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Free 4A0-205 Exam Braindumps (page: 4)

Page 3 of 18
PDF with 68 Questions

Which of the following sentence about FlexGrid is false?

  1. FlexGrid allows a more efficient channel spacing.
  2. Channels in FlexGrid systems are allocated with a granularity of 27.5 GHz.
  3. FlexGrid systems use specific sets of boards. Old generation WDM systems need to be upgraded to support FlexGrid.
  4. The FlexGrid is currently standardized by ITU-T.

Answer(s): C



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

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

Answer(s): C



What is a degree-1 node?

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

Answer(s): A



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

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

Answer(s): C






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