Nokia 4A0-255 Exam Practice Test Instant Access

Question 1

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 2

Which of the following statements about the recovery time for protection and restoration combined (PRC) is correct?

APRC can be as fact as sub-network connection protection (SNCP)

BPRC is as fast as restoration mechanisms.

CPRC has a recovery time that depends on the broken links.

DPRC has a typical recovery time greater than 50 ms.

Answer : B

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 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 5

Consider the exhibit, where the two highest ports are OT line ports. Which of the following statements is correct?

AThe OCH protection is implemented.

BThe O-SNCP protection is implemented.

CThe E-SNCP protection is implemented.

DAn OPS is required upstream (left of the OT).

Answer : D

Question 6

Consider the exhibit that shows a link power budget diagram. Which of the following is represented at location 2?

APower range

BOSNR margin

CMinimum attenuation

DSystem aging margin

Answer : A

Question 7

Which of the following about the Optical channel Transport Unit (OUT0 in ONT network is correct?

AOUT refer to the section between two multiplexers passing through one or more amplifiers.

BOUT refers to the section between two amplifiers.

COUT enables the multiplexing of OCH connections.

DOUT enables FEC processing.

Answer : A

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