Huawei H12-831_V1.0テストエンジン練習テスト問題、試験問題集 [Q81-Q104]

Huawei H12-831_V1.0テストエンジン練習テスト問題、試験問題集

100%無料H12-831_V1.0日常練習試験には158問があります

Huawei H12-831_V1.0-ENU（HCIP-Datacom-Advanced Routing＆Switching Technology v1.0）認定試験は、データ通信の分野でキャリアを前進させたいネットワークエンジニアにとって不可欠な資格です。この認定を取得することにより、候補者は、高度なルーティングとスイッチングテクノロジー、および複雑なネットワークソリューションを設計および実装する能力の深い理解を示すことができます。

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質問 # 81
As shown in the figure, in a medium-sized network, BGP generally deploys dual RRs to improve R reliability. When deploying dual RRs, the ClusterIDs of the two RRs are generally set to be the same. What is the reason for this?

A. Prevent the client from receiving too many routes and causing it to run out of memory
B. prevent loops
C. Prevent RR from receiving too many routes and causing insufficient memory
D. prevent suboptimal

正解：C

質問 # 82
How many bits are there in the label field of PLS?

A. 0
B. 1
C. 2
D. 3

正解：B

質問 # 83
Which of the following are not included in the security protection actions that a secure MAC address can perform?

A. Restrict
B. Protect
C. Remark
D. Shutdown

正解：C

質問 # 84
A company consists of a head office and two branch offices, and uses MPLS VPN technology to transmit private network routes. In the networking mode of HuB&Spoke. Branches can only send and receive routes to and from the head office, and branches cannot directly send and receive routes to each other. In order to achieve the above requirements, which of the following schemes can the setting of RT be?

A. head office:Import Target: 2:2;Export Target:3:3oBranchl:Import Target:
3:3.Export Target: l:loBranch2:ImportTarget: 3:3; Export Target.2:2
B. head office:Import Target 12:3; Export Targetr 3:12OBranchl:Import Target,3:12;Export Target 12:3OBranch2:Import Target: 3:12: Export Target: 12:3
C. head office:Import Target 1:1, 2:2;Export Target: 3:3OBranchl:Import Target:3:3; Export Target: l:loBranch2:ImportTarget:3:3; Export Target:2:2
D. head officeImport Target:l:l;Export Target: 3:3OBranchl:Import
Targeta:3:3;Export Target: l:loBranch2:Import Target: 3:3; Export Target:2:2

正解：B、C

質問 # 85
In addition to virtual connections, what type of IPv6 address is the source IPv6 address of OSPFv3's Hello text?

A. IPv6anycast address
B. Global Unicast Address
C. unique local address
D. link-local address

正解：D

質問 # 86
According to this picture, what can we judge? (Multiple choice)

A. IS-IS IPv6 is enabled on GE0/0/0 of R1
B. The IS-IS interface type of the GE0/0/0 interface of R1 is Level-1-2
C. IS-IS IPv6 is not enabled on GE0/0/1 of R1
D. The IS-IS interface type of GE0/0/1 of R1 is Leve-1

正解：A、B

質問 # 87
On the OSPFv3 network shown in the figure, area 1 is a stub area, area 2 is a common area, and area 3 is an NSSA.
Which of the following LSAs is displayed only in area 2?

A. Link-LSA
B. Intra-Area-Prefix-LSA
C. Router-LSA
D. AS-External-LSA

正解：D

質問 # 88
Which of the following statements about the multicast address used by 0SPFv3 is correct?

A. All 0SPF routers use FF08: 5
B. DRThe router uses FF02::6
C. All 5PF Routers use FF02:5
D. DR routers use FF08::6

正解：B、C

質問 # 89
On the OSPFv3 network shown in the figure, OSPFv3 parameters use default values. The LSDB is checked on one of the devices. The router IDs of R1, R3, and R4 are 10.0.1.1, 10.0.3.3, and 10.0.4.4, respectively. The Origin Router part of some LSAs is hidden. Complete this part. (Tokens can be reused.)

