Updated Jun-2023 100% Cover Real 4A0-205 Exam Questions - 100% Pass Guarantee

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To prepare for the Nokia 4A0-205 exam, candidates can take advantage of a range of resources, including training courses, study guides, and practice exams. Nokia also offers a variety of certification tracks that allow professionals to specialize in areas such as network design, service routing, and service management.

 

NEW QUESTION # 11
Which of the following is an example of optical protection mechanism?

• A. Optical regeneration (e.g., back-to-back regeneration)
• B. OSNCP (e.g., via Y-cable or OPS card)
• C. GMPLS-enabled SBR
• D. GR and SBR combined

Answer: B

Explanation:
It can be implemented through the use of a Y-cable or an optical protection switch (OPS) card, which allows for the switching of traffic to a secondary path in the event of a failure on the primary path. This type of protection is commonly used to protect against fiber cuts and other types of physical layer failures in the optical transport network.

NEW QUESTION # 12
What is the function of a pre-amplifier in an optical network?

• A. Through the pre-amplifier, the optical signal is amplified at the receiver side after it travels along the fiber from another node.
• B. Through the pre-amplifier, the optical signal is amplified both the receiver side and at the transmitter side.
• C. Through the pre-amplifier, the optical signal is amplified at the transmitter side before it is sent to the line span.
• D. Through the pre-amplifier, the optical signal is amplified within the node internally to recover internal losses due, for instance, to cascaded filters.

Answer: C

Explanation:
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.

NEW QUESTION # 13
Is it possible to mix PSS-24x and PSS-8x shelves In an SWDM configuration?

• A. Yes, but the PSS-8X shelf must be configured as a master
• B. No, as they are not compatible and cannot be used within the same node
• C. Yes, but the PSS-24X shelf must be configured as a master
• D. Yes, as both can be equipped within the same node

Answer: B

Explanation:
No, it is not possible to mix PSS-24x and PSS-8x shelves in an SWDM (Short Wavelength Division Multiplexing) configuration. The two shelves are not compatible, and cannot be used within the same node.

NEW QUESTION # 14
By using the EPT run design command, are the previously designed elements removed?

• A. Yes, although this is not happening in case of GMPLS-enabled nodes because existing slots cannot change as they are controlled by another manager (GMRE).
• B. Yes, they are but only the first time the command is launched as - for future design phases - the existing packs need to keep the same slotting.
• C. It depends, the user is prompted to choose whether to delete or leave the previously designed elements.
• D. Not the design is always progressive, on top of the previous design.

Answer: C

Explanation:
The EPT run design command can remove previously designed elements, but the user is prompted to choose whether to delete them or leave them intact. This allows the user to progress their design while still keeping the existing elements in place. If the user selects to leave the existing elements, then they will remain in the same slots. If GMPLS nodes are used, the existing slots cannot change as they are controlled by another manager (GMRE).

NEW QUESTION # 15
In which window(s) does the attenuation reach its minimum peak?

• A. Both first and second windows
• B. Third window (1550 nm)
• C. Second window (1300 nm)
• D. First window (850 nm)

Answer: B

Explanation:
The third window (1550 nm) is where the attenuation reaches its minimum peak. This is because the materials used in fiber optic cables have minimal absorption in this wavelength range. The first and second windows (850 nm and 1300 nm respectively) have higher attenuation due to the materials used in the fiber optic cables.

NEW QUESTION # 16
What is the purpose of the NFM-T node synchronization?

• A. The partial or full node synchronization allows several entities/items defined at EPT level to be retrieved into the NFM-T database (upload from design).
• B. The partial or full node synchronization allows several entities/items defined at NFM-T level to be exported into an XML file, to be used as input for EPT (download to design).
• C. The partial or full node synchronization allows several entities/items defined at NFM-T level to be written into the node database (download).
• D. The partial or full node synchronization allows several entities/items defined at node level to be retrieved into the NFM-T database (upload).

Answer: C

Explanation:
This is done in order to keep the NFM-T database in sync with the nodes in the network. The synchronization process allows the NFM-T to keep track of any changes that are made to the nodes, such as new nodes added, nodes removed, and so on. By synchronizing the node database with the NFM-T, network administrators can ensure that their network is up to date and running efficiently.

NEW QUESTION # 17
What is a trail?

• A. A transparent transport of a client signal
• B. A link between end points to increase the power budget of the optical link
• C. An entity to encapsulate a low order signal into a high order container
• D. A physical link between two optical amplifiers

Answer: A

Explanation:
A trail is a transparent transport of a client signal. A trail is a physical link between two points in an optical network, allowing for the transport of a client signal from one point to the other. It is a low-order signal, such as a 10G Ethernet or a Fibre Channel signal, encapsulated into a high-order container, such as a 40G or 100G signal. This allows for the transport of the client signal over longer distances, increasing the power budget of the optical link.

NEW QUESTION # 18
Which of the following statements is true about chromatic dispersion (CD)?

• A. Different wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed.
• B. The fiber attenuation introduces inter-channel interference.
• C. The fiber attenuation changes along the fiber, and when the light crosses these differences the CD takes place.
• D. Different channels have different bandwidth and this causes different CD performances.

Answer: A

Explanation:
Different wavelengths propagate at different speeds within the same media and therefore different colors travel in the fiber with different speed. This phenomenon is known as chromatic dispersion and causes light to spread out as it travels through the fiber over distance, leading to signal attenuation and distortion. The fiber attenuation does not introduce inter-channel interference, but it can cause attenuation of the signal. Different channels have different bandwidths, but this does not affect CD performance.

NEW QUESTION # 19
A user needs to check for interface details against the commands is the correct one?

