[2023年11月11日] 手に入れよう！最新4A0-205認定された有効な試験問題集解答
100%合格率保証付きの素晴らしい4A0-205試験問題PDF
Nokia 4A0-205試験は、特に通信業界で働いている人々の光ネットワークに関する知識やスキルを向上させたい人々に最適です。この認定試験は、ネットワークエンジニア、技術サポートプロフェッショナル、そして光ネットワークに関するスキルを検証したいネットワークデザイナーにも適しています。この試験はベンダー中立であり、グローバルに認められているため、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認証資格となります。
質問 # 13
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 # 14
With reference to the image, where is the OPS card placed to provide the OMSP protection?
- A. Between the mux/demux and the amplifier
- B. Between the transponders and the mux/demux
- C. Before the transponder, on the client side, towards the external device
- D. After the amplifiers
正解：C
質問 # 15
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 # 16
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 # 17
Which of the following applications is related to Wavelength Tracker tool?
- A. Correcting errors related to wavelength inconsistencies
- B. Collecting logs related to possible issue affecting a wavelength path
- C. Tracking the protection path for a specific wavelength
- D. Tracing the end-to-end wavelength optical power
正解：C
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 # 18
What is the function of a pre-amplifier in an optical network?
- A. Through the pre-amplifier, the optical signal is amplified at the transmitter side before it is sent to the line span.
- B. Through the pre-amplifier, the optical signal is amplified within the node internally to recover internal losses due, for instance, to cascaded filters.
- C. Through the pre-amplifier, the optical signal is amplified both the receiver side and at the transmitter side.
- D. Through the pre-amplifier, the optical signal is amplified at the receiver side after it travels along the fiber from another node.
正解：A
解説：
A pre-amplifier is an optical amplifier that is used to boost the power of the received optical signal before it is detected by the receiver in an optical communication system. This is done to overcome the loss of power that occurs as the signal travels through the optical fiber and to ensure that the receiver can detect the signal. The pre-amplification stage is typically located close to the receiver in order to minimize the distance that the signal has to travel between the amplifier and the receiver, which helps to reduce the noise and distortion in the signal.
質問 # 19
What is the purpose of the validate step in the EPT design process?
- A. During this step, the run design action is triggered for network design consistency check and errors fixing.
- B. This step is optional and is useful to verify the network element layout before going through the commission step.
- 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：A
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 # 20
What is the OAMP LAN interface?
- A. It is an RJ-45 interface (a common Ethernet port) used for cascading 1830 PSS nodes (e.g., external shelves)
- 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 to export active alarms to an external device, typically equipped with several LEDs
- 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 # 21
WDM allows transmission systems to:
- A. Allocate different signals to different time slots
- B. Share a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission
- C. Increase the bit rate of each client signal by spreading it over multiple wavelengths
- D. Transport multiple signals transparently, onto several wavelengths, all together over one single fiber
正解：D
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 # 22
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 # 23
How does a Raman pump work in the 1830 specific implementation?
- A. As the incoming signal power increase, the gain of the amplifier is reduced.
- B. The amplification is done simultaneously for all channels as they enter the board.
- C. The pump light travels in the same direction of the signal, amplifying it while it flows in the fiber towards the following node.
- D. The pump light travels in the opposite direction of the signal to be amplified, amplifying it while it arrives from the adjacent node.
正解：D
解説：
In Raman amplification, a pump laser is used to excite the Raman-active molecules in the fiber, which then amplifies the signal light as it travels in the opposite direction. In the 1830 specific implementation, the pump laser is typically a high-power laser that is launched into the fiber in the opposite direction to the signal. The pump light interacts with the Raman-active molecules in the fiber, which then amplifies the signal light as it travels in the opposite direction. This allows the Raman pump to provide a gain that increases with distance, which can be used to compensate for the loss of signal power as it travels through the fiber.
質問 # 24
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. Trails are transported over services; that is, trails are clients with respect to services.
- C. A service is always associated to a single wavelength, while a trail can involve multiple wavelengths.
- 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 # 25
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 the current release can be opened and edited.
- B. No restrictions are imposed on the software release.
- C. Designs created with an older release can be opened by a current release but cannot make changes.
- D. Only designs created with current and older releases can be opened and edited.
正解：D
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 # 26
Which of the following are the main reasons for fiber attenuation?
- A. Chromatic dispersion (CD) and polarization mode dispersion
- B. Scattering and absorption
- C. Small channel spacing
- D. Refraction and reflection
正解：B
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 # 27
What is a degree-1 node?
- A. A node with only one express channel and therefore made of two sides
- B. A node with only east and west sides without directions towards north and south
- C. A node with only one direction and therefore a terminal node
- D. A node with one direction only and therefore used as In-Line-Amplifier (ILA)
正解：C
解説：
A degree-1 node is a node that only has one direction, and it is therefore a terminal node. This means that the node only has one input and one output port. It does not have any other ports to connect to other nodes or fibers. This is a common feature of some optical transport networks, such as ring networks, where a degree-1 node serves as the endpoint of the ring.
質問 # 28
Which of the following statements is true about chromatic dispersion (CD)?
- A. The fiber attenuation changes along the fiber, and when the light crosses these differences the CD takes place.
- B. The fiber attenuation introduces inter-channel interference.
- C. Different channels have different bandwidth and this causes different CD performances.
- D. Different wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed.
正解：D
解説：
Different wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed. This phenomenon is known as chromatic dispersion and causes light to spread out as it travels through the fiber over distance, leading to signal attenuation and distortion. The fiber attenuation does not introduce inter-channel interference, but it can cause attenuation of the signal. Different channels have different bandwidths, but this does not affect CD performance.
質問 # 29
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 # 30
......
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おり、光伝送の原理、光ネットワークアーキテクチャ、光ネットワークの設計と実装などが含まれます。また、ソフトウェア定義ネットワーキング（SDN）やネットワーク機能仮想化（NFV）など、最新の傾向や開発もカバーしています。
無料4A0-205別格な問題集をダウンロード：https://www.jpntest.com/shiken/4A0-205-mondaishu
4A0-205問題集で2023年最新のNokia試験問題：https://drive.google.com/open?id=15wzVC5PcHnFhgkkXE2kKI76Cd1BnNWeH