Nokia 4A0-255 Exam Practice Test Instant Access

Question 1

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 2

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 3

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 4

Consider a signal at 100G PDM-QSK. Which of the following statements is true?

AIt supports more bits per symbol per polarization than 8QAM

BIt has the same Gbaud rate as 100G 8QAM.

CEach symbol supported 2 bits per polarization.

DThe Gbaud rate is 50.

Answer : A

Question 5

Which of the following is recommended to reduce the latency of a 30km long link?

ADCM-free amplifiers

BSoft-decision FEC

CLow-noise amplifiers

DL1 encryption

Answer : C

Question 6

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 7

Which of the following statements about power commissioning system is most accurate?

AA system must be either linear or a ring.
A system can stop if there is a through communication in a node.

BA system must be a ring only
A system can stop if there is a through connection in a node.

CA system must be a ring only
A system cannot stop if there is a through connection in a node.

DA system must be either linear or a ring
A system cannot stop if there is a through connection in a node

Answer : D

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