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最新4A0-205題庫資訊 - 4A0-205熱門認證

• Publicado por pug pop 9 de abril de 2023 - Arquivado em Arte & Cultura - #最新4A0-205題庫資訊  #4A0-205熱門認證  #4A0-205考古題更新  #最新4A0-205題庫  #免費下載4A0-205考題  - 3 visualizações

  

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  最新的 Nokia Optical Network Professional 4A0-205 免費考試真題 (Q24-Q29):

  問題 #24
  What is the function of a pre-amplifier in an optical network?

  • A. Through the pre-amplifier, the optical signal is amplified at the receiver side after it travels along the fiber from another node.
  • B. Through the pre-amplifier, the optical signal is amplified both the receiver side and at the transmitter side.
  • C. Through the pre-amplifier, the optical signal is amplified at the transmitter side before it is sent to the line span.
  • D. Through the pre-amplifier, the optical signal is amplified within the node internally to recover internal losses due, for instance, to cascaded filters.

  答案：C

  解題說明：
  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.

  
  

  問題 #25
  Where is the OPS card equipped to provide the optical channel protection?

  • A. Between the filters and the amplifiers
  • B. Between the transponder and the amplifiers
  • C. Before the transponder, on the client side, towards the external device
  • D. Between the transponder and the filter

  答案：B

  解題說明：
  According to the Nokia's 1830 Photonic Service Switch (PSS) product documentation, the Optical Protection Switching (OPS) card is equipped in the transponder and is responsible for providing optical channel protection between the transponder and the amplifiers. The OPS card monitors the optical signal and switches to a pre-configured protection path in case of signal degradation or loss.

  
  

  問題 #26
  What is the metro area network?

  • A. The metro area network is located in between two access area networks and made of photonic nodes only (no OCS/SWDM nodes are used there).
  • B. The metro area network is located between access and core domains.
  • C. The metro area network is that portion of network that passes through a city to provide connections to several customers.
  • D. The metro area network is made of OCS/SWDM nodes only, as no pure photonic nodes are used here.

  答案：C

  解題說明：
  The Metro Area Network (MAN) is a telecommunications network that spans a metropolitan area and connects multiple local area networks (LANs) or business networks together. It typically covers an area that is larger than a LAN but smaller than a wide area network (WAN). The purpose of a MAN is to provide a high-bandwidth, low-latency communication infrastructure for businesses and other organizations in a metropolitan area.
  Reference:
  Cisco, "Metro Ethernet Services," https://www.cisco.com/c/en/us/solutions/service-provider/metro-ethernet-services/index.html Techopedia, "Metro Area Network (MAN)," https://www.techopedia.com/definition/26896/metro-area-network-man

  
  

  問題 #27
  How does a Raman pump work in the 1830 specific implementation?

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

  答案：D

  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 #28
  A user needs to check for interface details against the commands is the correct one?

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

  答案：B

  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 #29
  ......

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