Free H35-260 Exam Braindumps (page: 21)

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There are five trigger conditions for the execution of protection switching. According to the priority of the trigger conditions, they are arranged from high to low.
Which of the following is correct?

  1. Locked Switching>Forced Switching>Clear Switching>Automatic Switching>Manual Switching
  2. Clear Switching > Lock Switching > Forced Switching > Automatic Switching > Manual Switching
  3. Locked Switching>Clear Switching>Forced Switching>Automatic Switching>Manual Switching
  4. Clear Switching > Forced Switching > Locked Switching > Manual Switching > Automatic Switching

Answer(s): B



The pump laser is the energy source of the EDFA, and its function is to provide energy for the amplification of the optical signal.
Which of the following wavelengths can be used as the output wavelength of the pump source in the EDFA structure?

  1. 980nm
  2. 1510nm
  3. 1480nm
  4. 1310nm

Answer(s): A,C



Standard Ethernet frame length should not be less than 64 bytes.
Which of the following factors would cause this limitation?

  1. Minimum transmission distance
  2. Maximum transmission distance
  3. Working Mechanism of Conflict Detection
  4. MAC address

Answer(s): B,C



After a certain distance transmission in the wavelength division system, the optical signal-to-noise ratio of the signal at the receiving end will decrease to a certain extent. The main reason is which of the following?

  1. Use of EDFA
  2. Use of demultiplexer
  3. No new fiber is used
  4. Fiber attenuation is too large

Answer(s): A






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