無料提供される4A0-116問題集と4A0-116リアル試験問題
Nokia 4A0-116実際の問題とブレーン問題集
Nokia SRA認定を取得することは、ネットワークエンジニアリングまたは電気通信のキャリアを進めたいITプロフェッショナルにとって貴重な資産になり得ます。この認定は、候補者がNokiaのSegment Routingテクノロジーに包括的な理解を持ち、このテクノロジーを使用してネットワークを設計、展開、管理するために必要なスキルと知識を備えていることを証明します。また、競争の激しい求人市場でITプロフェッショナルが目立つことや収入の向上にも役立つことがあります。
Nokia 4A0-116 認定試験は、IPネットワークでセグメントルーティングの原則、概念、および実装を含むさまざまな側面をカバーしています。試験はまた、Nokiaネットワークでのセグメントルーティングの設定とトラブルシューティングもカバーしており、Nokiaネットワークエンジニアにとって必須の認定資格となっています。
質問 # 24
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, link status up/down.
- B. Administrative groups that each link belongs to, TE metric of links, SRLG that each link belongs to.
- 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.
正解：C
解説：
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.
質問 # 25
Which of the following statements about SR-TE administrative constraints is FALSE?
- A. The TE metric for a link is by default the same as the IGP metric.
- B. Shared-Risk-Link Groups are only taken into account when calculating the secondary path.
- C. The head-end router may calculate a path that takes into account max hop count and bandwidth constraints.
- D. A strict hop must be adjacent to the previous hop in the list.
正解：B
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 # 26
Based on the exhibit, and given that the system IP address of router RIO is 10.10.10.10, which of the following statements is FALSE?
- A. Router Rl participates in at least two flex-algo instances.
- B. The underlying routing protocol being used in the network for segment routing is IS-IS.
- C. The Node-SID assigned to router RIO for flex-algo instance 129 is 524338.
- D. Router RIO participates in flex-algo instance 130.
正解：C
質問 # 27
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. Traffic engineering has been enabled on this router.
- C. Adjacency-SID labels will not be advertised as they have not been defined under the physical interfaces.
- D. The Node-SID assigned to this router is the second label in the defined range.
正解：A
質問 # 28
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. One interface can belong to an admin group and SRLG group at the same time.
- C. Bandwidth availability as a link attribute cannot be configured.
- D. A link attribute has to be assigned to a particular interface under the [/configure router interface] context
正解：C
解説：
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.
質問 # 29
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 continue forwarding traffic to the current next-hop indefinitely, and R2 will redirect the traffic to R3 after IGP reconvergence.
- C. The head end will periodically try to calculate a new path at a rate defined by the resignal timer.
- D. The head end will periodically try to calculate a new path at a rate defined by the retry timer.
正解：A
解説：
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.
質問 # 30
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. Flexibility of configuring each LSP with its own set of traffic-engineering constraints
- C. Label stack size of the encapsulated data packets
- D. Ability to associate one primary and up to two secondary paths to the same LSP
正解：B
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 # 31
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 four different admin groups.
- B. The interface belongs to two different admin groups.
- C. The interface belongs to three different admin groups.
- D. The interface belongs to admin group RED, configured with a value of 17.
正解：B
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 # 32
Which of the following statements about Multi-Protocol Label Switching networks is FALSE?
- A. The data is transparently carried from end to end.
- B. An LSR forwards data based on the MPLS labels.
- C. An LSP is a bi-directional tunnel that uses MPLS labels to forward data.
- D. MPLS uses a signaling protocol to exchange labels between routers.
正解：A
解説：
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.
質問 # 33
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 7 - SRGB Range
- C. Value 4 - Router Info
- 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 # 34
Which of the following is not required to be advertised by a router participating in Segment Routing?
- A. SRGB when SRv6 is configured
- B. Local Node-SID
- C. Adjacency-SIDs
- D. Support for SR-MPLS for IPv4 or IPv6, or SRv6
正解：A
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 # 35
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 # 36
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. Intermediate routers do not maintain any tunnel informal
- C. No path signaling is required to establish an SR tunnel.
- D. A link-state IGP is required to distribute SID information.
正解：B
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 # 37
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 cross-area TE-constrained LSP paths
- B. The ability to create LSP paths with bandwidth reservation
- C. The ability to create LSPs with primary and secondary paths
- D. The ability to ensure that some LSP paths are disjoint
正解：B
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 # 38
Based on the exhibit, which of the following statements about fast re-route for flex-algo instance 129 is TRUE?
- A. Standard LFA and remote-LFA are enabled on router R1; fast re-route is not enabled on router R2.
- B. Only standard LFA is enabled on router R1; fast re-route is not enabled on router R2.
- C. Standard LFA and remote-LFA are enabled on router R1; standard LFA and TT-LFA are enabled on router R2.
- D. Only standard LFA is enabled on both routers R1 and R2.
正解：A
質問 # 39
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