Nokia 4A0-255 Exam Questions Instant Access

Question 1

What is guardband required for?

ATo reduce the impact of chromatic dispersion.

BTo properly use the available bandwidth of the fibers.

CTo enable each channel to support a higher modulation format.

DTo reduce non-linear impairments between coherent and non-coherent channels.

Answer : D

Question 2

Consider an OTN-based network controlled by GMPLS. Which of the following statements is correct?

AAn OCH LSP can be routed through an ODU LSP.

BAn ODU LSP can be routed through an OCH LSP.

CAn ODU LSP is routed between two photonic layer nodes.

DThe routing of the individual ODU frames is based on their label

Answer : D

Question 3

Consider the exhibit that shows the OTN frame structure . Which of the following sets of label is correct?

AOUT: B: ODU: C: OPU: D: OPU

BOUT: B: ODU: C: OPU: D: OCH

COPU: B: OTU: C: ODU: D: OPU

DODU: B: OYU: C: OPU: D: OPU

Answer : C

Question 4

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 5

Which of the following best describes self-phase modulation?

AIt is a type of modulation format exploiting the phase to carry information.

BIt is a phase shift suffered by an optical signal caused by its power intensity.

CIt is s type of impairment that can be compensated using DCMs

DIt is a type of impairment cause by spectrally adjacent channels.

Answer : D

Question 6

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

AQPSK

BBPSK

C4QAM

DDP-QPSK

Answer : C

Question 7

Consider the exhibit. Which of the following NE architectures is represented?

ATOADm

B(Classic) ROADM

CC-F ROADM

DCDC-F ROADm

Answer : A

Nokia Advanced Optical Network Design 4A0-255 Exam Questions