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Real Nokia 4A0-205 Exam Dumps with Correct 42 Questions and Answers
The Nokia 4A0-205 exam, also known as Nokia Optical Networking Fundamentals, is a certification exam that focuses on optical networking concepts and technologies. This exam is designed for individuals who want to enhance their understanding of optical networking and gain recognition in the industry. The Nokia 4A0-205 exam covers various topics such as optical networking technologies, optical transmission systems, optical fiber cables, and network planning and operations.
To prepare for the Nokia 4A0-205 exam, candidates may choose to take the Nokia Optical Networking Fundamentals course, which covers all the topics tested in the exam. Alternatively, they may choose to study independently using resources such as textbooks, online tutorials, and practice tests. It is recommended that candidates have a good understanding of networking concepts before taking this exam.
NEW QUESTION # 23
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. Different optical transmission windows correspond to different safety requirements and rules for the related lasers operating with these windows.
- D. These three windows are three different angles of incidence of the light injected by the laser into the fiber.
Answer: B
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 # 24
Is it possible to select the fiber type independently for each segment while designing a network in EPT?
- A. No, a unique type is allowed per design for all segments
- B. Yes, during the segment creation phase or editing
- C. No, as the fiber type is selected for links only and it's one for whole design
- D. Yes, during the link creation through the wizard
Answer: B
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 # 25
What is the purpose of the validate step in the EPT design process?
- A. During this step, the configuration available on the involved network elements is compared with the design provided by EPT.
- B. This step is optional and is useful to verify the network element layout before going through the commission step.
- C. During this step, the run design action is triggered for network design consistency check and errors fixing.
- D. This step is used to measure optical power performances over an existing network before making changes.
Answer: C
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 # 26
Which statement is correct about the NFM-T network map?
- A. It automatically represents all nodes grouped by the location string assigned during the NE creation.
- B. It allows context sensitive navigation and represents nodes and related physical connections with different colors. depending on the active alarms.
- C. It represents all supervised nodes grouped by alarm status (with a different color).
- D. It allows the graphical visualization of the services deployed in the network with the details of the boards involved in the service.
Answer: B
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 # 27
What is the definition of OSNR?
- A. The OSNR is defined as the ratio between the transmitted optical power and the received optical power over 1 km of fiber including both signal and optical noise.
- B. The OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth.
- C. The OSNR is the ratio between the optical output signal power and the optical input signal power of the device being analyzed.
- D. The OSNR is defined as the ratio between the optical signal power (including noise) and the optical noise power over a specific spectral bandwidth.
Answer: B
Explanation:
The OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth. This is also known as the signal-to-noise ratio (SNR), and it is a measure of how much signal is present in the optical signal compared to the noise, usually expressed in decibels (dB).
NEW QUESTION # 28
A user needs to check for interface details against the commands is the correct one?
- A. 11starla 1/17 port-detail
- B. show interface 11starla 1/17/L1 detail
- C. config card 11star1a interface 1/17 detail
- D. config interface detail 1/17/L1
Answer: B
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 # 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 align the time of the node to the time of the NFM-T platform
- D. Node synchronization is executed to test the reachability of a node
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
Which application generates the commissioning file(s)?
- A. CPB
- B. NSP
- C. EPT
- 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 # 31
Which sentence about NFM-T is correct?
- A. NFM-T is used to provision optical services having IP nodes as extremities
- B. NFM-T fully supports optical and IP nodes
- C. NFM-T is used to design and manage optical network
- D. 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
Answer: A
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
Which macro steps can be executed via CPB?
- A. Power adjustment and generation of the system loss report
- B. Systems validation, system provisioning, power adjustment
- C. Node supervision, system validation and system provision
- D. Node creation, systems validation and system provisioning
Answer: D
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 # 33
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 nodes that share a common risk of hardware failure
- D. A set of fibers that share the same latency risk
Answer: A
Explanation:
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.
NEW QUESTION # 34
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. The FlexGrid is currently standardized by ITU-T.
- C. FlexGrid allows a more efficient channel spacing.
- D. Channels in FlexGrid systems are allocated with a granularity of 27.5GHz.
Answer: A
Explanation:
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
NEW QUESTION # 35
What is a trail?
- A. A transparent transport of a client signal
- B. An entity to encapsulate a low order signal into a high order container
- C. A link between end points to increase the power budget of the optical link
- D. A physical link between two optical amplifiers
Answer: A
Explanation:
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.
NEW QUESTION # 36
WDM allows transmission systems to:
- A. Increase the bit rate of each client signal by spreading it over multiple wavelengths
- B. Allocate different signals to different time slots
- C. Transport multiple signals transparently, onto several wavelengths, all together over one single fiber
- D. Share a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission
Answer: C
Explanation:
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.
NEW QUESTION # 37
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 network parameters
- C. In the optimization parameters
- D. In the NE parameters
Answer: D
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 # 38
Which of the following statements is true?
- A. Alarms and conditions report only historical status of the node.
- B. Alarms and conditions report a real time status of the node.
- C. Logs report a real time status of the node.
- D. Logs report both active and historical events.
Answer: D
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 # 39
Which mechanisms can be put in place to increase network survivability?
- A. Protection, where backup resources are allocated upon failure; or restoration, where each trail can be recovered thanks to a 1+1 protection mechanism
- B. Protection, where backup resources are pre-allocated and reserved; or restoration, where backup resources are allocated upon failure.
- C. Protection, where backup resources are allocated upon failure; or restoration, where backup resources are pre-allocated and reserved
- D. Protection, where backup resources are pre-allocated and reserved; or restoration, where each trail can be recovered thanks to a 1+1 protection mechanism
Answer: B
Explanation:
There are two main mechanisms that can be put in place to increase network survivability: protection and restoration. Protection involves pre-allocating and reserving backup resources so that they are ready in case of a failure. Restoration involves allocating backup resources upon failure and using a 1+1 protection mechanism to recover each trail. This ensures that the network is able to re-route traffic in the event of a failure, increasing the overall survivability of the network.
NEW QUESTION # 40
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