Nokia 4A0-255 Exam Practice Test Instant Access

Question 1

Which of the following best describes Four Wave Mixing (FWM)?

AFWM is a linear impairment that produces crosstalk four adjacent wavelengths are used.

BFWM is a non-linear impairment that produces crosstalk at the sum and difference of two wavelengths.

CFWM is a non-linear impairment resulting from varying velocities at different frequencies.

DFWM is a linear impairment resulting from pulses broadening over ultra-long distances

Answer : A

Question 2

Which of the following can be detected through power monitoring with an Optical Time Domain Reflect meter?

AIntrusions on fibers

BPower injection one channel

CHacking of L1 encryption

DIntrusions in the cryptographic keys

Answer : B

Question 3

Which of the following statements about Raman amplification is FALSE?

AAmplification occurs along the fiber

BChromatic dispersion within the fiber is increased.

CFlat gain can be achieved in any transmission band.

DOSNR is improved compared to EDFAs permitting lingers spans

Answer : D

Question 4

Refer to the exhibit that shows a demand matrix, a network topology with candidate links (in thick blue lines and dashed lines), the defined network in thick blue lines and the demand routing (colored numbers in the figure). Every link is 80 km long. Which of the following requirements is supported by this network design with the displayed demand routing?

A1+1 protection

BMinimum cost design

CMinimum latency

DResilience against two link faults

Answer : A

Question 5

Which of the following statement about guaranteed restriction (GR) in generalized Multiprotocol label Switching (GMPLS) is correct?

AGR use reestablished backup LSPs with resources reserved and configured.

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

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

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

Answer : A

Question 6

Consider the exhibit that shows a network with a full mesh fiber structure. Link weights indicate the cost. Future services can be requested between any node pair.

Which of the following topology represents a minimum cost design (minimum overall fiber cost) where link failure survivability is ensured?

AOption A

BOption B

COption C

DOption D

Answer : B

Question 7

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

ARack size

BExpected traffic added-dropped at the site

CMean time to repair for the equipment

DPower supply

Answer : D

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