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The Nokia 4A0-205 exam is a vital certification for professionals in the field of optical networking. This exam covers a range of topics related to optical networks, including technologies, protocols, and deployment scenarios. Professionals who pass this exam demonstrate their expertise in the field and can take on a range of roles in the industry. This certification is recognized across the industry and is an essential step for anyone looking to advance their career in optical networking.
NEW QUESTION # 19
Which statement is correct about the NFM-T network map?
- A. It allows the graphical visualization of the services deployed in the network with the details of the boards involved in the service.
- B. It represents all supervised nodes grouped by alarm status (with a different color).
- C. It automatically represents all nodes grouped by the location string assigned during the NE creation.
- D. It allows context sensitive navigation and represents nodes and related physical connections with different colors. depending on the active alarms.
Answer: D
Explanation:
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.
NEW QUESTION # 20
Is it possible to open and manage EPT designs that are created with different releases than the release installed on the local workstation?
- A. No restrictions are imposed on the software release.
- B. Designs created with an older release can be opened by a current release but cannot make changes.
- C. Only designs created with the current release can be opened and edited.
- D. Only designs created with current and older releases can be opened and edited.
Answer: D
Explanation:
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.
NEW QUESTION # 21
When monitoring the quality of the received signal in WDM, an open eye indicates:
- A. Low noise
- B. High distortion
- C. Presence of high inter-symbolic interference
- D. High jitter
Answer: A
Explanation:
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
NEW QUESTION # 22
What is a degree-1 node?
- A. A node with one direction only and therefore used as In-Line-Amplifier (ILA)
- B. A node with only one express channel and therefore made of two sides
- C. A node with only east and west sides without directions towards north and south
- D. A node with only one direction and therefore a terminal node
Answer: D
Explanation:
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.
NEW QUESTION # 23
Which of the following are the main reasons for fiber attenuation?
- A. Refraction and reflection
- B. Chromatic dispersion (CD) and polarization mode dispersion
- C. Small channel spacing
- D. Scattering and absorption
Answer: D
Explanation:
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.
NEW QUESTION # 24
Where can the user set the long-haul WT decoder parameter, when designing a network with EPT?
- A. In the network parameters
- B. In the NE parameters
- C. In the audit menu
- D. In the optimization parameters
Answer: B
Explanation:
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.
NEW QUESTION # 25
Which application generates the commissioning file(s)?
- A. CPB
- B. EPT
- C. NSP
- D. NFM-T
Answer: A
Explanation:
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.
NEW QUESTION # 26
What does it take to get connected to the NSP platform?
- A. The NSP package should be downloaded from the Nokia website and properly licensed for the specific workstation to be used.
- B. A browser and the NSP IP address; and from the landing page, the NSP application should be downloaded and launched.
- C. 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.
- D. A browser, the NSP IP address, and the credentials to access the web-based interface (WebUI).
Answer: D
Explanation:
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.
NEW QUESTION # 27
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
Answer: A
Explanation:
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.
NEW QUESTION # 28
By using the EPT run design command, are the previously designed elements removed?
- A. It depends, the user is prompted to choose whether to delete or leave the previously designed elements.
- B. Not the design is always progressive, on top of the previous design.
- C. 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.
- D. 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).
Answer: A
Explanation:
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).
NEW QUESTION # 29
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, as the fiber type is selected for links only and it's one for whole design
- D. No, a unique type is allowed per design for all segments
Answer: A
Explanation:
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.
NEW QUESTION # 30
Which use case is most suitable for the deployment of a star topology?
- A. Backbone networks, for supporting protection routes
- B. Access networks, for collecting traffic towards the main central node
- C. SNCP-protected links
- D. ASON networks, to protect traffic via GMPL5 protocols
Answer: B
Explanation:
A star topology is a network design where all devices are connected to a central hub, which acts as a central point of control and management for the network. This type of topology is commonly used in access networks, where a central node is used to aggregate traffic from multiple users or devices, and then forward it to the core network. This design allows for efficient use of resources and easy management of the network.
Reference:
"Computer Networking: A Top-Down Approach" by James Kurose and Keith Ross (Chapter 3)
"Data Communications and Networking" by Behrouz A. Forouzan (Chapter 2)
NEW QUESTION # 31
How is it possible to check the activation status of GMRE on a node?
- A. The GMRE activation status is reflected on the color of the icon representing the node
- B. The GMRE reachability can be tested via ping request from NFM-T
- C. The GMRE activation status is reported in the supervision state column on the node list
- D. The ControlPlane status column on the node list displays the GMRE status for the selected node
Answer: C
Explanation:
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.
NEW QUESTION # 32
Which sentence about NFM-T is correct?
- A. 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
- B. NFM-T fully supports optical and IP nodes
- C. NFM-T is used to provision optical services having IP nodes as extremities
- D. NFM-T is used to design and manage optical network
Answer: C
Explanation:
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.
NEW QUESTION # 33
What is the purpose of the NFM-T node synchronization?
- A. The partial or full node synchronization allows several entities/items defined at NFM-T level to be exported into an XML file, to be used as input for EPT (download to design).
- B. The partial or full node synchronization allows several entities/items defined at EPT level to be retrieved into the NFM-T database (upload from design).
- C. The partial or full node synchronization allows several entities/items defined at NFM-T level to be written into the node database (download).
- D. The partial or full node synchronization allows several entities/items defined at node level to be retrieved into the NFM-T database (upload).
Answer: C
Explanation:
This is done in order to keep the NFM-T database in sync with the nodes in the network. The synchronization process allows the NFM-T to keep track of any changes that are made to the nodes, such as new nodes added, nodes removed, and so on. By synchronizing the node database with the NFM-T, network administrators can ensure that their network is up to date and running efficiently.
NEW QUESTION # 34
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.
Answer: B
Explanation:
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.
NEW QUESTION # 35
How does a Raman pump work in the 1830 specific implementation?
- A. The pump light travels in the same direction of the signal, amplifying it while it flows in the fiber towards the following node.
- B. The pump light travels in the opposite direction of the signal to be amplified, amplifying it while it arrives from the adjacent node.
- C. The amplification is done simultaneously for all channels as they enter the board.
- D. As the incoming signal power increase, the gain of the amplifier is reduced.
Answer: B
Explanation:
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.
NEW QUESTION # 36
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