Online Access Free 4A0-255 Practice Test

Consider the exhibit showing the schematic for an NE ina deployed optical network. Thetraffic growth forecast is for the use of 40 channels in 3 years. The customer needs to reduce thespace for the shelf. Among the following, which additional input is NOT necessary to meet these specific requirements?

• A.Power supply
• B.Mean time to repair for the equipment
• C.Rack size
• D.Expected traffic added-dropped at the site

What does an OPU tributary slot contain, when multiplexing OTN frames?

• A.An OUT.
• B.An ODU.
• C.An OH byte
• D.An OPU.

Suppose there is a 40 Gbit/s signal which has a symbol rate of Gbaud/s. Which modulation format is being used?

• A.BPSK
• B.4QAM
• C.DP-QPSK
• D.QPSK

Which of the following statements about an alien wavelength at 10G is correct?

• A.It is an optical signal generated by FWM impairment.
• B.It has similar optical performance across multiple vendors equipment at 10G.
• C.It does not support Wavelengthtracker.
• D.It can be measured by a VAC card.

Which ofthe following statements about Raman amplification is FALSE?

• A.Amplification occurs along the fiber
• B.Flat gain can be achieved in any transmission band.
• C.OSNR is improved compared to EDFAs permitting lingers spans
• D.Chromatic dispersion within the fiber is increased.