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Nokia 4A0-205 Exam Syllabus Topics:

Section	Weight	Objectives
Network Survivability and Protection	15%	- Availability and survivability concepts - Path and line protection schemes - Protection and restoration mechanisms
Optical Networking Basics	20%	- Optical components and functions - Optical signal propagation and characteristics - Fiber types, properties and transmission principles
Network Management and Operations	20%	- Performance monitoring, alarms and troubleshooting - NFM-T / WS-NOC management system overview - Network commissioning and monitoring - Network design with 1830 EPT / WaveSuite Planner
Optical Network Architecture and Nodes	20%	- WDM node types and functionalities - Network topologies and transport architectures - Switched WDM (SWDM) principles
WDM Technology and Systems	25%	- Optical amplifiers and transmission engineering - DWDM system architecture and building blocks - Wavelength Division Multiplexing concepts

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Nokia Optical Networking Fundamentals Sample Questions (Q28-Q33):

NEW QUESTION # 28
What is a degree-1 node?

A. A node with one direction only and therefore used as In-Line-Amplifier (ILA)
B. A node with only one express channel and therefore made of two sides
C. A node with only east and west sides without directions towards north and south
D. A node with only one direction and therefore a terminal node

Answer: D

Explanation:
A degree-1 node is a node that only has one direction, and it is therefore a terminal node. This means that the node only has one input and one output port. It does not have any other ports to connect to other nodes or fibers. This is a common feature of some optical transport networks, such as ring networks, where a degree-1 node serves as the endpoint of the ring.

NEW QUESTION # 29
Is it possible to select the fiber type independently for each segment while designing a network in EPT?

A. Yes, during the link creation through the wizard
B. No, as the fiber type is selected for links only and it's one for whole design
C. No, a unique type is allowed per design for all segments
D. Yes, during the segment creation phase or editing

Answer: D

Explanation:
Yes, during the segment creation phase or editing. It is possible to select the fiber type independently for each segment while designing a network in EPT. This can be done during the segment creation phase or when editing an existing segment. This allows for more flexibility when designing the network and allows for more efficient use of resources.

NEW QUESTION # 30
Which of the following applications is related to Wavelength Tracker tool?

A. Correcting errors related to wavelength inconsistencies
B. Collecting logs related to possible issue affecting a wavelength path
C. Tracing the end-to-end wavelength optical power
D. Tracking the protection path for a specific wavelength

Answer: D

Explanation:
Tracking the protection path for a specific wavelength. The Wavelength Tracker tool is used to track the protection path of a specific wavelength, allowing the user to quickly identify any issues that may arise and take corrective action.
Wavelength Tracker tool is a feature used to monitor and track the protection path for a specific wavelength in an optical network. It can also be used to monitor and verify the working state of the protection path, and to detect and troubleshoot protection switch events. The Wavelength Tracker tool can be used to monitor the protection path for a specific wavelength, and it can also be used to trace the end-to-end path of a wavelength through the network. This tool is typically used by network operators to monitor and troubleshoot wavelength-level issues in the network, such as protection switch events or wavelength-level performance issues.

NEW QUESTION # 31
What is the purpose of the NFM-T node synchronization?

A. The 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).
B. The partial or full node synchronization allows several entities/items defined at NFM-T level to be written into the node database (download).
C. The partial or full node synchronization allows several entities/items defined at node level to be retrieved into the NFM-T database (upload).
D. The partial or full node synchronization allows several entities/items defined at EPT level to be retrieved into the NFM-T database (upload from design).

Answer: B

Explanation:
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.

NEW QUESTION # 32
In which of the following forms does the TTI byte provide information on network elements?

A. Source (SAPI) and Destination (DAPI) Access Point Identifiers
B. Source and destination MAC addresses
C. Source and destination time-slot identifiers
D. Source and destination IP addresses and overhead

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
In the Optical Transport Network (OTN) hierarchy, the TTI (Trail Trace Identifier) is a 64-byte overhead signal used to ensure that the source and destination of a path are correctly connected. It is part of the overhead in the OTU (Optical Transport Unit) and ODU (Optical Data Unit) layers. The TTI provides a mechanism for "path trace" to prevent misconnections. It specifically carries the SAPI (Source Access Point Identifier) and the DAPI (Destination Access Point Identifier).
These identifiers are strings that uniquely identify the source and destination ports. By comparing the "Expected SAPI/DAPI" configured on a port with the "Received SAPI/DAPI" actually coming in over the fiber, the Nokia 1830 PSS can detect fiber patching errors or cross-connect mistakes. If there is a mismatch, the system can trigger a TIM (Trace Identifier Mismatch) alarm and potentially squelch the traffic to prevent data from being delivered to the wrong customer. This is a Layer 1 (OTN) function and is entirely independent of Layer 2 MAC addresses or Layer 3 IP addresses used by the management system for DCN (Data Communication Network) connectivity.

NEW QUESTION # 33
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