あなたを合格させる4A0-116試験問題集で使おう（更新された42問があります)
4A0-116試験問題集でNokia練習テスト問題
Nokia 4A0-116認定試験は、Nokiaのセグメントルーティングテクノロジーを扱うIT専門家にとって貴重な資格です。このテクノロジーの実装、構成、トラブルシューティングにおける個人の知識とスキルを実証し、ネットワーキングと通信の分野でのキャリアを向上させるのに役立ちます。適切な準備とリソースにより、候補者はこの試験に合格し、ノキアセグメントルーティングの認定専門家になることができます。
質問 # 18
In which of the following aspects does the configuration of flex-algo LSPs have an advantage over the configuration of SR-TE LSPs?
- A. List of traffic-engineering constraint types available to choose from
- B. Label stack size of the encapsulated data packets
- C. Ability to associate one primary and up to two secondary paths to the same LSP
- D. Flexibility of configuring each LSP with its own set of traffic-engineering constraints
正解：D
解説：
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.
質問 # 19
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 LSPs with primary and secondary paths
- B. The ability to ensure that some LSP paths are disjoint
- C. The ability to create cross-area TE-constrained LSP paths
- D. The ability to create LSP paths with bandwidth reservation
正解：D
解説：
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.
質問 # 20
A router participating in SR-TE is advertising a value of Ox11 for the admin-group membership of one of its interfaces. Which of the following statements is TRUE?
- A. The interface belongs to two different admin groups.
- B. The interface belongs to three different admin groups.
- C. The interface belongs to admin group RED, configured with a value of 17.
- D. The interface belongs to four different admin groups.
正解：A
解説：
In SR-TE, the admin-group is represented by a 32-bit value, where each bit represents a different admin-group. The value Ox11 in binary is 000100010001, which has two bits set to 1, indicating that the interface belongs to two different admin groups. The exact admin-groups that the interface belongs to depends on how the admin-groups have been configured on the router.
質問 # 21
Which of the following is an advantage of enabling label stack reduction for a CSPF-calculated path, as compared to using plain CSPF?
- A. There is a larger list of traffic-engineering constraint types that can be imposed on the LSP path.
- B. The number of hops included in the end-to-end path is reduced.
- C. The routers in the calculated path can take advantage of ECMP to better distribute the traffic load.
- D. The path calculation can be delegated to an external path computation element (PCE).
正解：B
解説：
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.
質問 # 22
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.
正解：A
解説：
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.
質問 # 23
Which of the following statements about segment routing fast re-route is FALSE?
- A. 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.
- B. Fast re-route is a temporary fix that becomes active for a short period of time after a local network failure.
- C. The parameter "max-sr-frr-labels" limits the number of labels that R-LFA can add to the data packet encapsulation.
- D. On a Nokia 7750 SR, R-LFA and TI-LFA can be enabled independently of each other.
正解：D
解説：
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.
質問 # 24
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 application-specific sub-TLVs.
- B. The TE information will only be advertised using extended-link opaque LSAs.
- C. The TE information will be advertised for all the OSPF links that have MPLS enabled.
- D. The TE information will only be advertised for the OSPF links that have both MPLS and RSVP enabled.
正解：B
解説：
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.
質問 # 25
In the context of a network that includes a Path Computation Element (PCE), what is a PCC-initiated LSP?
- A. An LSP that needs to be explicitly configured on the head-end router.
- B. An LSP for which the initial path is calculated by the head-end router.
- C. An LSP for which the path repairs and re-optimizations must be triggered by the head-end router.
- D. An LSP whose existence and state are reported to the PCE.
正解：D
解説：
A PCC-initiated LSP is an LSP that is established and controlled by the PCC (Path Computation Client) which is typically a head-end router. The PCC sends LSP setup and teardown requests to the PCE and also reports the existence and state of the LSPs to the PCE. The PCE then uses this information to perform path computation and to monitor the state of the LSPs.
質問 # 26
Which of the following statements about primary and secondary SR-TE LSP paths is FALSE?
- A. Preference values can be configured for non-standby secondary paths.
- B. Only one LSP path forwards the traffic at any time,
- C. The primary path is always preferred over a secondary pa
- D. Up to three paths can be configured for a given SR-TE LS
正解：D
解説：
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.
質問 # 27
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
正解：A
解説：
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.
質問 # 28
Which of the following statements about the operation of seamless-BFD is FALSE?
- A. A seamless-BFD template needs to be configured on the head-end of the LSP.
- B. The routing protocol (OSPF or IS-IS) is used to carry the reflector discriminator information.
- C. Seamless-BFD responses are sent back using the LSP label stack.
- D. To be able to respond to seamless-BFD messages, a router must be configured as a reflector.
正解：C
解説：
Seamless-BFD is a mechanism that allows the detection of faults in MPLS LSPs more quickly by using BFD (Bidirectional Forwarding Detection) protocol. Seamless-BFD responses are sent back using the MPLS data-plane, not the LSP label stack.
質問 # 29
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 D-LFA path that would 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 not coincide with the path after IGP re-convergence.
- D. A standard LFA path that would not coincide with the path after IGP re-convergence.
正解：A
解説：
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.
質問 # 30
Based upon the exhibit, which of the following statements regarding the configuration is FALSE?
- A. The Node-SID assigned to this router is the second label in the defined range.
- B. Traffic engineering information will only be advertised for the interfaces that have both MPLS and RSVP enabled.
- C. Adjacency-SID labels will not be advertised as they have not been defined under the physical interfaces.
- D. Traffic engineering has been enabled on this router.
正解：B
質問 # 31
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. A Node-SID is usually associated with a router's system interface.
- D. An Adjacency-SID does not have to be configured.
正解：D
解説：
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.
質問 # 32
Which of the following statements about a Segment Routing SID is FALSE?
- A. A local Node-SID can be configured as an index.
- B. A local Node-SID can be configured directly as an MPLS label.
- C. A router advertises its local Node-SID as a local SRGB and an index only if it is configured as an index.
- D. All routers do NOT need to have the same SRGB range configured.
正解：C
解説：
A router advertises its local Node-SID as a local SRGB and an index only if it is configured as an index: This statement is not true, A router will advertise its local Node-SID as a local SRGB and an index, whether it is configured as an index or not.
質問 # 33
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. 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.
- 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. 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.
正解：A
解説：
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.
質問 # 34
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Nokia 4A0-116試験は、Nokiaセグメントルーティングに焦点を当てた認定テストです。これは、最新の通信ネットワークの運用を成功させるために重要な高度に専門的な領域です。この試験は、この分野で働く専門家の知識とスキルをテストするように設計されており、専門知識を実証することでキャリアを促進しようとしている専門家です。
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