[Nov-2023] 4A0-205 PDF Dumps Extremely Quick Way Of Preparation
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NEW QUESTION # 23
Is it possible to mix PSS-24x and PSS-8x shelves In an SWDM configuration?
- A. No, as they are not compatible and cannot be used within the same node
- B. Yes, but the PSS-24X shelf must be configured as a master
- C. Yes, but the PSS-8X shelf must be configured as a master
- D. Yes, as both can be equipped within the same node
Answer: A
Explanation:
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.
NEW QUESTION # 24
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 # 25
When monitoring the quality of the received signal in WDM, an open eye indicates:
- A. High distortion
- B. Presence of high inter-symbolic interference
- C. Low noise
- D. High jitter
Answer: C
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 # 26
What is the definition of OSNR?
- A. The OSNR is the ratio between the optical output signal power and the optical input signal power of the device being analyzed.
- 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 defined as the ratio between the optical signal power (including noise) and the optical noise power over a specific spectral bandwidth.
- D. 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.
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 # 27
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
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 # 28
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 # 29
How are the EPT systems related to NFM-T when CPB is performed?
- A. The systems are not reported on CPB, as this Is transparent to the user and the whole network is validated and provisioned in one step
- B. The systems are not reported on CPB, but only through the Equipment Manager
- C. The systems are displayed on the CPB panel, however they cannot be individually selected as they need to run all together
- D. The systems are displayed on the CPB panel and they can be individually selected
Answer: D
Explanation:
The EPT systems are displayed on the CPB (Commissioning Parameter Builder) panel and they can be individually selected. This allows the user to configure the network elements in the network and provision them according to their specific requirements. The systems are not reported on CPB, but through the Equipment Manager. The Equipment Manager is the interface used to configure the network elements and the EPT systems. The NFM-T is not related to the CPB and does not affect the CPB process.
NEW QUESTION # 30
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 # 31
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 # 32
Which of the following applications is related to Wavelength Tracker tool?
- A. Collecting logs related to possible issue affecting a wavelength path
- B. Tracing the end-to-end wavelength optical power
- C. Correcting errors related to wavelength inconsistencies
- D. Tracking the protection path for a specific wavelength
Answer: D
Explanation:
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.
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 NFM-T level to be written into the node database (download).
- C. The partial or full node synchronization allows several entities/items defined at node level to be retrieved into the NFM-T database (upload).
- D. 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).
Answer: B
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
Which use case is most suitable for the deployment of a star topology?
- A. Backbone networks, for supporting protection routes
- B. ASON networks, to protect traffic via GMPL5 protocols
- C. Access networks, for collecting traffic towards the main central node
- D. SNCP-protected links
Answer: C
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 # 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
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 # 37
How does a Raman pump work in the 1830 specific implementation?
- A. The amplification is done simultaneously for all channels as they enter the board.
- B. The pump light travels in the same direction of the signal, amplifying it while it flows in the fiber towards the following node.
- C. As the incoming signal power increase, the gain of the amplifier is reduced.
- D. The pump light travels in the opposite direction of the signal to be amplified, amplifying it while it arrives from the adjacent node.
Answer: D
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 # 38
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 # 39
How is it possible to check the activation status of GMRE on a node?
- A. The ControlPlane status column on the node list displays the GMRE status for the selected node
- B. The GMRE activation status is reported in the supervision state column on the node list
- C. The GMRE activation status is reflected on the color of the icon representing the node
- D. The GMRE reachability can be tested via ping request from NFM-T
Answer: B
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 # 40
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