[2023年07月] 問題集簡単概要4A0-116試験問題Fast2test
4A0-116トレーニング認証最新版をゲットNokia Service Routing Architect
Nokiaの4A0-116試験は、Nokia Segment Routing試験としても知られており、ITプロフェッショナルがSegment Routingテクノロジーを実装および維持する知識とスキルをテストするよう設計されています。 Nokia Segment Routingは、ネットワークアーキテクチャを簡素化し、ネットワークのスケーラビリティ、耐久性、パフォーマンスを向上させるネットワーク技術です。 Nokia 4A0-116試験は、Segment Routingアーキテクチャ、ユースケース、構成、トラブルシューティング、および移行などのトピックをカバーしています。この試験に合格したプロフェッショナルは、ネットワーキング業界で高く認められたNokia Service Routing Architects（NSRA）として認定されます。
ノキア4A0-116試験は、ネットワーキング業界で働くプロフェッショナルにとって重要な認定試験であり、セグメントルーティングネットワークを設計、展開、管理するために必要な知識やスキルを提供します。また、雇用主にとっても貴重な資産であり、セグメントルーティング技術に関連する課題を対処できるプロフェッショナルを見つけて採用することができます。
質問 # 11
Which of the following types of information is considered by a stateless PCE when it processes a new LSP path calculation request?
- A. The amount of bandwidth reserved for each of the existing LSP paths
- B. The operational state of existing LSP paths
- C. The IGP link-state database
- D. The traffic-engineering database
正解：C
質問 # 12
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
正解：D
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 # 13
In the context of a network that includes a Path Computation Element (PCE), what is a PCC-initiated LSP?
- A. An LSP for which the path repairs and re-optimizations must be triggered by the head-end router.
- B. An LSP for which the initial path is calculated by the head-end router.
- C. An LSP whose existence and state are reported to the PCE.
- D. An LSP that needs to be explicitly configured on the head-end router.
正解：C
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 # 14
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 routers in the calculated path can take advantage of ECMP to better distribute the traffic load.
- C. The path calculation can be delegated to an external path computation element (PCE).
- D. The number of hops included in the end-to-end path is reduced.
正解：D
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 # 15
Which of the following statements about path definitions is FALSE?
- A. A loose hop is one that does not have to be directly adjacent to the previous hop in the path list
- B. The path hops can be defined by either the system or physical interface IP address.
- C. In addition to the hops defined in the path list, the head-end and tail-end routers are implicitly added.
- D. Once a path is associated with an LSP, it cannot be used by other LSPs.
正解：B
質問 # 16
The exhibit presents packets being transmitted inside an LSP's multi-segment primary path going from router R1 to router R8. The LSP also has a standby secondary path, and Seamless-BFD has been enabled on the primary path. The link between routers R1 and R2 fails, and fast re-route (FRR) is triggered. As a result, router R1 forwards the packets to router R3 and adds the proper FRR encapsulation to reach which router?
- A. To reach router R2, which is the LSP's intended next-hop.
- B. To reach router R8, which is the tail-end of the LSP.
- C. To reach router R4, which is the tail-end of the active segment.
- D. To reach router R5, which is the shortest way to go back to the original path.
正解：D
質問 # 17
Based upon the exhibit, which of the following statements regarding the configuration is FALSE?
- A. Traffic engineering has been enabled on this router.
- B. Adjacency-SID labels will not be advertised as they have not been defined under the physical interfaces.
- C. Traffic engineering information will only be advertised for the interfaces that have both MPLS and RSVP enabled.
- D. The Node-SID assigned to this router is the second label in the defined range.
正解：C
質問 # 18
Which of the following statements about SR-TE administrative constraints is FALSE?
- A. The head-end router may calculate a path that takes into account max hop count and bandwidth constraints.
- B. The TE metric for a link is by default the same as the IGP metric.
- C. A strict hop must be adjacent to the previous hop in the list.
- D. Shared-Risk-Link Groups are only taken into account when calculating the secondary path.
正解：D
解説：
Shared-Risk-Link Groups(SRLG) is taken into account when calculating both primary and secondary path to avoid routing over the same physical link.
質問 # 19
Which of the following statements about a Segment Routing SID is FALSE?
- A. A router advertises its local Node-SID as a local SRGB and an index only if it is configured as an index.
- B. A local Node-SID can be configured as an index.
- C. A local Node-SID can be configured directly as an MPLS label.
- D. All routers do NOT need to have the same SRGB range configured.
正解：A
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 # 20
OSPF type-10 Opaque LSAs can carry different types of advertisements. What type of advertisement carries a router's local 5RGB information?
- A. Router Info
- B. Traffic Engineering Info
- C. Extended Link Info
- D. Extended Prefix Info
正解：A
解説：
This type of advertisement carries a router's local SRGB information, which is used to distribute information about the local SID allocation range
質問 # 21
Based on the configuration shown for routers R1 and R10, what valid flex-algo definitions exist in the network?
- A. No valid flex-algo definitions, because of the conflicting parameters.
- B. One valid flex-algo definition, using delay as the link metric and including green links.
- C. Two valid flex-algo definitions, one uses te-metric as the link metric and includes blue links and the other uses delay as the link met includes green links.
- D. One valid flex-algo definition, using te-metric as the link metric and including blue links.
正解：C
質問 # 22
Which of the following statements about the Path Computation Element (PCE) is FALSE?
- A. A stateful PCE proactively monitors all the existing LSPs and triggers the necessary repairs and re-optimizations.
- B. A stateful PCE can allow LSPs to reserve bandwidth.
- C. The PCE can obtain topology and traffic-engineering information from the network using either a link-state IGP or BGP-LS.
- D. A stateless PCE can calculate cross-area traffic-engineering-constrained LSP paths.
正解：B
解説：
Stateful PCE can monitor the existing LSPs and trigger necessary repairs and re-optimizations, but it does not have the capability to reserve bandwidth.
質問 # 23
Which of the following steps is NOT required when configuring IS-IS to support Segment Routing?
- A. The Segment Routing Global Block range.
- B. The flooding scope of Segment Routing information.
- C. Enable interfaces used for Segment Routing under
- D. MPLS label range reserved for Segment Routing.
正解：C
解説：
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.
質問 # 24
Which of the following is NOT a valid option to steer traffic into a flex-algo segment-routing tunnel?
- A. 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.
- B. 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.
- C. 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.
- 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.
正解：C
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 # 25
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 four different admin groups.
- D. The interface belongs to admin group RED, configured with a value of 17.
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 # 26
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
正解：B
解説：
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.
質問 # 27
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