2023 New 4A0-205 Dumps - Real Nokia Exam Questions
Dependable 4A0-205 Exam Dumps to Become Nokia Certified
Nokia 4A0-205: Nokia Optical Networking Fundamentals is an essential certification exam for individuals who want to establish a career in the telecommunications industry. Nokia Optical Networking Fundamentals certification is a testament to the candidate's proficiency in handling optical networking devices and protocols, making them a valuable asset to any organization. With its global recognition and accessibility, passing 4A0-205 exam is an excellent opportunity for professionals to expand their knowledge and advance their careers in the telecommunications industry.
Nokia 4A0-205 exam is ideal for individuals who are looking to enhance their knowledge and skills in the field of optical networking. 4A0-205 exam is particularly relevant for network engineers, network architects, and other professionals who are responsible for designing, implementing, and managing optical networks.
NEW QUESTION # 13
Is it possible to modify node parameters within the edit EPT menu?
- A. No, this view is used to display a close-up view of the node
- 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. Yes, the user can apply manual changes directly from this view
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 # 14
Is it possible to select the fiber type independently for each segment while designing a network in EPT?
- A. Yes, during the link creation through the wizard
- B. No, a unique type is allowed per design for all segments
- C. No, as the fiber type is selected for links only and it's one for whole design
- D. Yes, during the segment creation phase or editing
Answer: D
Explanation:
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.
NEW QUESTION # 15
Which of the following are the main reasons for fiber attenuation?
- A. Small channel spacing
- B. Refraction and reflection
- C. Chromatic dispersion (CD) and polarization mode dispersion
- D. Scattering and absorption
Answer: D
Explanation:
Scattering and absorption are the main reasons for fiber attenuation. Scattering occurs when light bounces off the sides of the fiber, while absorption happens when light is absorbed by the glass or other materials that make up the fiber. Chromatic dispersion (CD) and polarization mode dispersion (PMD) are also factors that can cause attenuation, but they are not the main causes. Small channel spacing can also cause attenuation, but it is a secondary factor and is only significant in certain cases.
NEW QUESTION # 16
What is a degree-1 node?
- A. A node with only one express channel and therefore made of two sides
- B. A node with only east and west sides without directions towards north and south
- C. A node with one direction only and therefore used as In-Line-Amplifier (ILA)
- D. A node with only one direction and therefore a terminal node
Answer: D
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 # 17
Which macro steps can be executed via CPB?
- A. Systems validation, system provisioning, power adjustment
- B. Node supervision, system validation and system provision
- C. Node creation, systems validation and system provisioning
- D. Power adjustment and generation of the system loss report
Answer: C
Explanation:
Node creation, systems validation and system provisioning. The CPB (Commissioning Parameter Builder) application is used to generate commissioning files for a Nokia 1830 Photonic Service Switch (PSS-1) and can be used to create new nodes, validate the system configuration, and provision the system with the appropriate settings and parameters. Power adjustment and generation of system loss report are not related to CPB.
NEW QUESTION # 18
What is the definition of OSNR?
- A. The OSNR is defined as the ratio between the transmitted optical power and the received optical power over 1 km of fiber including both signal and optical noise.
- B. The OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth.
- C. The OSNR is defined as the ratio between the optical signal power (including noise) and the optical noise power over a specific spectral bandwidth.
- D. The OSNR is the ratio between the optical output signal power and the optical input signal power of the device being analyzed.
Answer: B
Explanation:
The OSNR is defined as the ratio between the average optical signal power and the average optical noise power over a specific spectral bandwidth. This is also known as the signal-to-noise ratio (SNR), and it is a measure of how much signal is present in the optical signal compared to the noise, usually expressed in decibels (dB).
NEW QUESTION # 19
What is the function of a pre-amplifier in an optical network?
- A. Through the pre-amplifier, the optical signal is amplified both the receiver side and at the transmitter side.
- B. Through the pre-amplifier, the optical signal is amplified within the node internally to recover internal losses due, for instance, to cascaded filters.
- 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 at the receiver side after it travels along the fiber from another node.
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 # 20
Which statement is correct about node synchronization?
- A. Node synchronization is executed to test the reachability of a node
- B. Full synchronization retrieves the correlated alarms from the node
- C. Node synchronization is executed to align the time of the node to the time of the NFM-T platform
- D. Full synchronization retrieves all items from the node (NE parameters. Ports, Alarms, Internal Links, etc)
Answer: D
Explanation:
Node synchronization is a process of keeping the NFM-T database in sync with the nodes in the network. The synchronization process will download all the items from the node, including NE parameters, ports, alarms, internal links, etc., to the NFM-T database. This ensures that the NFM-T database is up to date and the network is running efficiently.
NEW QUESTION # 21
When monitoring the quality of the received signal in WDM, an open eye indicates:
- A. Low noise
- B. High distortion
- C. High jitter
- D. Presence of high inter-symbolic interference
Answer: A
Explanation:
An open eye pattern indicates that the signal is not affected by noise, and the received signal is of high quality. This is because an open eye pattern is the result of a signal that is aligned in time, and is not affected by noise or other distortions.
Reference:
"Optical Fiber Communications" by Gerd Keiser
"Fiber-Optic Communications Technology" by Djafar K. Mynbaev
"Optical Communications" by Gerd Keiser
NEW QUESTION # 22
How are the EPT systems related to NFM-T when CPB is performed?
