Nokia 4A0-205 Exam Practice Test Instant Access

Question 1

What is the purpose of the NFM-T node synchronization?

AThe partial or full node synchronization allows several entities/items defined at node level to be retrieved into the NFM-T database (upload).

BThe partial or full node synchronization allows several entities/items defined at NFM-T level to be written into the node database (download).

CThe partial or full node synchronization allows several entities/items defined at EPT level to be retrieved into the NFM-T database (upload from design).

DThe 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).

Answer : B

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.

Question 2

Which of the following sentences about FlexGrid is false?

AFlexGrid allows a more efficient channel spacing.

BChannels in FlexGrid systems are allocated with a granularity of 27.5GHz.

CFlexGrid systems use specific sets of boards. Old generation WDM systems need to be upgraded to support FlexGrid.

DThe FlexGrid is currently standardized by ITU-T.

Answer : C

FlexGrid is a flexible grid technology that allows for variable channel spacing and bandwidth allocation. It uses the same sets of boards as the traditional fixed grid systems and it does not require upgrading the old generation WDM systems.

'Flexible Grid Optical Networks: From Concepts to Realizations' by Diomidis S. Michalopoulos and George K. Karagiannidis

'Flexible Grid and Flexible Spectrum Optical Networks' by Diomidis S. Michalopoulos and George K. Karagiannidis

'Flexible Grid Optical Networks' by Diomidis S. Michalopoulos and George K. Karagiannidis

Question 3

With reference to the image, where is the OPS card placed to provide the OMSP protection?

AAfter the amplifiers

BBetween the mux/demux and the amplifier

CBetween the transponders and the mux/demux

DBefore the transponder, on the client side, towards the external device

Answer : D

Question 4

Which of the following statements is true?

ALogs report both active and historical events.

BAlarms and conditions report a real time status of the node.

CAlarms and conditions report only historical status of the node.

DLogs report a real time status of the node.

Answer : A

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.

Question 5

Which of the following statements is true about chromatic dispersion (CD)?

ADifferent channels have different bandwidth and this causes different CD performances.

BThe fiber attenuation changes along the fiber, and when the light crosses these differences the CD takes place.

CDifferent wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed.

DThe fiber attenuation introduces inter-channel interference.

Answer : C

Different wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed. This phenomenon is known as chromatic dispersion and causes light to spread out as it travels through the fiber over distance, leading to signal attenuation and distortion. The fiber attenuation does not introduce inter-channel interference, but it can cause attenuation of the signal. Different channels have different bandwidths, but this does not affect CD performance.

Question 6

WDM allows transmission systems to:

ATransport multiple signals transparently, onto several wavelengths, all together over one single fiber

BIncrease the bit rate of each client signal by spreading it over multiple wavelengths

CShare a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission

DAllocate different signals to different time slots

Answer : A

WDM (Wavelength Division Multiplexing) allows transmission systems to transport multiple signals transparently, onto several wavelengths, all together over one single fiber. This allows for increased capacity, as many different signals can be transmitted at the same time and along the same fiber. Other advantages include improved signal integrity and reduced signal attenuation.

Question 7

Which statement is correct about the NFM-T network map?

AIt automatically represents all nodes grouped by the location string assigned during the NE creation.

BIt represents all supervised nodes grouped by alarm status (with a different color).

CIt allows context sensitive navigation and represents nodes and related physical connections with different colors. depending on the active alarms.

DIt allows the graphical visualization of the services deployed in the network with the details of the boards involved in the service.

Answer : C

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.

Nokia 4A0-205 Nokia Optical Networking Fundamentals Exam Practice Test