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Nokia 4A0-205 Exam Overview:

Certification Vendor:	Nokia
Exam Name:	Nokia Optical Networking Fundamentals
Exam Number:	4A0-205
Exam Format:	Multiple Choice
Available Languages:	English
Related Certifications:	Nokia Optical Network Services Expert Certification Nokia Certified Optical Network Automation Professional Nokia Optical Network Professional Certification
Real Exam Qty:	40
Exam Price:	$125 USD
Exam Duration:	90 minutes
Sample Questions:	Nokia 4A0-205 Sample Questions
Exam Way:	Pearson VUE testing center or online proctored exam.
Pre Condition:	No mandatory prerequisites.
Official Syllabus URL:	https://www.nokia.com/networks/training/onc/exams/optical-networking-fundamentals/

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The 4A0-205 exam consists of 60 questions, and individuals have 90 minutes to complete it. The questions cover various topics such as the basics of optical networking, optical transport systems, and optical network design. 4A0-205 exam is available in multiple languages to cater to professionals worldwide.

Nokia 4A0-205 exam covers a wide range of topics, including optical networking fundamentals, optical transmission systems, network design and planning, and network operations and maintenance. Candidates are expected to have a deep understanding of optical networking technology and be able to apply that knowledge in real-world scenarios. 4A0-205 Exam consists of multiple-choice questions and practical exercises, and candidates are required to demonstrate their ability to analyze, troubleshoot, and optimize optical networks.

Nokia Optical Networking Fundamentals Sample Questions (Q48-Q53):

NEW QUESTION # 48
A user needs to retrieve the active alarm list from a network element. Which command should be issued through an 1830 PSS CLI?

A. retrieve alarms
B. display alarms
C. show active alarms
D. alm

Answer: D

Explanation:
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
The Nokia 1830 PSS uses a Command Line Interface (CLI) that is distinct from the Nokia SR-OS used in routers. For technicians performing local maintenance or troubleshooting via a serial or SSH connection to the Shelf Controller (EC), the command to view the current status of the network element's alarms is show fault-database or the shorthand alm.
When the alm command is executed, the system displays a table containing all active alarms, their severity (Critical, Major, Minor, or Warning), the timestamp of the occurrence, and the specific object (e.g., a specific port or card) that is reporting the fault. This is the primary method for "Layer 0" local troubleshooting. While management software like WS-NOC provides a Graphical User Interface (GUI) to view these alarms, knowing the CLI command is essential for field operations where a connection to the central management system might not be available. Option B, C, and D are incorrect as they do not follow the specific syntax of the 1830 PSS CLI environment.

NEW QUESTION # 49
What is a Shared Risk Group (SRG)?

A. A set of fibers that share the same latency risk
B. A set of network resources that share a common failure risk
C. A set of boards that share the same failure risk
D. A set of nodes that share a common risk of hardware failure

Answer: B

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 # 50
Which statement is correct about node synchronization?

A. Node synchronization is executed to align the time of the node to the time of the NFM-T platform
B. Full synchronization retrieves the correlated alarms from the node
C. Node synchronization is executed to test the reachability of a node
D. Full synchronization retrieves all items from the node (NE parameters. Ports, Alarms, Internal Links, etc)

Answer: D

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 # 51
What is the main function of an optical amplifier?

A. Compensating for optical power attenuation
B. Compensating for attenuation through an optical-electrical-optical amplification
C. Compensating for chromatic dispersion
D. Demodulating the incoming signal

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
The primary function of an optical amplifier in a WDM system is to provide gain to the optical signal to compensate for optical power attenuation (loss) that occurs as light travels through the optical fiber. As photons travel through kilometers of silica fiber, their energy is absorbed or scattered, leading to a reduction in signal strength. To ensure the signal reaches its destination with sufficient power for the receiver to detect it, amplifiers like the EDFA (Erbium-Doped Fiber Amplifier) or Raman amplifiers are placed at strategic intervals along the fiber span.
It is crucial to distinguish this from Option D; modern optical amplifiers perform purely optical amplification, meaning the signal stays in the photonic domain without being converted to electricity (O-E-O). While some specialized amplifiers (like the RA2P) might interact with other parameters, their fundamental job is power restoration. Furthermore, while amplifiers are essential for a network's reach, they do not compensate for chromatic dispersion-that is the job of Dispersion Compensation Modules (DCM) or electronic dispersion compensation (EDC) in coherent transponders-nor do they demodulate signals, which is the role of the receiver in a transponder.

NEW QUESTION # 52
Which statement is correct about the NFM-T network map?

A. It allows the graphical visualization of the services deployed in the network with the details of the boards involved in the service.
B. It allows context sensitive navigation and represents nodes and related physical connections with different colors. depending on the active alarms.
C. It automatically represents all nodes grouped by the location string assigned during the NE creation.
D. It represents all supervised nodes grouped by alarm status (with a different color).

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 # 53
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