.
質問 # 24
What is the meaning of first, second, and third window in the optical fiber propagation context?
- A. These windows correspond to three different minimum and maximum optical power levels used for optical transmission.
- B. These windows are three different wavelength intervals where the WDM optical transmission occurs.
- C. These three windows are three different angles of incidence of the light injected by the laser into the fiber.
- D. Different optical transmission windows correspond to different safety requirements and rules for the related lasers operating with these windows.
正解：B
解説：
In optical fiber propagation context, the first, second, and third window refer to different wavelength intervals where the WDM (Wavelength Division Multiplexing) optical transmission occurs.
The first window is the lowest loss window and is typically in the range of 1300-1324nm. This is the most commonly used window for long-haul communications.
The second window is the 1550 nm window and is the most widely used window for long-haul and ultra-long-haul communications. This window has a lower attenuation than the first window, but it also has more dispersion, which can limit the maximum transmission distance.
The third window is the range of 1625-1675 nm, it is also called the L-band window. This window has lower attenuation than the first and second window but its usage is limited due to the high cost of equipment and lack of commercial devices.
These windows are used in WDM systems to increase the capacity of the fiber by transmitting multiple channels of data at different wavelengths on the same fiber.
A,C,D are not correct as they are not related to the meaning of first, second, and third window in the optical fiber propagation context.
Reference:
Nokia Optical Networking Fundamentals, Nokia Press (ISBN:978-1-4822-8109-4)
https://www.nokia.com/networks/solutions/optical-networking/
https://en.wikipedia.org/wiki/Wavelength-division_multiplexing
質問 # 25
By using the EPT run design command, are the previously designed elements removed?
- A. Not the design is always progressive, on top of the previous design.
- B. 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).
- C. It depends, the user is prompted to choose whether to delete or leave the previously designed elements.
- D. 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.
正解：C
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
In which window(s) does the attenuation reach its minimum peak?
- A. Second window (1300 nm)
- B. Both first and second windows
- C. First window (850 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 # 27
Which application generates the commissioning file(s)?
- A. CPB
- B. NSP
- C. NFM-T
- D. EPT
正解：A
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 # 28
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Nokia 4A0-205 試験は、光ネットワークに関連する広範なトピックをカバーしています。光伝送システムの基礎、光ネットワークの設計と計画、ファイバーオプティクス、およびネットワーク管理を含みます。この認証試験に合格した候補者は、光ネットワークの原則を包括的に理解し、光ネットワークを効果的に設計、実装、および管理することができます。さらに、Nokia 光ネットワーキングファンダメンタルズ 認証は、他の多くの Nokia 認証の前提条件となっており、光ネットワークの分野でキャリアアップを目指すプロフェッショナルにとって、貴重な資産となります。
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