[2023] 4A0-116 Exam Dumps, Test Engine Practice Test Questions
Pass 4A0-116 exam [Sep 11, 2023] Updated 42 Questions
Nokia 4A0-116 exam covers a wide range of topics related to Nokia’s Segment Routing technology. These topics include network design, implementation, configuration, and troubleshooting of Nokia’s Segment Routing solution. 4A0-116 exam is designed to test the candidate’s ability to apply their knowledge and skills to real-world scenarios and to solve complex problems related to Nokia’s Segment Routing technology.
Nokia 4A0-116 Certification Exam is a globally recognized certification program designed for network engineers and professionals who specialize in Nokia Segment Routing. Nokia Segment Routing Exam certification exam provides a comprehensive understanding of Nokia's Segment Routing technology, which is an innovative and scalable approach to network routing. Nokia 4A0-116 certification is essential for network professionals who want to demonstrate their expertise in implementing, managing, and troubleshooting Segment Routing networks.
NEW QUESTION # 17
For any of the LFA methods to work properly, there must be a router in the backup path that will forward traffic addressed to the destination without sending it back to the source. Which of the following statements describes the way R-LFA selects such a router?
- A. It selects a remote router, reachable through a tunnel defined by a single Node-SID.
- B. It can select an immediate neighbor or a remote router, as long as the backup path coincides with the path that will become active after IGP reconvergence.
- C. It selects an immediate neighbor.
- D. It selects a remote router, reachable through a tunnel defined by a Node-SID and one or two Adjacency-SIDs.
Answer: B
Explanation:
R-LFA (Remote Loop-Free Alternate) is a method that can select either an immediate neighbor or a remote router to be used as a backup next hop, as long as the backup path coincides with the path that will become active after IGP reconvergence.
NEW QUESTION # 18
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, SRLG that each link belongs to.
- B. Administrative groups that each link belongs to, TE metric of links, SRLG that each link belongs to, link status up/down.
- C. Administrative groups that each link belongs to, TE metric of links, bandwidth availability of each link, SRLG that each link belongs to.
- D. 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.
Answer: C
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 # 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. 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.
- C. On a Nokia 7750 SR, R-LFA and TI-LFA can be enabled independently of each other.
- D. The parameter "max-sr-frr-labels" limits the number of labels that R-LFA can add to the data packet encapsulation.
Answer: C
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
OSPF type-10 Opaque LSAs can carry different types of advertisements. What type of advertisement carries a router's local 5RGB information?
- A. Traffic Engineering Info
- B. Extended Prefix Info
- C. Router Info
- D. Extended Link Info
Answer: C
Explanation:
This type of advertisement carries a router's local SRGB information, which is used to distribute information about the local SID allocation range
NEW QUESTION # 21
Which of the following statements about primary and secondary SR-TE LSP paths is FALSE?
- A. Only one LSP path forwards the traffic at any time,
- B. The primary path is always preferred over a secondary pa
- C. Up to three paths can be configured for a given SR-TE LS
- D. Preference values can be configured for non-standby secondary paths.
Answer: C
Explanation:
Typically, in SR-TE, only two paths can be configured for a given SR-TE LSP: primary path and secondary path. The primary path is used for normal traffic forwarding, and the secondary path is used as a backup in case the primary path fails. Only one LSP path forwards the traffic at any time.
NEW QUESTION # 22
Which of the following statements about Multi-Protocol Label Switching networks is FALSE?
- A. The data is transparently carried from end to end.
- B. MPLS uses a signaling protocol to exchange labels between routers.
- C. An LSP is a bi-directional tunnel that uses MPLS labels to forward data.
- D. An LSR forwards data based on the MPLS labels.
Answer: A
Explanation:
The data is transparently carried from end to end: This statement is not true, MPLS does not provide data transparency, which means that the data is not carried unmodified from end to end. MPLS uses labels to forward data, so the original IP packets are encapsulated in new MPLS packets, and the original IP headers are not visible at the egress LSR.
NEW QUESTION # 23
Which of the following is not required to be advertised by a router participating in Segment Routing?
- A. SRGB when SRv6 is configured
- B. Support for SR-MPLS for IPv4 or IPv6, or SRv6
- C. Adjacency-SIDs
- D. Local Node-SID
Answer: A
Explanation:
SRGB when SRv6 is configured: This is not required to be advertised, SRGB(Segment Routing Global Block) is only used for SR-MPLS and is not needed when SRv6 is configured. Instead, SRv6 uses the IANA-assigned IPv6 address space.
NEW QUESTION # 24
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: B
NEW QUESTION # 25
Which of the following statements about enabling and using traffic engineering for Segment Routing is FALSE?
