Pass Guaranteed Quiz 2024 Realistic Verified Free 4A0-220 Exam Dumps
Free Nokia Optical Network Services Expert 4A0-220 Ultimate Study Guide (Updated 40 Questions)
Nokia 4A0-220 certification exam is designed to test an individual's knowledge and skills in managing and controlling GMPLS-based optical networks using Nokia equipment. Nokia GMPLS-Controlled Optical Networks certification is important for professionals who are looking to advance their careers in the field of telecommunications and networking. 4A0-220 exam covers a wide range of topics related to GMPLS technology, including network architecture, signaling, routing, and traffic engineering.
Studying for the Nokia 4A0-220 certification exam requires a lot of dedication and hard work. It is important to have a solid understanding of the concepts and technologies covered in the exam, as well as hands-on experience working with GMPLS-controlled optical networks. There are various resources available to help you prepare for the exam, including study guides, online courses, and practice exams.
NEW QUESTION # 17
What is a Label Switched Path (LSP)?
- A. A switched protection path
- B. The path created by MPLS nodes
- C. A protocol used by nodes to exchange information about the state of labels
- D. A High Order Container for client signal
Answer: B
Explanation:
Explanation
A Label Switched Path (LSP) is the path created by MPLS nodes that use labels to forward packets across the network. A label is a short identifier that is attached to each packet and indicates the next hop or destination of the packet. The nodes use a label forwarding table to switch packets based on their labels, without inspecting the packet headers. This can improve the performance, security, and quality of service of the network. An LSP can be established by using GMPLS protocols such as OSPF-TE and RSVP-TE, which exchange information about the network topology, resources, and constraints. References : Nokia GMPLS-controlled Optical Networks Course | Nokia, GMPLS - Nokia
NEW QUESTION # 18
What is the Link Maintenance window?
- A. A centralized view of the TE-link for the operator
- B. A wizard for modifying TE-link attributes
- C. A wizard with commands to set links and nodes to maintenance
- D. A centralized alarm manager
Answer: C
Explanation:
Explanation
The Link Maintenance window is a feature of NFM-T that allows the user to perform maintenance tasks on links and nodes in a GMPLS network. The Link Maintenance window is a wizard that provides commands to set links and nodes to maintenance mode, which prevents them from being used for routing new LSPs or carrying traffic. The user can also use the Link Maintenance window to reroute existing LSPs away from the links and nodes that are in maintenance mode, either manually or automatically. The Link Maintenance window helps the user to perform network maintenance operations without disrupting the service availability or quality12. References:
* 1: Nokia GMPLS-controlled Optical Networks Course | Nokia
* 2: Nokia Network Functions Manager for Transport User Guide | Nokia
NEW QUESTION # 19
How is the GMRE functionality guaranteed in Nokia equipment?
- A. Rack redundancy guarantees GMRE functionality in case of a power outage
- B. The specific software configuration guarantees GMRE functionality
- C. Redundant LAN cables guarantee GMRE functionality
- D. Controller redundancy guarantees GMRE functionality
Answer: D
Explanation:
Explanation
The GMRE functionality is guaranteed in Nokia equipment by controller redundancy. The controller is the hardware component that runs the GMPLS software and controls the switching fabric of the node. Each node has two controllers, one active and one standby, that synchronize their states and databases. If the active controller fails, the standby controller takes over and ensures the continuity of the GMRE functionality. References : Nokia GMPLS-controlled Optical Networks Course | Nokia, 1830 Photonic Service Switch (PSS) | Nokia
NEW QUESTION # 20
What does an SNC state of lower case "n" mean for a resource in NFM-T?
- A. Indicates it's using a link other than the Nominal
- B. Indicates it's currently using the Nominal resource assigned to it
- C. Indicates the nominal resource on a TE-link that is not in use
- D. Indicates if s a higher alarm state level
Answer: C
Explanation:
Explanation
The SNC state is a parameter that indicates the status of a resource in a GMPLS network. A resource can be a link, a wavelength, a timeslot, or a fiber. The SNC state can have different values, such as N, n, P, p, R, r, and so on. Each value has a specific meaning and implication for the resource and the LSP that uses it. The SNC state of lower case "n" means that the resource is the nominal resource on a TE-link that is notin use. A nominal resource is the default or preferred resource that is assigned to an LSP when it is created. A TE-link is a logical link that represents a set of resources that share the same attributes and constraints. A TE-link can have multiple resources, such as wavelengths or timeslots, but only one of them can be the nominal resource.
