Updated Nov-2023 Exam 4A0-116 Dumps - Pass Your Certification Exam
Latest Real Nokia 4A0-116 Exam Dumps Questions
Nokia 4A0-116: Nokia Segment Routing Exam is a tailor-made technical certification that validates specialized knowledge and proficiency in deploying, configuring, and managing Nokia's Segment Routing architecture. 4A0-116 exam is known for demonstrating a candidate's in-depth technical understanding of Segment Routing concepts and principles, such as IGP and BGP integration, Traffic Engineering, and Network Slicing.
Nokia 4A0-116: Nokia Segment Routing exam is an assessment that tests a candidate's ability to understand and apply advanced skills and knowledge related to Segment Routing. Nokia Segment Routing Exam certification demonstrates advanced competencies in engineering, deploying, managing, and troubleshooting Segment Routing networks, making it a valuable credential for professionals seeking to advance their career in the network industry. Passing 4A0-116 exam will empower professionals with the knowledge and skills needed to excel in their day-to-day activities and advance their career in the fast-paced world of networking.
Nokia 4A0-116 certification exam covers a wide range of topics, including the basics of Segment Routing, the implementation of Segment Routing on Nokia routers, the configuration of Segment Routing policies, and the troubleshooting of common issues. It is a comprehensive exam that requires a deep understanding of the technology and its implementation in real-world scenarios.
NEW QUESTION # 13
Which of the following list of SR-TE attributes has to be advertised among routers?
- A. Administrative groups that each link belongs to, TE metric of links, bandwidth availability of each link, SRLG that each link belongs to.
- B. Administrative groups that each link belongs to, TE metric of links, bandwidth availability of each link, SRLG that each link belongs to, link status up/down.
- C. Administrative groups that each link belongs to, TE metric of links, SRLG that each link belongs to, link status up/down.
- D. Administrative groups that each link belongs to, TE metric of links, SRLG that each link belongs to.
Answer: A
Explanation:
In SR-TE, routers need to advertise certain attributes of their links to other routers in the network in order to calculate traffic-engineered paths. These attributes include:
Administrative groups that each link belongs to: This information is used to restrict the use of certain links to specific traffic types or groups.
TE metric of links: This information is used to calculate the cost of using a particular link for a traffic-engineered path.
Bandwidth availability of each link: This information is used to control the amount of traffic that can be sent over a particular link.
SRLG that each link belongs to: This information is used to avoid routing over the same physical link. Link status up/down is not needed to be advertised as it is part of the IGP protocol and is used to check the reachability of a link.
NEW QUESTION # 14
Which of the following steps is NOT required when configuring IS-IS to support Segment Routing?
- A. Enable interfaces used for Segment Routing under
- B. The Segment Routing Global Block range.
- C. The flooding scope of Segment Routing information.
- D. MPLS label range reserved for Segment Routing.
Answer: A
Explanation:
Enable interfaces used for Segment Routing under: This step is not required, enabling interfaces used for Segment Routing is not necessary as the IS-IS protocol already takes care of the flooding of the routing information.
NEW QUESTION # 15
Which of the following statements about enabling and using traffic engineering for Segment Routing is FALSE?
- A. The interfaces used for SR-TE LSPs have to be added to the MPLS context.
- B. A link attribute has to be assigned to a particular interface under the [/configure router interface] context
- C. One interface can belong to an admin group and SRLG group at the same time.
- D. Bandwidth availability as a link attribute cannot be configured.
Answer: D
Explanation:
Bandwidth availability can be configured as a link attribute in SR-TE, it is used to control the amount of traffic that can be sent over a particular link.
NEW QUESTION # 16
Which of the following is NOT a valid option to steer traffic into a flex-algo segment-routing tunnel?
- A. Configuring and applying a VSI import policy to an EVPN service and enabling the sr-is-is or sr-ospf tunnel type for the service, depending on the underlying routing protocol.
- B. Configuring and applying a VRF import policy to a VPRN service and enabling the sr-is-is or sr-ospf tunnel type for the service, depending on the underlying routing protocol.
