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| Section | Weight | Objectives |
|---|---|---|
| Network Survivability and Protection | 15% | - Protection and restoration mechanisms - Availability and survivability concepts - Path and line protection schemes |
| Optical Networking Basics | 20% | - Optical signal propagation and characteristics - Optical components and functions - Fiber types, properties and transmission principles |
| 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% | - Wavelength Division Multiplexing concepts - Optical amplifiers and transmission engineering - DWDM system architecture and building blocks |
| Network Management and Operations | 20% | - Performance monitoring, alarms and troubleshooting - NFM-T / WS-NOC management system overview - Network design with 1830 EPT / WaveSuite Planner - Network commissioning and monitoring |
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NEW QUESTION # 40
Which of the following is NOT a troubleshooting functionality of the Wavelength Tracker?
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
The Nokia Wavelength Tracker is a unique and powerful technology used within the 1830 PSS portfolio to provide "layer 0" visibility. It works by embedding unique optical signatures (keys) onto each wavelength at the source (transponder). These signatures allow the system to identify and monitor individual channels as they traverse the optical network without the need for expensive Optical Spectrum Analyzers (OSAs) at every site.
Specifically, the Wavelength Tracker enables tracing a service along its path by identifying these unique keys at various monitoring points. It also excels at channel power monitoring, as it can measure the power level of each specific wavelength independently. Furthermore, it is instrumental in detecting unexpected or missing channels (ghost signals or misrouting) by comparing the detected keys against the expected provisioning data in the management system. However, it is not used for testing a node's internal fiber connectivity before service provisioning. Internal fiber connectivity is typically verified during the commissioning phase using the Commissioning and Power Balancing (CPB) tool within WS-NOC or through manual physical inspection and "fiber-it" procedures. Wavelength Tracker requires an active, keyed optical signal to function, which generally exists only during or after the service provisioning stage.
NEW QUESTION # 41
WDM allows transmission systems to:
Answer: B
NEW QUESTION # 42
In which window(s) does the attenuation reach its minimum peak?
Answer: A
Explanation:
The third window (1550 nm) is where the attenuation reaches its minimum peak. This is because the materials used in fiber optic cables have minimal absorption in this wavelength range. The first and second windows (850 nm and 1300 nm respectively) have higher attenuation due to the materials used in the fiber optic cables.
NEW QUESTION # 43
Which of the following statements about Optical Add/Drop Multiplexers (OADMs) is FALSE?
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
In the context of the Nokia 1830 PSS (Photonic Service Switch) and general WDM principles, the statement that OADMs always require O-E-O (Optical-Electrical-Optical) conversion for pass-through channels is fundamentally incorrect. The primary purpose of an OADM is to provide the ability to "add" or "drop" specific wavelengths while allowing other wavelengths (known as express or pass-through channels) to continue through the node entirely in the photonic domain.
By remaining in the optical layer, these express channels avoid the latency and cost associated with O-E-O conversion. FOADMs (Fixed OADMs) use static filters to achieve this, while ROADMs (Reconfigurable OADMs) use Wavelength Selective Switches (WSS) to dynamically route traffic. O-E-O conversion only occurs at the transponder or muxponder level when a service is terminated (dropped) or initiated (added) to convert the client signal into a compliant DWDM wavelength. Therefore, the efficiency of an optical network relies on the fact that pass-through traffic stays as light, bypassing the need for electrical processing at every node.
NEW QUESTION # 44
Which statement is correct about node synchronization?
Answer: B
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 # 45
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