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Nokia 4A0-205 exam is divided into three main sections, each of which covers a specific area of optical networking. The first section covers the fundamentals of optical networking, including the concept of light and its properties, optical transmission systems, and optical components. The second section covers the design and planning of optical networks, including the selection of network components, network topology, and network architecture. The final section covers the operation and maintenance of optical networks, including network performance monitoring, troubleshooting, and repair.

Nokia 4A0-205 Exam Syllabus Topics:

Topic	Details
Topic 1	EPT interface and terminology Levels and topologies Network commissioning steps
Topic 2	Basics of the Network Management System Introduction to WDM networks
Topic 3	SWDM-based optical network management SWDM alarms, conditions, logs, and PMs
Topic 4	OTN hierarchy, trails, and services switching Network creation, analysis, and reporting
Topic 5	SWDM (photonic and switched) nodes SWDM nodes supervision on NFM-T

Nokia 4A0-205 Exam is a computer-based test, and it contains 60 multiple-choice questions. 4A0-205 exam duration is 90 minutes, and the passing score is 80%. The questions are designed to test the candidate's understanding of optical networking fundamentals, including transmission principles, optical networking concepts, and network architectures. 4A0-205 exam also covers equipment and technology, including optical fiber, optical amplifiers, and optical switches.

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Nokia Optical Networking Fundamentals Sample Questions (Q54-Q59):

NEW QUESTION # 54
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 current and older releases 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 the current release can be opened and edited.

Answer: A

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 # 55
How many PM bins can be stored, for each data collection point, on PSS systems?

A. 120 x 15-min bins, 60 x 1-day bins and 1 raw bin.
B. 4 x 15-min bins and 1 x 1-day bin.
C. 200 x 15-min bins, 90 x 1-day bins and 1 raw bin.
D. 33 x 15-min bins, 8 x 1-day bins and 1 raw bin.

Answer: D

Explanation:
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
Performance Monitoring (PM) is critical for maintaining the health of a Nokia 1830 PSS network. The system collects data such as FEC corrected bits, optical power levels, and ODU-layer errors. According to Nokia's standard node management architecture, each data collection point (such as an optical port or an ODU termination point) stores a specific number of historical "bins" locally on the card or the shelf controller.
The standard storage capacity for these PM statistics is 33 x 15-minute bins (covering the last 8 hours and 15 minutes of granular data) and 8 x 1-day bins (covering the last week of daily totals). Additionally, there is 1 raw bin which contains the "current" accumulating data that has not yet been shifted into a completed 15-minute or 24-hour historical bin. This allows network operators using WS-NOC (WaveSuite Network Operations Center) to retrieve recent historical performance data directly from the NE (Network Element) even if the management system was temporarily disconnected. If longer-term history is required, the management system must be configured to poll and archive these bins into its own database before they are overwritten on the hardware.

NEW QUESTION # 56
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 pump light travels in the same direction of the signal, amplifying it while it flows in the fiber towards the following node.
C. The pump light travels in the opposite direction of the signal to be amplified, amplifying it while it arrives from the adjacent node.
D. The amplification is done simultaneously for all channels as they enter the board.

Answer: C

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 # 57
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 # 58
Which of the following is NOT a troubleshooting functionality of the Wavelength Tracker?

A. Tracing a service along an optical path.
B. Detecting unexpected or missing channels.
C. Performing channel power monitoring.
D. Testing a node's internal fiber connectivity before service provisioning.

Answer: D

Explanation:
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
The Nokia Wavelength Tracker is a unique and powerful technology used within the 1830 PSS portfolio to provide "layer 0" visibility. It works by embedding unique optical signatures (keys) onto each wavelength at the source (transponder). These signatures allow the system to identify and monitor individual channels as they traverse the optical network without the need for expensive Optical Spectrum Analyzers (OSAs) at every site.
Specifically, the Wavelength Tracker enables tracing a service along its path by identifying these unique keys at various monitoring points. It also excels at channel power monitoring, as it can measure the power level of each specific wavelength independently. Furthermore, it is instrumental in detecting unexpected or missing channels (ghost signals or misrouting) by comparing the detected keys against the expected provisioning data in the management system. However, it is not used for testing a node's internal fiber connectivity before service provisioning. Internal fiber connectivity is typically verified during the commissioning phase using the Commissioning and Power Balancing (CPB) tool within WS-NOC or through manual physical inspection and "fiber-it" procedures. Wavelength Tracker requires an active, keyed optical signal to function, which generally exists only during or after the service provisioning stage.

NEW QUESTION # 59
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