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Question No: 1

MultipleChoice

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

Options

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

Question No: 2

MultipleChoice

Refer to the exhibit.

Consider the above exhibit, which shows a WDM network map from EPT. A new trail at 10G needs to be created from Site1 to Site3. The design tool routes the trail through Site1 but the trail is evaluated as invalid due to insufficient OSNR margin. Among the following option, which is NOT effective for making the 10G trail valid?

Options

AUse a FEC with a lower code rate

BUse 3R regeneration at Site2

CUse a DCM at Site 2
D, Use a Raman amplifier at Site2

Question No: 3

MultipleChoice

Suppose that for a given number of buffer credits and for an given average FC frame size, the maximum FC link length is 50 km.

If the average FC frame size is doubled, Which option best is correct?

Options

AThe throughput is halved.

BThroughput is doubled.

CThe Throughput is the same,.

DThe buffer credits need to be adjusted to achieve the maximum throughput.

Question No: 4

MultipleChoice

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

Options

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.

Question No: 5

MultipleChoice

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

Options

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.

Question No: 6

MultipleChoice

Which of the following best describes self-phase modulation?

Options

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.

Question No: 7

MultipleChoice

What is precision Time Protocol (PTP) designed for?

Options

APrecise time measurements

BSynchronization of encryption entities

CShortest path discovery

DPacket-based timing distribution

Question No: 8

MultipleChoice

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

Options

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

Free Nokia 4A0-255 Exam Dumps August 2026