正解：

解説：

Explanation:
LSAs and Their Origin Router Associations:
* Link-LSA: Origin Router = 10.0.1.1
* Intra-Area-Prefix-LSA: Origin Router = 10.0.4.4
* Network-LSA: Origin Router = 10.0.3.3
* Inter-Area-Prefix-LSA: Origin Router = 10.0.1.1

質問 # 90
An OSPFv3 NSSA LSA is generated by an ASBR, describes routes to a destination outside the AS, and is advertised in an NSSA.
Options:

A. FALSE
B. TRUE

正解：B

解説：
Comprehensive and Detailed In-Depth Explanation:
* OSPFv3 (for IPv6) NSSA LSA (Type 7 LSA) is used in Not-So-Stubby Areas (NSSA).
* Generated by: An ASBR (Autonomous System Boundary Router) inside the NSSA area.
* Purpose: Advertises external routes (outside the AS) inside the NSSA.
* Conversion: When the LSA reaches an ABR, it gets converted to a Type 5 External LSA before being propagated to other OSPF areas.
* Why is this needed? NSSA areas allow some external route advertisements but do not permit normal Type 5 LSAs, so they use Type 7 LSAs instead.
# Reference: HCIP-Datacom Advanced Routing & Switching Technology - OSPF NSSA LSA

質問 # 91
When MPLS is deployed in the network and the network layer protocol is IP, the route corresponding to the FEC must exist in the IP routing table of the LSR, otherwise the label forwarding entry of the FEC will not take effect.

A. True
B. False

正解：A

質問 # 92
On the network shown in the figure, IS-IS runs on R1, R2, R4, and R5, and the area ID is 49.0001. IS-IS runs on R3 and R6, and the area ID is 49.0002. The import-route isis level-2 into level-1 command is configured on R2 and R5. In AS 65000, R1, R3, R4, and R6 each establish iBGP peer relationships with R2 and R5. R2 and R5 are RR (Route Reflectors), and R1, R4, R3, and R6 are the iBGP peer relationship clients. The iBGP peer relationship ID is 10.0.0.X/32, where X is the number of the iBGP router. R1 and R4 import the external route 192.168.1.0/24 to BGP through the import-route command, and R3 and R6 import the external route
192.168.2.0/24 to BGP through the import-route command. Which of the following statements are true?

A. The routing table of R1 contains two equal-cost default routes.
B. The routing table of R1 contains the route 192.168.2.0/24.
C. The route 192.168.2.0/24 in the routing table of R4 has two different outbound interfaces.
D. The routing table of R4 contains two equal-cost default routes.

