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Optical Network Design Expert
4A0-255
Nokia Advanced Optical Network Design Questions and Answers

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Questions # 1:

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

Options:

BER is the ratio of redundant bits to correct bits.

BER is measured at both the transmitted and receiving ends.

BER can be measured beforeafter the FEC decoding.

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

Answer

Questions # 2:

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

Options:

OUT refer to the section between two multiplexers passing through one or moreamplifiers.

OUT refers to the section between two amplifiers.

OUT enables the multiplexing of OCH connections.

OUT enables FEC processing.

Answer

Questions # 3:

Consider two EDFA amplifiers in cascade. Each EDFA has an average input signal power of 10 mW and an average noise power of 1 mW. What is the OSNR of the system at the receiver.

Options:

20 dB

10 dB

7 dB

5 bB

Answer

Questions # 4:

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

Question # 4

Options:

The OCH protection is implemented.

The O-SNCP protection is implemented.

The E-SNCP protection is implemented.

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

Answer

Questions # 5:

Which of the following statements about an alien wavelength at 10G is correct?

Options:

It is an optical signal generated by FWM impairment.

It has similar optical performance across multiple vendors equipment at 10G.

It can be measured by a VAC card.

It does not support Wavelengthtracker.

Answer

Questions # 6:

Where is guardbandmandatoryfor EMF?

Options:

Between 10G and 40G channels

Between 10G and 100G channels

Between 10G and 200G channels

Between 40G and 100G channels

Answer

Questions # 7:

What does region coloring in GMPLS enable?

Options:

Efficient spectral utilization

Multi-layer network support

Government level certification

Administrative segregation

Answer

Questions # 8:

Which of the following statements about GMPLS features is FALSE?

Options:

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

GMPLS is able to control OTN networks.

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

GMPLS is able to automatically provision the optical channels.

Answer

Questions # 9:

Which of the following statement about guaranteed restriction (GR) in generalized Multiprotocol labelSwitching (GMPLS) is correct?

Options:

GR use reestablished backup LSPs with resources reserved and configured.

GR can achieve 100% survivability for a single-failure scenario only.

GR does not required the signaling of the fault to trigger the restoration.

GR calculates a new backup LSP every time a failure occurs.

Answer

Questions # 10:

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?

Question # 10