Nokia 4A0-255 Exam Questions Instant Access

Question 1

What does an OPU tributary slot contain, when multiplexing OTN frames?

AAn OUT.

BAn ODU.

CAn OPU.

DAn OH byte

Answer : C

Question 2

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 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

Consider the exhibit shows the standard 8-step network design process. Suppose that you have used this process to design a Green filed network, which has been commissioned and is in operation. The customer now requests an extension to the network to accommodate more steps and traffic. Which steps are not required when designing such an extension?

AStep 2(analyze Traffic Demand and Step 4 ( Define Network Topology)

BStep (Define Network Architecture ) and Step 5( Evaluate Traffic Demand on Architecture)

CStep2 (Analyze Available) and Step 8 (Analyze Cost).

DThe steps to be followed depended on the requirement of the network extension.

Answer : C

Question 5

Which of the following statements about GMPLS features is FALSE?

AGMPLS is able to manage the optical network through the DCN.

BGMPLS is able to control OTN networks.

CGMPLS is able to compute the routing of the optical channels.

DGMPLS is able to automatically provision the optical channels.

Answer : C

Question 6

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

Question 7

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

Nokia Advanced Optical Network Design 4A0-255 Exam Questions