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Nokia 4A0-205 Exam Overview:

Certification Vendor:	Nokia
Exam Name:	Nokia Optical Networking Fundamentals 4A0-205
Exam Number:	4A0-205
Available Languages:	English
Sample Questions:	Nokia 4A0-205 Sample Questions

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Nokia 4A0-205: Nokia Optical Networking Fundamentals exam is an industry-recognized certification that demonstrates a candidate's knowledge and understanding of optical networking. 4A0-205 Exam is designed to test the candidate's understanding of various optical networking concepts, including network design, installation, and maintenance. It is a globally recognized certification that is widely accepted by the industry and is a valuable asset for professionals in the networking field.

Nokia Optical Networking Fundamentals Sample Questions (Q59-Q64):

NEW QUESTION # 59
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. This step is used to measure optical power performances over an existing network before making changes.
C. During this step, the configuration available on the involved network elements is compared with the design provided by EPT.
D. During this step, the run design action is triggered for network design consistency check and errors fixing.

Answer: D

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 # 60
What is the purpose of the NFM-T deploy menu?

A. It is used to import EPT files to deploy the network based on the EPT design.
B. It is used to create new network instances, such as physical connections, infrastructures and services.
C. It is used to deploy new operators (administrator, observers, and so on) to access the platform.
D. It is used to deploy additional shelves to existing SWDM nodes.

Answer: B

Explanation:
The NFM-T (Network Functions Manager - Transport), now part of the WaveSuite Network Operations Center (WS-NOC), is the centralized management system for Nokia's optical portfolio. The Deploy menu is the primary engine for operationalizing the network. Its fundamental purpose is to create and provision new network instances, which encompasses the lifecycle of the transport infrastructure.
Specifically, this menu allows operators to establish physical connections (fiber links between nodes), build out the infrastructure (defining the topology and node roles), and most importantly, provision services (such as ODUk or Optical Channel services). While the EPT (now WaveSuite Planner) designs the network, and those files can be used as a reference, the actual "birth" of a service in the live network-mapping it from the source transponder to the destination through the required ROADM degrees-is executed via the Deploy menu. It translates the high-level intent into specific cross-connect commands sent to the individual Network Elements (NEs), ensuring that the underlying hardware is correctly configured to carry client traffic.

NEW QUESTION # 61
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 optical signal power (including noise) and the optical noise power over a specific spectral bandwidth.
C. 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.
D. The OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth.

Answer: D

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 # 62
Which of the following statements about Wavelength Tracker monitoring points in CDC-F architecture is TRUE?

A. Wavelength Tracker monitoring points are settled on IRDMxx line interfaces and on CWR CLS interfaces.
B. Wavelength Tracker monitoring points are settled on IRDMxx and OTs line interfaces.
C. Wavelength Tracker monitoring points are settled on IRDMxx line interfaces only.
D. Wavelength Tracker monitoring points are settled on ITL mux interfaces and on OTs line interfaces.

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
In a CDC-F (Colorless, Directionless, Contentionless, Flex-grid) architecture, the placement of monitoring points is vital for end-to-end visibility of wavelengths. Nokia's Wavelength Tracker technology relies on these points to detect the unique "keys" or signatures associated with each wavelength. In a CDC-F node, the primary monitoring points are located on the IRDMxx (Intelligent Reconfigurable Demultiplexer/Mux) line interfaces and the CWR (Colorless Wavelength Router) CLS (Colorless) interfaces.
The IRDM monitoring points allow the system to verify the power and presence of wavelengths as they enter or leave the fiber spans (degrees). The CWR CLS monitoring points are critical because they provide visibility at the "Colorless" add/drop stage. By having monitoring at both locations, the WaveSuite Network Operations Center (WS-NOC) can pinpoint exactly where a signal loss or power degradation is occurring-whether it's in the external fiber plant or within the internal colorless switching fabric of the ROADM. This granular visibility is what allows Nokia's "Power Management" to automate balancing across complex mesh topologies.

NEW QUESTION # 63
Which of the following statements best describes the definition of PCT?

A. A tool to validate internal fiber connectivity on CDC-F 2.0 nodes.
B. A tool supporting nodes' automatic provisioning on NFM-T.
C. A tool supporting zero-touch power management on PSS-32 equipment.
D. A tool supporting external links autodiscovery on NFM-T.

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
The Photonic Connectivity Tool (PCT) is a specialized utility within the Nokia 1830 PSS ecosystem designed specifically for modern, complex node architectures. As networks evolved toward CDC-F (Colorless, Directionless, Contentionless with Flex-grid), the internal fiber cabling within a single node became significantly more complex, involving numerous connections between WSS modules, Multicast Switches (MCS), and amplifiers.
The PCT is used to validate internal fiber connectivity, ensuring that the physical "patching" matches the intended design before service provisioning begins. It leverages the OSRP (Optical Signal Routing Protocol) or specialized control plane mechanisms to verify that light can flow through the internal cross-connects as expected. This tool is essential for reducing human error during the installation of high-degree ROADM sites, where dozens of internal fibers must be correctly mapped to ensure the "Directionless" and "Contentionless" features function without blocking.

NEW QUESTION # 64
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