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Nokia 4A0-116 certification exam covers a range of topics related to segment routing, including the basic concepts and architecture of the technology, as well as its implementation and troubleshooting. 4A0-116 exam also covers the different use cases for segment routing, including network slicing, traffic engineering, and network automation. By passing 4A0-116 exam, candidates demonstrate their ability to design, deploy, and manage segment routing solutions in real-world scenarios.
Nokia 4A0-116 exam, also known as the Nokia SRA (Segment Routing) exam, is a certification exam that is designed for IT professionals who want to validate their skills and knowledge in implementing and managing Nokia's Segment Routing technology. 4A0-116 exam is intended for those who work with Nokia's Service Router Operating System (SR OS) and are involved in designing, configuring, and troubleshooting networks using Segment Routing.
NEW QUESTION # 21
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 8 - Extended Link Info
- B. Value 4 - Router Info
- C. Value 7 - SRGB Range
- D. Value 1 - Traffic Engineering
Answer: A
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 # 22
Based upon the exhibit, which of the following statements regarding the configuration is FALSE?
- A. Traffic engineering information will only be advertised for the interfaces that have both MPLS and RSVP enabled.
- B. Adjacency-SID labels will not be advertised as they have not been defined under the physical interfaces.
- C. Traffic engineering has been enabled on this router.
- D. The Node-SID assigned to this router is the second label in the defined range.
Answer: A
NEW QUESTION # 23
Which of the following statements about primary and secondary SR-TE LSP paths is FALSE?
- A. The primary path is always preferred over a secondary pa
- B. Only one LSP path forwards the traffic at any time,
- 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 # 24
Examine the exhibit. Based upon the configuration, which routers will the LSP go through?
- A. R1, R3, R4 and R6
- B. R1, R2, R4 and R6
- C. R1, R2, R5 and R6
- D. R1, R3, R2, R5, R4 and R6
Answer: A
NEW QUESTION # 25
Which of the following statements about Multi-Protocol Label Switching networks is FALSE?
- A. An LSP is a bi-directional tunnel that uses MPLS labels to forward data.
- B. MPLS uses a signaling protocol to exchange labels between routers.
- C. The data is transparently carried from end to end.
- D. An LSR forwards data based on the MPLS labels.
Answer: C
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 # 26
Which of the following statements about a Segment Routing SID is FALSE?
- A. An Adjacency-SID does not have to be configured.
- B. Adjacency-SID values are taken from the SRGB configured for the routing protocol.
- C. A Prefix-SID can be configured directly as a label value or indirectly as an index.
- 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 # 27
OSPF type-10 Opaque LSAs can carry different types of advertisements. What type of advertisement carries a router's local 5RGB information?
- A. Extended Prefix Info
- B. Router Info
- C. Extended Link Info
- D. Traffic Engineering Info
Answer: B
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 # 28
Which of the following statements about enabling and using traffic engineering for Segment Routing is FALSE?
- A. One interface can belong to an admin group and SRLG group at the same time.
- B. Bandwidth availability as a link attribute cannot be configured.
- C. The interfaces used for SR-TE LSPs have to be added to the MPLS context.
- D. A link attribute has to be assigned to a particular interface under the [/configure router interface] context
Answer: B
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 # 29
Which of the following is NOT one of the main goals of traffic engineering?
- A. Using the shortest possible path through the network to the destination.
- B. Avoiding potential congestion points in the network.
- C. Utilizing redundant links.
- D. Defining traffic paths based on various constraints.
Answer: A
NEW QUESTION # 30
Based on the exhibit, which of the following statements about fast re-route for flex-algo instance 129 is TRUE?
- A. Only standard LFA is enabled on router R1; fast re-route is not enabled on router R2.
- B. Standard LFA and remote-LFA are enabled on router R1; standard LFA and TT-LFA are enabled on router R2.
- C. Only standard LFA is enabled on both routers R1 and R2.
- D. Standard LFA and remote-LFA are enabled on router R1; fast re-route is not enabled on router R2.
Answer: D
NEW QUESTION # 31
Which of the following is not required to be advertised by a router participating in Segment Routing?
- A. Support for SR-MPLS for IPv4 or IPv6, or SRv6
- B. SRGB when SRv6 is configured
- C. Local Node-SID
- D. Adjacency-SIDs
Answer: B
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 # 32
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, and R2 will redirect the traffic to R3 after IGP reconvergence.
- B. The head end will continue forwarding traffic to the current next-hop indefinitely, which will be discarded at the point of failure.
- C. The head end will periodically try to calculate a new path at a rate defined by the retry timer.
- D. The head end will periodically try to calculate a new path at a rate defined by the resignal timer.
Answer: B
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 # 33
Which of the following statements about Segment Routing is FALSE?
- A. Intermediate routers do not maintain any tunnel informal
- B. For TE-constrained tunnels, each data packet typically carries a single MPLS label to specify the tunnel path.
- C. A link-state IGP is required to distribute SID information.
- D. No path signaling is required to establish an SR tunnel.
Answer: A
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 # 34
In which of the following aspects does the configuration of flex-algo LSPs have an advantage over the configuration of SR-TE LSPs?
- A. Flexibility of configuring each LSP with its own set of traffic-engineering constraints
- B. Label stack size of the encapsulated data packets
- C. List of traffic-engineering constraint types available to choose from
- D. Ability to associate one primary and up to two secondary paths to the same LSP
Answer: A
Explanation:
Flex-Algo LSPs are a type of LSP that allows for greater flexibility in configuring traffic engineering constraints. This is because flex-algo LSPs can be configured with a unique set of traffic engineering constraints for each LSP, whereas SR-TE LSPs use a predefined set of traffic engineering constraints that applies to all LSPs.
Label stack size of the encapsulated data packets, List of traffic-engineering constraint types available to choose from, and Ability to associate one primary and up to two secondary paths to the same LSP are not the advantages of flex-algo LSPs over SR-TE LSPs.
NEW QUESTION # 35
Which of the following types of information is considered by a stateless PCE when it processes a new LSP path calculation request?
- A. The IGP link-state database
- B. The traffic-engineering database
- C. The operational state of existing LSP paths
- D. The amount of bandwidth reserved for each of the existing LSP paths
Answer: A
NEW QUESTION # 36
Examine the exhibit.
An LSP is being configured to start at R1 and end at R6 using local CSPF. The LSP has the following constraints. Include admin-group GREEN, use the TE metric and hop-limit 3. What routers will be included in the LSP path?
- A. R1, R5, R6
- B. R1, R6
- C. R1, R2, R4, R6
- D. R1, R3, R5, R6
Answer: D
NEW QUESTION # 37
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