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Nokia Optical Networking Fundamentals Sample Questions (Q23-Q28):

NEW QUESTION # 23
Which statement is correct about the NFM-T network map?

A. It represents all supervised nodes grouped by alarm status (with a different color).
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 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 # 24
Is it possible to open and manage EPT designs that are created with different releases than the release installed on the local workstation?

A. Designs created with an older release can be opened by a current release but cannot make changes.
B. Only designs created with current and older releases can be opened and edited.
C. No restrictions are imposed on the software release.
D. Only designs created with the current release can be opened and edited.

Answer: B

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 # 25
Which application generates the commissioning file(s)?

A. NSP
B. NFM-T
C. CPB
D. EPT

Answer: C

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 # 26
Which of the following statements about the contentionless feature on a CDC-F node is TRUE?

A. It represents the ability to reroute lambdas to any direction.
B. It represents the ability to support the Fixed Grid standard.
C. It represents the ability to drop any lambda from any Add/Drop block port.
D. It represents the ability to drop the same wavelength from different degrees.

Answer: D

Explanation:
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
The term CDC-F stands for Colorless, Directionless, Contentionless, and Flex-grid. While "Colorless" allows any wavelength on any port and "Directionless" allows any port to be routed to any output fiber (degree), Contentionless solves a specific physical limitation of traditional multiplexers. In a standard ROADM, you cannot drop the same wavelength (e.g., Channel 21) from two different directions (e.g., North and West) into the same add/drop structure because they would "contend" or collide on the same internal fiber.
A Contentionless architecture (typically utilizing a Multicast Switch or MCS) allows the node to drop the same wavelength from different degrees simultaneously without interference. This is critical for high-availability mesh networks where a single transponder might need to receive a specific wavelength from a primary path and a backup path. Without contentionless capabilities, operators would have to carefully manage wavelength assignments across the entire network to ensure no two identical frequencies ever meet at the same drop structure, which significantly complicates planning and restoration.

NEW QUESTION # 27
Which of the following statements about coherent transmission in WDM technology is TRUE?

A. Coherent systems need carrier phase information at the receiver.
B. The channel allocation is flexible, according to the channel size of the signals.
C. Only multi-mode fibers can be used with coherent transmissions.
D. At each receiver, a dispersion compensation unit is often necessary, depending on the fiber length.

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
Coherent transmission represents a massive leap in optical technology, moving beyond simple "on-off keying" (Intensity Modulation) to more complex modulation formats like QPSK or 16-QAM. A fundamental requirement of a coherent receiver is the ability to recover and track the carrier phase information of the incoming signal. This is achieved by using a Local Oscillator (LO) laser at the receiver that interferes with the incoming signal, allowing the receiver to extract phase and polarization data.
Unlike legacy 10G direct-detection systems, coherent systems (like Nokia's PSE-V engine) perform Digital Signal Processing (DSP) to electronically compensate for impairments. This makes Option D false, as physical Dispersion Compensation Modules (DCMs) are actually detrimental and usually removed in coherent networks. Option B is incorrect as coherent transmission is designed for Single-Mode Fiber (SMF). Option C refers to Flex-grid technology; while coherent signals often use Flex-grid, the defining characteristic of coherent technology is the phase-sensitive detection at the receiver.

NEW QUESTION # 28
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