If an LSP is using a resource other than the nominal resource on a TE-link, it means that the LSP has been rerouted or switched due to a failure or a constraint violation. In this case, the SNC state of the nominal resource will be "n", indicating that it is not in use by any LSP12. References:
* 1: Nokia GMPLS-controlled Optical Networks Course | Nokia
* 2: Nokia Network Functions Manager for Transport User Guide | Nokia
NEW QUESTION # 21
Which of the following best describes Quality of Service in GMPLS?
- A. The ability to set constraints such as latency and priority for different kinds of services
- B. The amount of information that is possible to store in the Traffic Engineering Database (TED)
- C. The ability to switch back to the nominal route after a failure is repaired without impacting existing traffic
- D. The possibility to have L0 and L1 switching treated with the same quality level in the same network
Answer: A
Explanation:
Explanation
Quality of Service (QoS) in GMPLS is the ability to set constraints such as latency and priority for different kinds of services. This means that GMPLS can allocate network resources according to the specific requirements of each service, such as voice, video, or data. For example, a voice service may need low latency and high priority, while a data service may need high bandwidth and low priority. GMPLS can use Traffic Engineering (TE) extensions to OSPF and RSVP protocols to advertise and reserve network resources based on QoS parameters. References : [Nokia GMPLS-controlled Optical Networks Course | Nokia], [Quality of Service - Nokia]
NEW QUESTION # 22
How do you configure the Trail template in NFM-T for an Uplink board (such as 2UC400) in an MRN network with LO and LI restoration capabilities?
- A. Check the Logical Link box
Set the Port Type to Unterminated Check the ASON Routed box Uncheck the ASON Tunnel box - B. Uncheck the Logical Link box Set the Port Type to Terminated Check the ASON Routed box Check the ASON Tunnel box
- C. Uncheck the Logical Link box Set the Port Type to Terminated Check the ASON Routed box Uncheck the ASON Tunnel box
- D. Check the Logical Link box
Set the Port Type to Unterminated Check the ASON Routed box Check the ASON Tunnel box
Answer: A
Explanation:
Explanation
To configure the Trail template in NFM-T for an Uplink board (such as 2UC400) in an MRN network with LO and LI restoration capabilities, you need to check the Logical Link box, set the Port Type to Unterminated, check the ASON Routed box, and uncheck the ASON Tunnel box. This configuration allows you to create a logical link between two Uplink boards that can be used for LO or LI restoration. The logical link is not terminated at the Uplink board, but at the OTU board. The ASON Routed option enables the GMPLS control plane for the logical link, while the ASON Tunnel option is not applicable for Uplink boards. References : Nokia Advanced Optical Network Management with NFM-T Course | Nokia, Nokia 1830 PSS-4, PSS-8, PSS-16 and PSS-32 Platforms - NATO
NEW QUESTION # 23
How are L0 and L1 resources coordinated in case of a failure in an MRN?
- A. Coordination is achieved by setting the color constraints
- B. Coordination is achieved by segregation of color and colorless LSPs
- C. Coordination is achieved by comparing the Setup Priorities
- D. Coordination is achieved by setting the WSR parameter
Answer: A
Explanation:
Explanation
Coordination of L0 and L1 resources in case of a failure in an MRN is achieved by setting the color constraints. Color constraints are used to specify which wavelengths or timeslots can be used by a given LSP request. By setting the color constraints, the NFM-T can ensure that the L0 and L1 resources are compatible and consistent across the network. For example, if an L0 LSP request requires a specific wavelength, the NFM-T can set the color constraint to match that wavelength and assign it to the L0 LSP. Similarly, if an L1 LSP request requires a specific timeslot, the NFM-T can set the color constraint to match that timeslot and assign it to the L1 LSP. This way, the coordination of L0 and L1 resources is achieved by ensuring that the same color is used by both layers. References : Nokia GMPLS-controlled Optical Networks Course | Nokia, 3.
GMPLS - Nokia
NEW QUESTION # 24
Automation is one of the key features of GMPLS. What is its main benefit?