• A. show interface 11starla 1/17/L1 detail
• B. config interface detail 1/17/L1
• C. 11starla 1/17 port-detail
• D. config card 11star1a interface 1/17 detail

Answer: A

Explanation:
show interface 11starla 1/17/L1 detail is the correct command to check for interface details. This command will display detailed information about the specified interface, including its status, configuration, and statistics.

NEW QUESTION # 20
Which mechanisms can be put in place to increase network survivability?

• A. Protection, where backup resources are allocated upon failure; or restoration, where backup resources are pre-allocated and reserved
• B. Protection, where backup resources are allocated upon failure; or restoration, where each trail can be recovered thanks to a 1+1 protection mechanism
• C. Protection, where backup resources are pre-allocated and reserved; or restoration, where each trail can be recovered thanks to a 1+1 protection mechanism
• D. Protection, where backup resources are pre-allocated and reserved; or restoration, where backup resources are allocated upon failure.

Answer: D

Explanation:
There are two main mechanisms that can be put in place to increase network survivability: protection and restoration. Protection involves pre-allocating and reserving backup resources so that they are ready in case of a failure. Restoration involves allocating backup resources upon failure and using a 1+1 protection mechanism to recover each trail. This ensures that the network is able to re-route traffic in the event of a failure, increasing the overall survivability of the network.

NEW QUESTION # 21
Which of the following applications is related to Wavelength Tracker tool?

• A. Tracing the end-to-end wavelength optical power
• B. Tracking the protection path for a specific wavelength
• C. Collecting logs related to possible issue affecting a wavelength path
• D. Correcting errors related to wavelength inconsistencies

Answer: B

Explanation:
Tracking the protection path for a specific wavelength. The Wavelength Tracker tool is used to track the protection path of a specific wavelength, allowing the user to quickly identify any issues that may arise and take corrective action.
Wavelength Tracker tool is a feature used to monitor and track the protection path for a specific wavelength in an optical network. It can also be used to monitor and verify the working state of the protection path, and to detect and troubleshoot protection switch events. The Wavelength Tracker tool can be used to monitor the protection path for a specific wavelength, and it can also be used to trace the end-to-end path of a wavelength through the network. This tool is typically used by network operators to monitor and troubleshoot wavelength-level issues in the network, such as protection switch events or wavelength-level performance issues.

NEW QUESTION # 22
How is it possible to check the activation status of GMRE on a node?

• A. The ControlPlane status column on the node list displays the GMRE status for the selected node
• B. The GMRE activation status is reported in the supervision state column on the node list
• C. The GMRE activation status is reflected on the color of the icon representing the node
• D. The GMRE reachability can be tested via ping request from NFM-T

Answer: B

Explanation:
The GMRE activation status is reported in the supervision state column on the node list. The supervision state column displays the GMRE status of the node, which is either "Activated" or "Not Activated". This allows the user to quickly check the GMRE activation status of a node without having to ping the node from the NFM-T platform.

NEW QUESTION # 23
Which application generates the commissioning file(s)?

• A. CPB
• B. NFM-T
• C. EPT
• D. NSP

Answer: A

Explanation:
The CPB (Commissioning Parameter Builder) application is used to generate the commissioning files for a Nokia 1830 Photonic Service Switch (PSS-1). The CPB application allows the user to create multiple commissioning files [1][2], which can be used to configure a variety of different features on the device. The CPB also allows users to view, edit and modify the commissioning files before they are uploaded to the device. The NSP (Network Service Platform) and EPT (Element Provisioning Tool) are used to manage the devices and network elements within the network, but do not generate commissioning files.

NEW QUESTION # 24
Is it possible to modify node parameters within the edit EPT menu?

• A. Yes, the user can apply manual changes directly from this view
• B. Yes, the user can apply manual changes but only for non-GMPLS nodes, as the control plane reserves node resources not editable by the user
• C. Yes, but the user can modify only the node name and location
• D. No, this view is used to display a close-up view of the node

Answer: B

Explanation:
Yes, the user can apply manual changes but only for non-GMPLS nodes, as the control plane reserves node resources not editable by the user. The edit EPT menu allows the user to view information about a node but is not used to modify node parameters. The user can only apply manual changes to non-GMPLS nodes, as the control plane reserves node resources which cannot be modified by the user.

NEW QUESTION # 25
With reference to trails and services, which of the following sentences is correct?

• A. Trails are transported over services; that is, trails are clients with respect to services.
• B. Services are transported over trails; that is, services are clients with respect to trails.
• C. A service is always associated to a single wavelength, while a trail can involve multiple wavelengths.
• D. A trail can interconnect three ports, while a service always two.

Answer: B

Explanation:
Services are transported over trails; that is, services are clients with respect to trails. A service is a logical connection that is used to transport data from one point to another. It is created over a trail, which is a physical connection that is established by using multiple wavelengths. As such, services are clients with respect to trails, as they are transported over them.

NEW QUESTION # 26
What is a degree-1 node?

• A. A node with only one direction and therefore a terminal node
• B. A node with only one express channel and therefore made of two sides
• C. A node with only east and west sides without directions towards north and south
• D. A node with one direction only and therefore used as In-Line-Amplifier (ILA)

Answer: A

Explanation:
A degree-1 node is a node that only has one direction, and it is therefore a terminal node. This means that the node only has one input and one output port. It does not have any other ports to connect to other nodes or fibers. This is a common feature of some optical transport networks, such as ring networks, where a degree-1 node serves as the endpoint of the ring.

NEW QUESTION # 27
With reference to the image, where is the OPS card placed to provide the OMSP protection?

• A. Between the transponders and the mux/demux
• B. Before the transponder, on the client side, towards the external device
• C. After the amplifiers
• D. Between the mux/demux and the amplifier

Answer: B

NEW QUESTION # 28
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