Free RCDD Exam Braindumps (page: 6)

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Optical transmitters are typically one of the following types EXCEPT:

  1. Light-emitting diode (LED)
  2. Short wavelength laser compact disc (CD)
  3. Vertical cavity surface emitting laser (VCEL)
  4. Laser diode (LD)
  5. Overfilled launch (OFL)

Answer(s): E



All of the following are nominal wavelengths for laser light sources EXCEPT:

  1. 700 nm
  2. 850 nm
  3. 1300 nm
  4. 1310 nm
  5. 1550 nm

Answer(s): A



A SONET OC-1 channel can carry 672 voice signals and has a data rate of 51.84 Mbps. A SONET OC-48 channel can carry 32,256 voice channels.
What MINIMUM data rate is required for the OC-48 channel?

  1. 155 Mbps
  2. 622 Mbps
  3. 2.5 Gbps
  4. 5 Gbps
  5. 10 Gbps

Answer(s): C



Wave division multiplexing (WDM) is most similar to:

  1. Amplitude modulation
  2. Frequency modulation
  3. Time division multiplexing
  4. Frequency division multiplexing
  5. Carrier sense multiple access with collision detection (CSMA/CD)

Answer(s): D






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