- A. Reducing CAPEX
- B. Reducing OPEX
- C. Providing resilience against multiple failures
- D. Supporting multi-vendor networks
Answer: B
Explanation:
Explanation
Automation is one of the key features of GMPLS that allows dynamic provisioning of optical transport connections between IP routers and optical network elements2. Automation reduces the operational time and administrative overhead required to provision new connectivity, which in turn reduces the operational expenditure (OPEX) of the network. Reducing CAPEX, providing resilience against multiple failures, and supporting multi-vendor networks are not direct benefits of automation, but rather possible outcomes of using GMPLS in general. References:
* 1: Nokia GMPLS-controlled Optical Networks Course | Nokia
* 2: GMPLS - Nokia
* 3: Traffic survivability through Protection and Restoration Combined (PRC) - YouTube
* [4]: GMPLS: Architecture and Applications - Google Books
NEW QUESTION # 25
What does the SNC state with an uppercase "N" mean in a resource in NFM-T?
- A. Indicates it's currently using the Nominal resource assigned to it
- B. Indicates it's using a link other than the Nominal
- C. Indicates the nominal resource on a TE-link that is not in use
- D. Indicates if s a higher alarm state level
Answer: A
Explanation:
Explanation
The SNC state with an uppercase "N" means that the resource is currently using the nominal resource assigned to it. As explained in the previous question, a nominal resource is the default or preferred resource that is assigned to an LSP when it is created. If an LSP is using the nominal resource on a TE-link, it means that the LSP has not been rerouted or switched due to any failure or constraint violation. In this case, the SNC state of the resource will be "N", indicating that it is in use by an LSP12. References:
* 1: Nokia GMPLS-controlled Optical Networks Course | Nokia
* 2: Nokia Network Functions Manager for Transport User Guide | Nokia
NEW QUESTION # 26
What is the Commissioning File in GMRE nodes?
- A. A file with commissioned GMRE nodes for NPA implementation
- B. A control checklist for the operator
- C. A file of optical impairment parameters for power balance
- D. A file with target values that determine whether a given LSP is possible
Answer: D
Explanation:
Explanation
The Commissioning File in GMRE nodes is a file with target values that determine whether a given LSP is possible. The Commissioning File contains parameters such as power, OSNR, Q-factor, and dispersion that are used to evaluate the feasibility of an LSP request. The Commissioning File is generated by the Network Planning Application (NPA) based on the network design and optical impairments. The Commissioning File is uploaded to each GMRE node and is used by the CSPF algorithm to find a suitable path for the LSP. References : Nokia GMPLS-controlled Optical Networks Course | Nokia, Network Planning Application (NPA) | Nokia
NEW QUESTION # 27
Which provisioning steps arecommon in both CP to plain MP networks?
- A. Node creation
CPB provisioning process Node synchronization CPB power balance - B. Node creation SRG creation Node synchronization CPB power balance
- C. Node creation
CPB provisioning process Node synchronization NPA implementation - D. Node creation
CPB provisioning process Link association CPB power balance
Answer: A
Explanation:
Explanation
The provisioning steps that are common in both CP to plain MP networks are node creation, CPB provisioning process, node synchronization, and CPB power balance. These steps are required to create and commission the nodes, provision the cross-connect boards (CPBs), associate the links between the nodes, synchronize the network elements (NEs) with the NFM-T, and balance the power levels of the CPBs. References : Nokia GMPLS-controlled Optical Networks Course | Nokia, Nokia Advanced Optical Network Management with NFM-T Course | Nokia
NEW QUESTION # 28
What is a Nominal Route in a GMPLS network?
- A. The optimal path that meets TE constraints
- B. The best possible path at the moment
- C. The nominal power path
- D. The least cost path according to the routing protocol
Answer: A
Explanation:
Explanation
A Nominal Route in a GMPLS network is the optimal path that meets the Traffic Engineering (TE) constraints for a given LSP request. A Nominal Route is calculated by the NFM-T using the Constrained Shortest Path First (CSPF) algorithm, which takes into account parameters such as bandwidth, latency, priority, protection type, and other QoS attributes. A Nominal Route is stored in the NFM-T database and can be used to provision LSPs over the network. A Nominal Route can differ from the Current Route, which is the actual path that the LSP is taking at a given time, due to network changes or failures. References : Nokia GMPLS-controlled Optical Networks Course | Nokia, Nokia Advanced Optical Network Management with NFM-T Course | Nokia
NEW QUESTION # 29
Which of the following statements about the Wait for Server Restoration (WSR) parameter in the MRN is correct?