- C. Using a flex-algo Node-SID as an explicit hop in the path definition of an SR-TE LSP and enabling the sr-te tunnel type for a VPN service.
- D. Specifying the flex-algo instance ID as an additional TE constraint for an SR-TE LSP and enabling the sr-te tunnel type for a VPN service.
Answer: A
Explanation:
Applying a VSI import policy to an EVPN service and enabling the sr-is-is or sr-ospf tunnel type for the service is not a valid option for steering traffic into a flex-algo segment-routing tunnel, VSI is not related to flex-algo SR.
NEW QUESTION # 17
Which of the following statements about a Segment Routing SID is FALSE?
- A. An Adjacency-SID does not have to be configured.
- B. A Prefix-SID can be configured directly as a label value or indirectly as an index.
- C. Adjacency-SID values are taken from the SRGB configured for the routing protocol.
- D. A Node-SID is usually associated with a router's system interface.
Answer: A
Explanation:
An Adjacency-SID does not have to be configured: this statement is not true, An Adjacency-SID is associated with a neighbor router, it is used to identify an adjacency between two routers. An Adjacency-SID must be configured to identify the adjacency.
NEW QUESTION # 18
Which of the following is NOT one of the main goals of traffic engineering?
- A. Utilizing redundant links.
- B. Defining traffic paths based on various constraints.
- C. Using the shortest possible path through the network to the destination.
- D. Avoiding potential congestion points in the network.
Answer: C
NEW QUESTION # 19
Which of the following statements about segment routing fast re-route is FALSE?
- A. Fast re-route is a temporary fix that becomes active for a short period of time after a local network failure.
- B. The parameter "max-sr-frr-labels" limits the number of labels that R-LFA can add to the data packet encapsulation.
- C. Fast re-route typically protects the active segment of a tunnel, but under certain conditions it can protect an end-to-end multi-segment tunnel instead.
- D. On a Nokia 7750 SR, R-LFA and TI-LFA can be enabled independently of each other.
Answer: D
Explanation:
On a Nokia 7750 SR, R-LFA and TI-LFA cannot be enabled independently; they must be enabled together. The parameter "max-sr-frr-labels" limits the number of labels that R-LFA can add to the data packet encapsulation.
NEW QUESTION # 20
When OSPF is used to support Segment Routing, the first byte of the link-state ID associated with each of the opaque LSAs indicates the type of information being advertised. Which of the following associations between the first-byte value and its meaning is FALSE?
- A. Value 4 - Router Info
- B. Value 8 - Extended Link Info
- C. Value 7 - SRGB Range
- D. Value 1 - Traffic Engineering
Answer: B
Explanation:
Value 8 - Extended Link Info: This statement is not true, value 8 is not used to indicate Extended Link Info. It is used for different types of information, such as Link-Local/Remote Identifiers (LLS/RLS) Identifiers and Node SID/Adj-SID.
NEW QUESTION # 21
The exhibit highlights in blue the primary path of a segment going from router S to router D.
The exhibit also shows a backup path. The protected link fails and fast re-route is triggered on router S. If the backup path has been calculated using standard LFA, how many SIDs are included in the label stack of the data packet forwarded to router R1?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION # 22
Which of the following statements about SR-TE administrative constraints is FALSE?
- A. Shared-Risk-Link Groups are only taken into account when calculating the secondary path.
- B. The head-end router may calculate a path that takes into account max hop count and bandwidth constraints.
- C. The TE metric for a link is by default the same as the IGP metric.
- D. A strict hop must be adjacent to the previous hop in the list.
Answer: A
Explanation:
Shared-Risk-Link Groups(SRLG) is taken into account when calculating both primary and secondary path to avoid routing over the same physical link.
NEW QUESTION # 23
Based on the exhibit, which of the following is a viable option for the Path Computation Element (PCE) to obtain all the necessary topology and traffic-engineering information from the network, so that it can calculate LSP paths on behalf of the PE routers?
