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| Section | Weight | Objectives |
|---|---|---|
| Optical Network Architecture and Nodes | 20% | - Network topologies and transport architectures - WDM node types and functionalities - Switched WDM (SWDM) principles |
| Network Management and Operations | 20% | - Network commissioning and monitoring - Network design with 1830 EPT / WaveSuite Planner - NFM-T / WS-NOC management system overview - Performance monitoring, alarms and troubleshooting |
| Network Survivability and Protection | 15% | - Path and line protection schemes - Protection and restoration mechanisms - Availability and survivability concepts |
| WDM Technology and Systems | 25% | - DWDM system architecture and building blocks - Wavelength Division Multiplexing concepts - Optical amplifiers and transmission engineering |
| Optical Networking Basics | 20% | - Optical signal propagation and characteristics - Optical components and functions - Fiber types, properties and transmission principles |
The Nokia 4A0-205 exam dumps are top-rated and real Nokia 4A0-205 practice questions that will enable you to pass the final Nokia 4A0-205 exam easily. GuideTorrent is one of the best platforms that has been helping Nokia 4A0-205 Exam candidates. You can also get help from actual Nokia 4A0-205 exam questions and pass your dream Nokia 4A0-205 certification exam.
NEW QUESTION # 30
What is the meaning of first, second, and third window in the optical fiber propagation context?
Answer: A
Explanation:
In optical fiber propagation context, the first, second, and third window refer to different wavelength intervals where the WDM (Wavelength Division Multiplexing) optical transmission occurs.
The first window is the lowest loss window and is typically in the range of 1300-1324nm. This is the most commonly used window for long-haul communications.
The second window is the 1550 nm window and is the most widely used window for long-haul and ultra-long-haul communications. This window has a lower attenuation than the first window, but it also has more dispersion, which can limit the maximum transmission distance.
The third window is the range of 1625-1675 nm, it is also called the L-band window. This window has lower attenuation than the first and second window but its usage is limited due to the high cost of equipment and lack of commercial devices.
These windows are used in WDM systems to increase the capacity of the fiber by transmitting multiple channels of data at different wavelengths on the same fiber.
A,C,D are not correct as they are not related to the meaning of first, second, and third window in the optical fiber propagation context.
Reference:
Nokia Optical Networking Fundamentals, Nokia Press (ISBN:978-1-4822-8109-4)
https://www.nokia.com/networks/solutions/optical-networking/
https://en.wikipedia.org/wiki/Wavelength-division_multiplexing
NEW QUESTION # 31
Which of the following is NOT a troubleshooting functionality of the Wavelength Tracker?
Answer: A
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 # 32
By using the EPT run design command, are the previously designed elements removed?
Answer: C
Explanation:
The EPT run design command can remove previously designed elements, but the user is prompted to choose whether to delete them or leave them intact. This allows the user to progress their design while still keeping the existing elements in place. If the user selects to leave the existing elements, then they will remain in the same slots. If GMPLS nodes are used, the existing slots cannot change as they are controlled by another manager (GMRE).
NEW QUESTION # 33
What is the function of a pre-amplifier in an optical network?
Answer: B
Explanation:
A pre-amplifier is an optical amplifier that is used to boost the power of the received optical signal before it is detected by the receiver in an optical communication system. This is done to overcome the loss of power that occurs as the signal travels through the optical fiber and to ensure that the receiver can detect the signal. The pre-amplification stage is typically located close to the receiver in order to minimize the distance that the signal has to travel between the amplifier and the receiver, which helps to reduce the noise and distortion in the signal.
NEW QUESTION # 34
Which mechanisms can be put in place to increase network survivability?
Answer: C
Explanation:
There are two main mechanisms that can be put in place to increase network survivability: protection and restoration. Protection involves pre-allocating and reserving backup resources so that they are ready in case of a failure. Restoration involves allocating backup resources upon failure and using a 1+1 protection mechanism to recover each trail. This ensures that the network is able to re-route traffic in the event of a failure, increasing the overall survivability of the network.
NEW QUESTION # 35
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