Nokia 4A0-255 Exam Practice Test Instant Access

Question 1

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 2

Which of the following is NOT a functionality provided by a coherent receiver?

AAnalog-to-digital conversion (ADC)

BDigital signal processing (DSP)

CMixing

DDemultiplexing

Answer : C

Question 3

Which of the following statements about Bit Error Rate (BER) is correct?

ABER is the ratio of redundant bits to correct bits.

BBER is measured at both the transmitted and receiving ends.

CBER can be measured before after the FEC decoding.

DBER can be accurately measured in a short period of time , for any rate.

Answer : B

Question 4

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 5

Which of the following statements about the Decision (HDEFC) decoding and soft decision FEC (SDFEC) decoding is FALSE?

AHDFEC injects less latency into the decoding process than SDFEC.

BHDFEC provides a higher coding gain than SDEFC

CHDFEC uses fewer thresholds than SDEFC.

DHDFEC discards bits earlier in the decoding process than SDEFC.

Answer : A

Question 6

Which of the following statements about the management plane data Communications Network (DCN) is correct?

AThe management plane DCN uses in-band communication.

BThe management plane DCN can be connected to each NEs via OSS/OBS interface.

CThe management plane DCN can be connected to each NEs directly.

DThe management plane DCN enables direct communication between the NEs.

Answer : C

Question 7

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

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