- A. Establishing an IGP adjacency with router R2
- B. Establishing IGP adjacencies with routers R1 and R2
- C. Establishing a BGP session using the BGP-LS address family with router R3
- D. Establishing BGP sessions using the BGP-LS address family with routers R3 and R4
Answer: D
NEW QUESTION # 24
The exhibit shows the fast re-route configuration on router R1, in which both R-LFA and TI-LFA have been enabled. Assume that there are multiple potential backup paths for a given prefix. Which of the following options will router R1 use?
- A. A standard LFA path that would not coincide with the path after IGP re-convergence.
- B. An R-LFA path that would not coincide with the path after IGP re-convergence.
- C. A D-LFA path that would coincide with the path after IGP re-convergence.
- D. A D-LFA path that would not coincide with the path after IGP re-convergence.
Answer: C
Explanation:
The exhibit shows that both R-LFA and TI-LFA have been enabled on router R1. R-LFA (Remote Loop-Free Alternate) is a method that is used to protect the active segment of a tunnel, and it allows the router to find a backup path that coincides with the path that will become active after IGP reconvergence. TI-LFA (Topology Independent LFA) is a method that is used to protect an end-to-end multi-segment tunnel, it allows the router to find a backup path that does not rely on the IGP topology, but on the segment routing topology.
With R-LFA and TI-LFA enabled, router R1 will use a D-LFA (Dual-Loop-Free Alternate) path, which is a combination of both R-LFA and TI-LFA, this path will coincide with the path after IGP re-convergence.
A standard LFA, R-LFA, and D-LFA which do not coincide with the path after IGP re-convergence are not the options.
NEW QUESTION # 25
Which of the following is an advantage of enabling label stack reduction for a CSPF-calculated path, as compared to using plain CSPF?
- A. The path calculation can be delegated to an external path computation element (PCE).
- B. The routers in the calculated path can take advantage of ECMP to better distribute the traffic load.
- C. There is a larger list of traffic-engineering constraint types that can be imposed on the LSP path.
- D. The number of hops included in the end-to-end path is reduced.
Answer: D
Explanation:
Once a path is associated with an LSP, it cannot be used by other LSPs is False. A path can be used by multiple LSPs, but each LSP can have different attributes like bandwidth, priority and other constraints.
NEW QUESTION # 26
Which of the following statements about Segment Routing is FALSE?
- A. For TE-constrained tunnels, each data packet typically carries a single MPLS label to specify the tunnel path.
- B. No path signaling is required to establish an SR tunnel.
- C. A link-state IGP is required to distribute SID information.
- D. Intermediate routers do not maintain any tunnel informal
Answer: D
Explanation:
Intermediate routers do not maintain any tunnel informal: this statement is false, Intermediate routers do maintain tunnel information, such as the Forwarding Information Base (FIB) to forward the packets according to the path specified in the packets.
NEW QUESTION # 27
OSPF is being used for segment routing with traffic-engineering (SR-TE). The traffic-engineering option has been set to "sr-te false". Which of the following statements is TRUE?
- A. The TE information will only be advertised using extended-link opaque LSAs.
- B. The TE information will be advertised for all the OSPF links that have MPLS enabled.
- C. The TE information will only be advertised using application-specific sub-TLVs.
- D. The TE information will only be advertised for the OSPF links that have both MPLS and RSVP enabled.
Answer: A
Explanation:
When using Segment Routing with Traffic Engineering (SR-TE) in OSPF, the TE information is advertised using extended-link opaque LSAs. The option "sr-te false" indicates that OSPF will not advertise the TE information in the OSPF database, thus the routers will not be aware of the TE information.
NEW QUESTION # 28
Which of the following statements about the Path Computation Element (PCE) is FALSE?
- A. A stateful PCE can allow LSPs to reserve bandwidth.
- B. A stateless PCE can calculate cross-area traffic-engineering-constrained LSP paths.
- C. A stateful PCE proactively monitors all the existing LSPs and triggers the necessary repairs and re-optimizations.
- D. The PCE can obtain topology and traffic-engineering information from the network using either a link-state IGP or BGP-LS.
Answer: A
Explanation:
Stateful PCE can monitor the existing LSPs and trigger necessary repairs and re-optimizations, but it does not have the capability to reserve bandwidth.
NEW QUESTION # 29
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