2024 Latest Nokia 4A0-205 Real Exam Dumps PDF
4A0-205 Exam Dumps, 4A0-205 Practice Test Questions
NEW QUESTION # 12
Where is the OPS card equipped to provide the optical channel protection?
- A. Between the filters and the amplifiers
- B. Between the transponder and the filter
- C. Before the transponder, on the client side, towards the external device
- D. Between the transponder and the amplifiers
Answer: D
Explanation:
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.
NEW QUESTION # 13
What is the OAMP LAN interface?
- A. It is an RJ-45 interface (common Ethernet port) used to connect one or more client ports (e.g., 1Gb/s or legacy 100Mbit/s client flows)
- B. It is an RJ-45 interface (a common Ethernet port) used to export active alarms to an external device, typically equipped with several LEDs
- C. It is an RJ-45 interface (a common Ethernet port) used for cascading 1830 PSS nodes (e.g., external shelves)
- D. It is an RJ-45 interface (a common Ethernet port) that has to be configured with an IP address for node reachability and management
Answer: D
Explanation:
It is an RJ-45 interface (a common Ethernet port) that has to be configured with an IP address for node reachability and management. This interface is used to connect the OAMP node to the LAN, allowing it to be managed and monitored remotely.
NEW QUESTION # 14
Which of the following are the main reasons for fiber attenuation?
- A. Small channel spacing
- B. Chromatic dispersion (CD) and polarization mode dispersion
- C. Refraction and reflection
- 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 # 15
What is a trail?
- A. An entity to encapsulate a low order signal into a high order container
- B. A transparent transport of a client signal
- C. A physical link between two optical amplifiers
- D. A link between end points to increase the power budget of the optical link
Answer: B
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 # 16
WDM allows transmission systems to:
- A. Transport multiple signals transparently, onto several wavelengths, all together over one single fiber
- B. Increase the bit rate of each client signal by spreading it over multiple wavelengths
- C. Share a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission
- D. Allocate different signals to different time slots
Answer: A
Explanation:
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.
NEW QUESTION # 17
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. After the amplifiers
- C. Before the transponder, on the client side, towards the external device
- D. Between the mux/demux and the amplifier
Answer: C
NEW QUESTION # 18
When monitoring the quality of the received signal in WDM, an open eye indicates:
- A. High distortion
- B. Low noise
- C. High jitter
- D. Presence of high inter-symbolic interference
Answer: B
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 # 19
What is the metro area network?
- A. The metro area network is located between access and core domains.
- B. The metro area network is made of OCS/SWDM nodes only, as no pure photonic nodes are used here.
- C. The metro area network is that portion of network that passes through a city to provide connections to several customers.
- D. 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).
Answer: C
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 # 20
Which use case is most suitable for the deployment of a star topology?
- A. Access networks, for collecting traffic towards the main central node
- B. Backbone networks, for supporting protection routes
- C. SNCP-protected links
- D. ASON networks, to protect traffic via GMPL5 protocols
Answer: A
Explanation:
A star topology is a network design where all devices are connected to a central hub, which acts as a central point of control and management for the network. This type of topology is commonly used in access networks, where a central node is used to aggregate traffic from multiple users or devices, and then forward it to the core network. This design allows for efficient use of resources and easy management of the network.
Reference:
"Computer Networking: A Top-Down Approach" by James Kurose and Keith Ross (Chapter 3)
"Data Communications and Networking" by Behrouz A. Forouzan (Chapter 2)
NEW QUESTION # 21
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 used to measure optical power performances over an existing network before making changes.
- D. This step is optional and is useful to verify the network element layout before going through the commission step.
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 # 22
What is a Shared Risk Group (SRG)?
- A. A set of fibers that share the same latency risk
- B. A set of nodes that share a common risk of hardware failure
- C. A set of network resources that share a common failure risk
- D. A set of boards that share the same failure risk
Answer: C
Explanation:
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.
NEW QUESTION # 23
Which of the following sentences about FlexGrid is false?
- A. Channels in FlexGrid systems are allocated with a granularity of 27.5GHz.
- B. FlexGrid systems use specific sets of boards. Old generation WDM systems need to be upgraded to support FlexGrid.
- C. FlexGrid allows a more efficient channel spacing.
- D. The FlexGrid is currently standardized by ITU-T.
Answer: B
Explanation:
FlexGrid is a flexible grid technology that allows for variable channel spacing and bandwidth allocation. It uses the same sets of boards as the traditional fixed grid systems and it does not require upgrading the old generation WDM systems.
Reference:
"Flexible Grid Optical Networks: From Concepts to Realizations" by Diomidis S. Michalopoulos and George K. Karagiannidis
"Flexible Grid and Flexible Spectrum Optical Networks" by Diomidis S. Michalopoulos and George K. Karagiannidis
"Flexible Grid Optical Networks" by Diomidis S. Michalopoulos and George K. Karagiannidis
NEW QUESTION # 24
How is it possible to check the activation status of GMRE on a node?
- A. The GMRE activation status is reflected on the color of the icon representing the node
- B. The GMRE activation status is reported in the supervision state column on the node list
- C. The GMRE reachability can be tested via ping request from NFM-T
- D. The ControlPlane status column on the node list displays the GMRE status for the selected node
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 # 25
In which window(s) does the attenuation reach its minimum peak?
- A. Third window (1550 nm)
- B. Both first and second windows
- C. Second window (1300 nm)
- D. First window (850 nm)
Answer: A
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 # 26
A user needs to check for interface details against the commands is the correct one?
- A. 11starla 1/17 port-detail
- B. show interface 11starla 1/17/L1 detail
- C. config interface detail 1/17/L1
- D. config card 11star1a interface 1/17 detail
Answer: B
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 # 27
Which macro steps can be executed via CPB?
- A. Power adjustment and generation of the system loss report
- B. Node creation, systems validation and system provisioning
- C. Systems validation, system provisioning, power adjustment
- D. Node supervision, system validation and system provision
Answer: B
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 # 28
Which application generates the commissioning file(s)?
- A. EPT
- B. NSP
- C. CPB
- D. NFM-T
Answer: C
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 # 29
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