Nokia 4A0-205 Exam Practice Test Instant Access

Question 1

What is the function of a pre-amplifier in an optical network?

AThrough the pre-amplifier, the optical signal is amplified at the receiver side after it travels along the fiber from another node.

BThrough the pre-amplifier, the optical signal is amplified at the transmitter side before it is sent to the line span.

CThrough the pre-amplifier, the optical signal is amplified both the receiver side and at the transmitter side.

DThrough the pre-amplifier, the optical signal is amplified within the node internally to recover internal losses due, for instance, to cascaded filters.

Answer : B

A pre-amplifier is an optical amplifier that is used to boost the power of the received optical signal before it is detected by the receiver in an optical communication system. This is done to overcome the loss of power that occurs as the signal travels through the optical fiber and to ensure that the receiver can detect the signal. The pre-amplification stage is typically located close to the receiver in order to minimize the distance that the signal has to travel between the amplifier and the receiver, which helps to reduce the noise and distortion in the signal.

Question 2

What is the purpose of the validate step in the EPT design process?

ADuring this step, the configuration available on the involved network elements is compared with the design provided by EPT.

BThis step is used to measure optical power performances over an existing network before making changes.

CThis step is optional and is useful to verify the network element layout before going through the commission step.

DDuring this step, the run design action is triggered for network design consistency check and errors fixing.

Answer : D

The validate step in the EPT design process is used to trigger the run design action, which is responsible for verifying the consistency of the network design and fixing any errors that may exist. During the validation process, the system will compare the configuration available on the involved network elements and the design provided by EPT, and any discrepancies will be flagged for further investigation or correction.

Question 3

What is a Shared Risk Group (SRG)?

AA set of fibers that share the same latency risk

BA set of boards that share the same failure risk

CA set of nodes that share a common risk of hardware failure

DA set of network resources that share a common failure risk

Answer : D

According to the Nokia Optical Networking documentation, a Shared Risk Group (SRG) is defined as 'a set of network resources that share a common failure risk. When a resource in an SRG fails, the other resources in the group are also affected.' This can include fibers, boards, nodes, and other network resources. The SRG concept is used in network design and protection mechanisms to ensure survivability and minimal impact on service in case of a failure.

Question 4

Where is the OPS card equipped to provide the optical channel protection?

ABetween the transponder and the amplifiers

BBetween the filters and the amplifiers

CBefore the transponder, on the client side, towards the external device

DBetween the transponder and the filter

Answer : A

According to the Nokia's 1830 Photonic Service Switch (PSS) product documentation, the Optical Protection Switching (OPS) card is equipped in the transponder and is responsible for providing optical channel protection between the transponder and the amplifiers. The OPS card monitors the optical signal and switches to a pre-configured protection path in case of signal degradation or loss.

Question 5

Is it possible to select the fiber type independently for each segment while designing a network in EPT?

AYes, during the link creation through the wizard

BNo, a unique type is allowed per design for all segments

CNo, as the fiber type is selected for links only and it's one for whole design

DYes, during the segment creation phase or editing

Answer : D

Yes, during the segment creation phase or editing. It is possible to select the fiber type independently for each segment while designing a network in EPT. This can be done during the segment creation phase or when editing an existing segment. This allows for more flexibility when designing the network and allows for more efficient use of resources.

Question 6

Which sentence about NFM-T is correct?

ANFM-T fully supports LO, LI, L2 and GMPLS applications and it is mainly focused on 1830 PSS, as well as other older product families

BNFM-T fully supports optical and IP nodes

CNFM-T is used to design and manage optical network

DNFM-T is used to provision optical services having IP nodes as extremities

Answer : D

NFM-T is a network management system designed to manage optical networks in a unified manner. It is used to design, manage, and provision optical services having IP nodes as extremities. It supports a variety of technologies, including optical and IP, and fully supports LO, LI, L2, and GMPLS applications. It is mainly focused on the Nokia 1830 PSS product family, as well as other older product families.

Question 7

WDM allows transmission systems to:

ATransport multiple signals transparently, onto several wavelengths, all together over one single fiber

BIncrease the bit rate of each client signal by spreading it over multiple wavelengths

CShare a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission

DAllocate different signals to different time slots

Answer : A

WDM (Wavelength Division Multiplexing) allows transmission systems to transport multiple signals transparently, onto several wavelengths, all together over one single fiber. This allows for increased capacity, as many different signals can be transmitted at the same time and along the same fiber. Other advantages include improved signal integrity and reduced signal attenuation.

Nokia Optical Networking Fundamentals 4A0-205 Exam Practice Test