正解：B

解説：
Comprehensive and Detailed In-Depth Explanation:This question involves a complex network topology with IS-IS, iBGP, and route reflection, requiring an understanding of routing protocols, area boundaries, and route distribution. Let's analyze each statement step-by-step to determine which is true, based on HCIP-Datacom principles.
Network Overview:
* IS-IS Configuration:
* IS-IS runs on R1, R2, R4, and R5 in area 49.0001 (Level-1/Level-2).
* IS-IS runs on R3 and R6 in area 49.0002 (Level-2 only, as implied by the figure).
* The import-route isis level-2 into level-1 command on R2 and R5 allows Level-2 routes (from area 49.0002) to be injected into Level-1 routers (R1, R4) in area 49.0001.
* BGP Configuration:
* AS 65000 uses iBGP with R2 and R5 as Route Reflectors (RRs), and R1, R3, R4, and R6 as clients.
* iBGP peer relationships use IP addresses 10.0.0.X/32, where X is the router number (e.g., R1 =
10.0.0.1/32, R4 = 10.0.0.4/32, etc.).
* R1 and R4 import the external route 192.168.1.0/24 into BGP using import-route.
* R3 and R6 import the external route 192.168.2.0/24 into BGP using import-route.
* Topology Insights:
* The figure shows R2 and R5 as central hubs connecting Level-1/Level-2 IS-IS areas and serving as RRs for iBGP.
* R1 and R4 are in area 49.0001 (Level-1/Level-2), while R3 and R6 are in area 49.0002 (Level-2).
* External routes (192.168.1.0/24 and 192.168.2.0/24) are injected into BGP and distributed via iBGP.
Analyzing Each Statement:
A: The routing table of R4 contains two equal-cost default routes.
* Analysis:
* In IS-IS, default routes (0.0.0.0/0) are typically generated by Level-2 routers and propagated to Level-1 routers if configured (e.g., via default-route-advertise).
* R4 is a Level-1/Level-2 router in area 49.0001. It can learn default routes from R2 or R5 (Level-2 routers) if they advertise a default route.
* However, the question does not indicate that R2 or R5 are configured to advertise default routes, nor does it specify equal-cost paths to a default route.
* Given the import-route isis level-2 into level-1 on R2 and R5, Level-2 routes (including defaults, if any) are injected into Level-1, but there's no evidence of two equal-cost default routes in R4's routing table.
* Additionally, IS-IS prefers the closest Level-2 router for default routes, and the topology suggests a single path (e.g., via R2 or R5), not two equal-cost paths.
* Conclusion: This statement is false.
B: The route 192.168.2.0/24 in the routing table of R4 has two different outbound interfaces.
* Analysis:
* The route 192.168.2.0/24 is an external route imported into BGP by R3 and R6 (in area 49.0002) using import-route.
* As RRs, R2 and R5 reflect this route to their iBGP clients, including R4 (in area 49.0001).
* However, iBGP routes do not modify the next-hop by default unless next-hop-self is configured on the RR. The next-hop for 192.168.2.0/24 from R3/R6 would typically point to R3 or R6, not R2 or R5, unless modified.
* R4, as an iBGP client, receives the route but needs an IGP (IS-IS) path to the next-hop (R3 or R6).
* The import-route isis level-2 into level-1 on R2 and R5 allows R4 to learn IS-IS routes from area
49.0002, but the question does not indicate multiple equal-cost paths to R3 or R6 from R4.
* In IS-IS, unless explicitly configured for equal-cost multipath (ECMP) with the same cost to R3 and R6, R4 would use a single outbound interface to reach 192.168.2.0/24.
* The topology suggests a single path (e.g., via R2 or R5) to area 49.0002, not two equal-cost outbound interfaces.
* Conclusion: This statement is false.
C: The routing table of R1 contains two equal-cost default routes.
* Analysis:
* Similar to R4, R1 is a Level-1/Level-2 router in area 49.0001. It can learn default routes from R2 or R5 if they advertise them.
* The question does not specify that R2 or R5 are configured to advertise default routes, nor does it indicate multiple equal-cost paths to a default route.
* IS-IS prefers the closest Level-2 router for default routes, and the topology (with R2 and R5 as central hubs) suggests a single path, not two equal-cost paths.
* Without evidence of ECMP or specific default route configuration, R1 would not have two equal- cost default routes.
* Conclusion: This statement is false.
D: The routing table of R1 contains the route 192.168.2.0/24.
* Analysis:
* The route 192.168.2.0/24 is an external route imported into BGP by R3 and R6 (in area 49.0002) using import-route.
* R2 and R5, as Route Reflectors, reflect this iBGP route to their clients, including R1 (in area
49.0001).
* iBGP ensures that the route is propagated within AS 65000, so R1, as an iBGP client of R2 and R5, will receive the 192.168.2.0/24 route.
* For R1 to install this route in its routing table, it needs a valid IGP (IS-IS) path to the next-hop of the BGP route (likely R3 or R6).
* The import-route isis level-2 into level-1 on R2 and R5 ensures that IS-IS Level-2 routes from area 49.0002 (including paths to R3 and R6) are injected into Level-1 routers like R1.
* Therefore, R1 can resolve the next-hop for 192.168.2.0/24 via IS-IS and install the route in its routing table.
* Conclusion: This statement is true.
Final Answer and Rationale:
The only true statement is D, as R1, being an iBGP client of R2 and R5, will receive and install the
192.168.2.0/24 route in its routing table, with IS-IS providing the necessary path to the next-hop.
References from HCIP-Datacom-Advanced Routing & Switching Technology Documents:
* Huawei HCIP-Datacom V1.0 Training Manual, Chapter 4: IS-IS Configuration and Optimization, Sections on Level-1/Level-2 Interactions and Route Import.
* Huawei HCIP-Datacom V1.0 Training Manual, Chapter 5: BGP Configuration and Optimization, Sections on Route Reflection and iBGP Route Distribution.
* RFC 1195 (IS-IS) and RFC 4271 (BGP-4) for standard protocol behavior.