- A. The systems are displayed on the CPB panel, however they cannot be individually selected as they need to run all together
- B. The systems are not reported on CPB, but only through the Equipment Manager
- C. The systems are displayed on the CPB panel and they can be individually selected
- D. The systems are not reported on CPB, as this Is transparent to the user and the whole network is validated and provisioned in one step
Answer: C
Explanation:
The EPT systems are displayed on the CPB (Commissioning Parameter Builder) panel and they can be individually selected. This allows the user to configure the network elements in the network and provision them according to their specific requirements. The systems are not reported on CPB, but through the Equipment Manager. The Equipment Manager is the interface used to configure the network elements and the EPT systems. The NFM-T is not related to the CPB and does not affect the CPB process.
NEW QUESTION # 23
What is the meaning of first, second, and third window in the optical fiber propagation context?
- A. These windows correspond to three different minimum and maximum optical power levels used for optical transmission.
- B. Different optical transmission windows correspond to different safety requirements and rules for the related lasers operating with these windows.
- C. These windows are three different wavelength intervals where the WDM optical transmission occurs.
- D. These three windows are three different angles of incidence of the light injected by the laser into the fiber.
Answer: C
Explanation:
In optical fiber propagation context, the first, second, and third window refer to different wavelength intervals where the WDM (Wavelength Division Multiplexing) optical transmission occurs.
The first window is the lowest loss window and is typically in the range of 1300-1324nm. This is the most commonly used window for long-haul communications.
The second window is the 1550 nm window and is the most widely used window for long-haul and ultra-long-haul communications. This window has a lower attenuation than the first window, but it also has more dispersion, which can limit the maximum transmission distance.
The third window is the range of 1625-1675 nm, it is also called the L-band window. This window has lower attenuation than the first and second window but its usage is limited due to the high cost of equipment and lack of commercial devices.
These windows are used in WDM systems to increase the capacity of the fiber by transmitting multiple channels of data at different wavelengths on the same fiber.
A,C,D are not correct as they are not related to the meaning of first, second, and third window in the optical fiber propagation context.
Reference:
Nokia Optical Networking Fundamentals, Nokia Press (ISBN:978-1-4822-8109-4)
https://www.nokia.com/networks/solutions/optical-networking/
https://en.wikipedia.org/wiki/Wavelength-division_multiplexing
NEW QUESTION # 24
Where can the user set the long-haul WT decoder parameter, when designing a network with EPT?
- A. In the audit menu
- B. In the optimization parameters
- C. In the network parameters
- D. In the NE parameters
Answer: D
Explanation:
The long-haul WT decoder parameter can be set in the NE parameters when designing a network with EPT. This parameter is used to adjust the sensitivity of the decoder and can help to improve the accuracy of the measurements for long-haul WTs.
The Network Element (NE) parameters in EPT (Element Planning Tool) are used to configure various settings and options for the network elements in the network. The long-haul WT decoder parameter is one such setting that can be configured in the NE parameters section. The user can access the NE parameters by navigating to the NE Parameters menu within the EPT interface. The user can then select the appropriate network element and modify the settings as needed. This information can be found in the Nokia guide for EPT.
NEW QUESTION # 25
What is the purpose of the validate step in the EPT design process?
- A. During this step, the run design action is triggered for network design consistency check and errors fixing.
- B. During this step, the configuration available on the involved network elements is compared with the design provided by EPT.
- C. This step is optional and is useful to verify the network element layout before going through the commission step.
- D. This step is used to measure optical power performances over an existing network before making changes.
Answer: A
Explanation:
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.
NEW QUESTION # 26
What is the metro area network?
- A. The metro area network is located between access and core domains.
- B. The metro area network is located in between two access area networks and made of photonic nodes only (no OCS/SWDM nodes are used there).
- C. The metro area network is made of OCS/SWDM nodes only, as no pure photonic nodes are used here.
- D. The metro area network is that portion of network that passes through a city to provide connections to several customers.
Answer: D
Explanation:
The Metro Area Network (MAN) is a telecommunications network that spans a metropolitan area and connects multiple local area networks (LANs) or business networks together. It typically covers an area that is larger than a LAN but smaller than a wide area network (WAN). The purpose of a MAN is to provide a high-bandwidth, low-latency communication infrastructure for businesses and other organizations in a metropolitan area.
Reference:
Cisco, "Metro Ethernet Services," https://www.cisco.com/c/en/us/solutions/service-provider/metro-ethernet-services/index.html Techopedia, "Metro Area Network (MAN)," https://www.techopedia.com/definition/26896/metro-area-network-man
NEW QUESTION # 27
What is the purpose of the NFM-T node synchronization?
- A. The partial or full node synchronization allows several entities/items defined at NFM-T level to be written into the node database (download).
- 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 EPT level to be retrieved into the NFM-T database (upload from design).
- 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: A
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 # 28
Which mechanisms can be put in place to increase network survivability?
- A. Protection, where backup resources are pre-allocated and reserved; or restoration, where backup resources are allocated upon failure.
- B. Protection, where backup resources are allocated upon failure; or restoration, where backup resources are pre-allocated and reserved
- 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 allocated upon failure; or restoration, where each trail can be recovered thanks to a 1+1 protection mechanism
Answer: A
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 # 29
Is it possible to open and manage EPT designs that are created with different releases than the release installed on the local workstation?
- A. No restrictions are imposed on the software release.
- B. Only designs created with the current release can be opened and edited.
- C. Only designs created with current and older releases can be opened and edited.
- D. Designs created with an older release can be opened by a current release but cannot make changes.
Answer: C
Explanation:
It is possible to open and manage EPT designs that are created with different releases than the release installed on the local workstation, however only designs created with current and older releases can be opened and edited. Designs created with an older release can be opened by a current release but changes cannot be made.
NEW QUESTION # 30
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