Free H31-311 Exam Braindumps (page: 6)

Page 6 of 44

Which of the following is not the advantage of WDM?

  1. Ultra-large capacity and transparent data transmission
  2. Easy to upgrade and maximizing the protection for existing investments
  3. Completely substituting for SDH devices
  4. Compatible with all optical switching networks in the future

Answer(s): C



The error correction capability of FEC is measured with the encoding gain. Which of the following statements about the encoding gain is incorrect?

  1. When the BER is constant, the OSNR saved by the correction encoding is called encoding gain.
  2. The error correction capability of FEC increases with the encoding gain.
  3. The encoding gain of the inband FEC is larger than that of the outband FE
  4. The encoding gain of AFEC is larger than that of FEC.

Answer(s): C



In the case of 1+1 linear MSP, which of the following switching modes do not require the enabling of the APS protection protocol? (Multiple Choice)

  1. Single-ended revertive mode
  2. Single-ended non-revertive mode
  3. Dual-ended revertive mode
  4. Dual-ended non-revertive mode

Answer(s): A,B



WDM multiplexes the optical signals at multiple rates (wavelengths) over one fiber for transmission. The digital signals carried by these optical signals must have the same rate and data format.

  1. TRUE
  2. FALSE

Answer(s): B



Page 6 of 44



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