質問 # 93
As shown in the figure, R1, R2, R3, and R4 are in the same PLs domain, and LDP is used to distribute IPLS labels between devices.
R4 is the Egress LSR of the FEC 4.4.4.0/24. If you want to achieve R1 access 4.4.4.0/24, R4 does not need to query the label table but can know the forwarding priority of the data, then the outgoing label of R3 for the FEC should be:____. (Please fill in the Arabic numerals directly, without symbols)

正解：

解説：
(0)

質問 # 94
In an operator's MPLSVPN network, there are two devices PE1 and PE2 for MPLSVPN data forwarding. PE1 receives a private network route of 172.16.1.0/24 from the client, and converts it to a VPNv4 route on PE1 and assigns a label of 1027 Released to PE2. The outgoing label of the MPLS LSR-ID of PE2 reaching PE1 is 1025o When a client on PE2 accesses 172.16.1.0/24, the frame sent by PE2, the inner and outer labels should be a combination of the following 6 options?

A. outer layer label:1025:inner label:1027
B. Layer Label,1025:inner label:1025
C. Layer Label:1027:inner label:1025
D. outer layer label:1027:inner label:1027

正解：A

質問 # 95
In the absence of a header, the Domain ID of each OSPF process running on the router and the process ID of the process Be consistent and can be modified under the process through the domain-id command

A. False
B. True

正解：A

質問 # 96
As shown in the figure, configure a backhaul summary route 10.0.0.0/24 on the border route RT1. next hop to RT2. At the same time, the default route to the external network is configured. At this point, a routing black hole will appear. The following is about routing Is the black hole statement correct? (multiple choice)

A. Configuring black hole routing can solve the routing black hole problem
B. If the terminal in the network sends data packets to the network segment that does not appear on the internal network, a loop will occur
C. Routing black hole has no impact on the network and can be ignored
D. Precise routing $ can always avoid routing black holes

正解：A、B、D

質問 # 97
Which LSA in OSPFv3 can be flooded within an area?

A. Link-LSA
B. Inter-Area-Prefix-LSA
C. Intra-Area-Prefix-LSA
D. Inter-Area-Router-LSA

正解：C

質問 # 98
Network administrator A wants to check the neighbor status of BGP router R2. R2's BGP neighbor status information is shown in the figure. Please help network administrator A to obtain the following information: The AS where R2 is located is AS (). (Note: Only write numbers, do not add punctuation or spaces)

正解：

解説：
102

質問 # 99
If display current-configuration can reach the setting of !JIS-IS, and display saved- There is no IS-IS setting in the configuration, so that means?

A. FlashRunningIS-ISconfiguration, not saved to memory
B. nothing enteredIS-ISThe command
C. memory is runningIS-ISconfiguration, not saved toFlash
D. memory is runningIS-ISConfiguration saved toFlash

正解：C

質問 # 100
For the same MAC address, the priority of the manually configured MAC entry is higher than the automatically generated entry.

A. FALSE
B. TRUE

正解：B

質問 # 101
On the OSPFv3 network shown in the figure, area 1 is a common area. Which of the following statements are true?

A. R1, R2, and R3 generate Inter-Area-Prefix-LSAs.
B. The LSDBs of R4 and R5 are the same.
C. The LSDBs of R1, R2, and R3 are the same.
D. If R5 imports an external route, R4 does not need to rely on the Inter-Area-Router-LSA to calculate the external route.

正解：A、B

質問 # 102
To speed up the detection of link failures in an IS-IS network, you can associate IS-IS with BFD.

A. True
B. False

正解：A

質問 # 103
As shown in the figure, all interfaces of the router enable DSPF. The cost value of the link is marked in the figure. R2 The LoopbackD interface is advertised in area 1, then the cost of R1 reaching 10.2/32 is?