- A. When WSR is false, the LI services do not wait for the LO restoration and restore through LI switching.
- B. When WSR is true, the LO optical channel remains in the link until the failure is fixed.
- C. When WSR is true, the LO channels do not wait for the LI services to restore.
- D. When WSR is false, if the failed optical channel can be restored at LO, the data traffic stays in the tunnel.
Answer: A
Explanation:
Explanation
The Wait for Server Restoration (WSR) parameter in the MRN is a boolean parameter that determines whether an LI service should wait for the LO restoration or not in case of a failure.When WSR is false, the LI services do not wait for the LO restoration and restore through LI switching. This means that if an LO optical channel fails, the LI services that use that channel will switch to another available optical channel at LI layer without waiting for the LO layer to restore the failed channel. This option provides faster restoration time for LI services, but may result in suboptimal resource utilization at LO layer. When WSR is true, the LI services wait for the LO restoration and do not switch at LI layer. This means that if an LO optical channel fails, the LI services that use that channel will remain in that channel until the LO layer restores it or until a timeout occurs.
This option provides optimal resource utilization at LO layer, but may result in longer restoration time for LI services. References : Nokia GMPLS-controlled Optical Networks Course | Nokia, 3. GMPLS - Nokia
NEW QUESTION # 30
What is Tunnel Property Heritage?
- A. Cost, SRLG, and Color properties are propagated from HO to LO LSPs.
- B. The hierarchy tunnels cannot be nested unless they share the same properties.
- C. A restored tunnel inherits the ODUk flows.
- D. Maximum allowed bandwith is propagated from HO to LO LSPs.
Answer: A
Explanation:
Explanation
Tunnel Property Heritage is a feature of GMRE that allows the propagation of certain properties from higher order (HO) LSPs to lower order (LO) LSPs in a multi-layer network. These properties include cost, SRLG, and color. Cost is a metric that reflects the preference of using a certain link or path for routing. SRLG is a set of links that share a common risk of failure. Color is an attribute that can be used to group or filter LSPs based on service classes or customer profiles. By propagating these properties from HO to LO LSPs, GMRE can ensure that the end-to-end LSPs are consistent and optimal across different layers34. References:
* 3: Nokia GMPLS-controlled Optical Networks Course | Nokia
* 4: GMPLS - Nokia
NEW QUESTION # 31
What is the GMRE notify address?
- A. The email exchange server to notify the operators of network failures
- B. The LMP Control Channel ID. This field contains the IPv4 address of the ingress LER as a global unique identifier
- C. An IP address used to signal failures on downstream nodes upstream to the head node
- D. The OSPF-TE broadcast IP used to flood the link adjacency information
Answer: C
Explanation:
Explanation
The GMRE notify address is an IP address used to signal failures on downstream nodes upstream to the head node. The GMRE notify address is configured on each GMRE node and is used to send a Notify message to the head node when a failure occurs on a link or node alongthe LSP. The Notify message contains the failure information and the LSP ID. The head node can then initiate a restoration process based on the Notify message. References : Nokia GMPLS-controlled Optical Networks Course | Nokia, GMPLS - Nokia
NEW QUESTION # 32
What category of protocols is used by the ingress router to set up a new LSP?
- A. Link aggregation protocols
- B. Coloring protocols
- C. Link management protocols
- D. Signaling protocols
Answer: D
Explanation:
Explanation
Signaling protocols are protocols that are used by the ingress router to set up a new LSP in an MPLS network.
Signaling protocols are responsible for requesting, allocating, and releasing resources along the LSP, as well as establishing and maintaining the label bindings between the nodes. Some examples of signaling protocols are RSVP-TE, LDP, and CR-LDP34. References:
* 3: Nokia GMPLS-controlled Optical Networks Course | Nokia
* 4: MPLS Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 7.1.x - Implementing MPLS Label Distribution Protocol [Cisco IOS XR Software (End-of-Sale)] - Cisco
NEW QUESTION # 33
......
Get to the Top with 4A0-220 Practice Exam Questions: https://www.pass4surequiz.com/4A0-220-exam-quiz.html
Use Real 4A0-220 Dumps Free Sample Questions and Practice Test Engine: https://drive.google.com/open?id=13jkCVQXaU7sHCVMLr-yGxnHz4AZ0ZxT0