Nokia 4A0-255 Nokia Advanced Optical Network Design Exam Practice Test

QPSK

BPSK

4QAM

DP-QPSK

It is an optical signal generated by FWM impairment.

It has similar optical performance across multiple vendors equipment at 10G.

It can be measured by a VAC card.

It does not support Wavelengthtracker.

RTO/PRO define business continually requirements for data center.

RTO/PRO defined the acceptable amount of data (in bits) that can be lost after a failure.

Data center mirroring has the most critical level of RTO.RPO among DC applications.

Tier ½ data centers have stricter RTO/PRO requirements than Tire ¾.

Flexgrid is based on flexible amplification stages

Flexgrid uses flexible guardband that can take any spacing.

Flexgrid is defined on a frequency grid spacing based on ,multiples of 12.5 GHz.

Flexgrid allows channel bandwidth central frequencies and guardband to take any value in the spectrum range.

GR use reestablished backup LSPs with resources reserved and configured.

GR can achieve 100% survivability for a single-failure scenario only.

GR does not required the signaling of the fault to trigger the restoration.

GR calculates a new backup LSP every time a failure occurs.

Amplification occurs along the fiber

Chromatic dispersion within the fiber is increased.

Flat gain can be achieved in any transmission band.

OSNR is improved compared to EDFAs permitting lingers spans