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4A0-205認證考試的學習資料

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最新的 Nokia Optical Network Professional 4A0-205 免費考試真題 (Q15-Q20):

問題 #15
With reference to trails and services, which of the following sentences is correct?

• A. Services are transported over trails; that is, services are clients with respect to trails.
• B. A trail can interconnect three ports, while a service always two.
• C. Trails are transported over services; that is, trails are clients with respect to services.
• D. A service is always associated to a single wavelength, while a trail can involve multiple wavelengths.

答案：A 解題說明：
Services are transported over trails; that is, services are clients with respect to trails. A service is a logical connection that is used to transport data from one point to another. It is created over a trail, which is a physical connection that is established by using multiple wavelengths. As such, services are clients with respect to trails, as they are transported over them.
問題 #16
A user needs to check for interface details against the commands is the correct one?

• A. 11starla 1/17 port-detail
• B. config interface detail 1/17/L1
• C. show interface 11starla 1/17/L1 detail
• D. config card 11star1a interface 1/17 detail

答案：C 解題說明：
show interface 11starla 1/17/L1 detail is the correct command to check for interface details. This command will display detailed information about the specified interface, including its status, configuration, and statistics.
問題 #17
WDM allows transmission systems to:

• A. Allocate different signals to different time slots
• B. Share a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission
• C. Transport multiple signals transparently, onto several wavelengths, all together over one single fiber
• D. Increase the bit rate of each client signal by spreading it over multiple wavelengths

答案：C 解題說明：
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.
問題 #18
How does a Raman pump work in the 1830 specific implementation?

• A. As the incoming signal power increase, the gain of the amplifier is reduced.
• B. The pump light travels in the same direction of the signal, amplifying it while it flows in the fiber towards the following node.
• C. The pump light travels in the opposite direction of the signal to be amplified, amplifying it while it arrives from the adjacent node.
• D. The amplification is done simultaneously for all channels as they enter the board.

答案：C 解題說明：
In Raman amplification, a pump laser is used to excite the Raman-active molecules in the fiber, which then amplifies the signal light as it travels in the opposite direction. In the 1830 specific implementation, the pump laser is typically a high-power laser that is launched into the fiber in the opposite direction to the signal. The pump light interacts with the Raman-active molecules in the fiber, which then amplifies the signal light as it travels in the opposite direction. This allows the Raman pump to provide a gain that increases with distance, which can be used to compensate for the loss of signal power as it travels through the fiber.
問題 #19
Which macro steps can be executed via CPB?

• A. Node supervision, system validation and system provision
• B. Node creation, systems validation and system provisioning
• C. Systems validation, system provisioning, power adjustment
• D. Power adjustment and generation of the system loss report

答案：B 解題說明：
Node creation, systems validation and system provisioning. The CPB (Commissioning Parameter Builder) application is used to generate commissioning files for a Nokia 1830 Photonic Service Switch (PSS-1) and can be used to create new nodes, validate the system configuration, and provision the system with the appropriate settings and parameters. Power adjustment and generation of system loss report are not related to CPB.
問題 #20
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