- A. Bandwidth availability as a link attribute cannot be configured.
- B. One interface can belong to an admin group and SRLG group at the same time.
- C. A link attribute has to be assigned to a particular interface under the [/configure router interface] context
- D. The interfaces used for SR-TE LSPs have to be added to the MPLS context.
Answer: A
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 # 26
Which of the following statements about SR-TE administrative constraints is FALSE?
- A. A strict hop must be adjacent to the previous hop in the list.
- B. The head-end router may calculate a path that takes into account max hop count and bandwidth constraints.
- C. Shared-Risk-Link Groups are only taken into account when calculating the secondary path.
- D. The TE metric for a link is by default the same as the IGP metric.
Answer: C
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 # 27
Which of the following is NOT one of the main goals of traffic engineering?
- A. Utilizing redundant links.
- B. Avoiding potential congestion points in the network.
- C. Defining traffic paths based on various constraints.
- D. Using the shortest possible path through the network to the destination.
Answer: D
NEW QUESTION # 28
An SR-TE LSP with a path definition that includes router R4 as a loose hop and for which Seamless-BFD has been enabled is following the path shown in the exhibit. What happens after router R4 fails if the routers along the path follow the default behavior?
- A. The head end will continue forwarding traffic to the current next-hop indefinitely, which will be discarded at the point of failure.
- B. The head end will periodically try to calculate a new path at a rate defined by the retry timer.
- C. The head end will continue forwarding traffic to the current next-hop indefinitely, and R2 will redirect the traffic to R3 after IGP reconvergence.
- D. The head end will periodically try to calculate a new path at a rate defined by the resignal timer.
Answer: A
Explanation:
When an SR-TE LSP with Seamless-BFD enabled, the BFD sessions are established between the routers along the path to detect any failures quickly. If a failure happens in the path, the router will stop forwarding the traffic and send a BFD control packet to the head-end router. In this case, R4 failed, BFD sessions will detect the failure and send a message to the head-end router, but since R4 is a loose hop, the path doesn't have to be re-calculate. The head-end router will continue forwarding traffic to the current next-hop, R2, which will be discarded at the point of failure (R4) as it doesn't know about the failure. And the traffic will not be redirected to R3 after IGP reconvergence.
NEW QUESTION # 29
Which of the following statements about a Segment Routing SID is FALSE?
- A. A Prefix-SID can be configured directly as a label value or indirectly as an index.
- B. Adjacency-SID values are taken from the SRGB configured for the routing protocol.
- C. An Adjacency-SID does not have to be configured.
- D. A Node-SID is usually associated with a router's system interface.
Answer: C
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 # 30
Which of the following statements about a Segment Routing SID is FALSE?
- A. A Prefix-SID can be configured directly as a label value or indirectly as an index.
- B. Adjacency-SID values are taken from the SRGB configured for the routing protocol.
- C. An Adjacency-SID does not have to be configured.
- D. A Node-SID is usually associated with a router's system interface.
Answer: C
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 # 31
Which of the following is NOT an advantage of using a PCE for the computation of TE-constrained LSP paths, as compared to using CSPF locally on the PE router?
- A. The ability to create LSP paths with bandwidth reservation
- B. The ability to ensure that some LSP paths are disjoint
- C. The ability to create LSPs with primary and secondary paths
- D. The ability to create cross-area TE-constrained LSP paths
Answer: A
Explanation:
PCE does not have the capability to reserve bandwidth, This is a function of a Resource Reservation Protocol (RSVP) or a Label Distribution Protocol (LDP) and is done locally on the PE.
PCE can have advantages such as:
The ability to create cross-area TE-constrained LSP paths
The ability to create LSPs with primary and secondary paths
The ability to ensure that some LSP paths are disjoint
it can be used to optimize the path computation by centralizing the path calculation and by taking into account a global view of the network.
NEW QUESTION # 32
Which of the following statements about Segment Routing is FALSE?
- A. A link-state IGP is required to distribute SID information.
- B. For TE-constrained tunnels, each data packet typically carries a single MPLS label to specify the tunnel path.
- C. No path signaling is required to establish an SR tunnel.
- 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 # 33
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Nokia 4A0-116 certification exam is an excellent opportunity for professionals to enhance their skills and advance their careers in the networking industry. Nokia is a respected name in the telecommunications industry, and this certification demonstrates a high level of proficiency in segment routing. Additionally, the certification can open up new career opportunities, as companies continue to adopt segment routing to improve their network performance and efficiency. Overall, the Nokia 4A0-116 certification exam is a valuable credential for anyone looking to specialize in segment routing and advance their career in the field of networking.
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