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NEW QUESTION # 23
A user needs to check for interface details against the commands is the correct one?
- A. config interface detail 1/17/L1
- B. config card 11star1a interface 1/17 detail
- C. 11starla 1/17 port-detail
- D. show interface 11starla 1/17/L1 detail
Answer: D
Explanation:
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.
NEW QUESTION # 24
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 (common Ethernet port) used to connect one or more client ports (e.g., 1Gb/s or legacy 100Mbit/s client flows)
- C. It is an RJ-45 interface (a common Ethernet port) that has to be configured with an IP address for node reachability and management
- D. It is an RJ-45 interface (a common Ethernet port) used for cascading 1830 PSS nodes (e.g., external shelves)
Answer: C
Explanation:
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.
NEW QUESTION # 25
Which of the following are the main reasons for fiber attenuation?
- A. Chromatic dispersion (CD) and polarization mode dispersion
- B. Small channel spacing
- C. Scattering and absorption
- D. Refraction and reflection
Answer: C
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 # 26
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 # 27
What is the function of a pre-amplifier in an optical network?
- A. Through the pre-amplifier, the optical signal is amplified both the receiver side and at the transmitter side.
- B. Through the pre-amplifier, the optical signal is amplified at the receiver side after it travels along the fiber from another node.
- C. Through the pre-amplifier, the optical signal is amplified at the transmitter side before it is sent to the line span.
- D. Through the pre-amplifier, the optical signal is amplified within the node internally to recover internal losses due, for instance, to cascaded filters.
Answer: C
Explanation:
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.
NEW QUESTION # 28
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. No, as the fiber type is selected for links only and it's one for whole design
- C. Yes, during the link creation through the wizard
- 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 # 29
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 test the reachability of a node
- D. Node synchronization is executed to align the time of the node to the time of the NFM-T platform
Answer: A
Explanation:
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.
NEW QUESTION # 30
With reference to the image, where is the OPS card placed to provide the OMSP protection?
- A. Before the transponder, on the client side, towards the external device
- B. After the amplifiers
- C. Between the transponders and the mux/demux
- D. Between the mux/demux and the amplifier
Answer: A
NEW QUESTION # 31
Which sentence about NFM-T is correct?
- A. NFM-T is used to design and manage optical network
- B. NFM-T fully supports optical and IP nodes
- C. 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
- D. NFM-T is used to provision optical services having IP nodes as extremities
Answer: D
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 # 32
In which window(s) does the attenuation reach its minimum peak?
- A. First window (850 nm)
- B. Second window (1300 nm)
- C. Both first and second windows
- D. Third window (1550 nm)
Answer: D
Explanation:
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.
NEW QUESTION # 33
Which of the following statements is true about chromatic dispersion (CD)?
- A. The fiber attenuation introduces inter-channel interference.
- B. The fiber attenuation changes along the fiber, and when the light crosses these differences the CD takes place.
- C. Different wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed.
- D. Different channels have different bandwidth and this causes different CD performances.
Answer: C
Explanation:
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.
NEW QUESTION # 34
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 NE parameters
- C. In the optimization parameters
- D. In the network 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 # 35
Which of the following statements is true?
- A. Alarms and conditions report only historical status of the node.
- B. Logs report a real time status of the node.
- C. Logs report both active and historical events.
- D. Alarms and conditions report a real time status of the node.
Answer: C
Explanation:
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.
NEW QUESTION # 36
What is the meaning of first, second, and third window in the optical fiber propagation context?
- A. These three windows are three different angles of incidence of the light injected by the laser into the fiber.
- B. Different optical transmission windows correspond to different safety requirements and rules for the related lasers operating with these windows.
- C. These windows are three different wavelength intervals where the WDM optical transmission occurs.
- D. These windows correspond to three different minimum and maximum optical power levels used for optical transmission.
Answer: C
Explanation:
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
NEW QUESTION # 37
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 test the reachability of a node
- D. Node synchronization is executed to align the time of the node to the time of the NFM-T platform
Answer: A
Explanation:
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.
NEW QUESTION # 38
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. It depends, the user is prompted to choose whether to delete or leave the previously designed elements.
- C. Not the design is always progressive, on top of the previous design.
- 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.
Answer: B
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 # 39
What does it take to get connected to the NSP platform?
- A. A browser, the NSP IP address, and the credentials to access the web-based interface (WebUI).
- B. The NSP package should be downloaded from the Nokia website and properly licensed for the specific workstation to be used.
- C. A browser and the NSP IP address; and from the landing page, the NSP application should be downloaded and launched.
- D. 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.
Answer: A
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 # 40
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Nokia 4A0-205 certification exam is designed for professionals with experience in optical networking. 4A0-205 exam is intended for professionals who have a deep understanding of the principles of optical networking and have experience working with optical networking equipment. Professionals who are interested in taking the Nokia 4A0-205 certification exam should have a solid understanding of networking concepts, network design principles, and network troubleshooting techniques.
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