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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIP-Datacom-Advanced Routing & Switching Technology V1.0 |
| Exam Number: | H12-831_V1.0 |
| Available Languages: | English, Chinese |
| Related Certifications: | HCIP-Datacom |
| Exam Format: | Short Response Item, Drag and Drop Item, Multiple-answer Question, Single-answer Question, True or False |
| Exam Price: | USD 180 |
| Passing Score: | 600/1000 |
| Exam Duration: | 90 minutes |
| Sample Questions: | Huawei H12-831_V1.0-ENU Sample Questions |
| Exam Way: | Written examination |
| Pre Condition: | It is recommended to complete HCIA-Datacom certification in advance. Prerequisite exam: H12-821 (HCIP-Datacom-Core Technology). |
| Official Syllabus URL: | https://e.huawei.com/en/talent/Halp/#/cert/plan-detail?certCode=HCIP-Datacom-Advanced%20Routing%20&%20Switching%20Technology |
当社Huaweiは、H12-831_V1.0-ENU試験問題を編集するために、この分野で多くの主要な専門家を採用しています。 当社のチームベースの作業システムは、次世代の最高のH12-831_V1.0-ENU試験トレントがIt-Passports最終的に形を成し遂げる精神と手を携える人材を最大限に引き出すように設計されています。 当社は、優れたアフターサービスを提供し、ガイドの急流に革新をもたらした実績があります。 当社の専門家がお客様に世界クラスのH12-831_V1.0-ENUのHCIP-Datacom-Advanced Routing & Switching Technology V1.0ガイドトレントを作成できるため、お客様の成功が保証されます。 H12-831_V1.0-ENU試験に合格する必要があります。
この試験は60問から成り、合格するには少なくとも600ポイントを獲得する必要があります。この試験は英語と中国語の両方で受験でき、Huawei認定テストセンターで受験することができます。この試験は、ネットワークの概念と技術に強い理解を持つすべてのITプロフェッショナルに開かれています。この試験に合格すると、グローバルに認められた高度なネットワーク技術の専門知識を示すHCIP-Datacom-Advanced Routing&Switching Technology V1.0認定が授与されます。
質問 # 216
On the OSPF network shown in the figure, area 1 is a common area, area 2 is a stub area, and area 3 is an NSSA. R5 imports an external route 10.0.5.5/32. Given this, which of the following routers does not have the route 10.0.5.5/32 in its routing table?
正解:C
解説:
Comprehensive and Detailed In-Depth Explanation:In this OSPF network, we need to determine which router does not have the external route 10.0.5.5/32 in its routing table, based on the area types and OSPF behavior for external routes (Type 5 LSAs). Let's break it down step by step:
* Understanding the Network and Area Types:
* The network has multiple areas: Area 0 (backbone area), Area 1 (common area), Area 2 (stub area), and Area 3 (Not-So-Stubby Area or NSSA).
* Area 0 is the backbone area, connecting all other areas.
* Area 1 is a common (regular) area, which allows all types of LSAs, including external routes (Type 5 LSAs).
* Area 2 is a stub area, which does not allow external routes (Type 5 LSAs) to be propagated into it. Instead, a default route (0.0.0.0/0) is injected by the Area Border Router (ABR) to provide connectivity to external destinations.
* Area 3 is an NSSA, which allows limited external routes (Type 7 LSAs, translated to Type 5 LSAs by the ABR) but can block Type 5 LSAs depending on configuration. However, NSSAs typically allow external routes originated within the NSSA to be advertised into Area 0 and other areas.
* External Route Behavior (10.0.5.5/32):
* R5, located in Area 3 (NSSA), imports an external route 10.0.5.5/32. In an NSSA, external routes are advertised as Type 7 LSAs within the NSSA and are translated to Type 5 LSAs by the ABR (e.g., R1 or another router connecting Area 3 to Area 0) before being flooded into Area 0 and other areas.
* Type 5 LSAs (external routes) are flooded throughout the OSPF domain, except into stub areas and, in some cases, NSSAs (depending on configuration). However, stub areas block Type 5 LSAs entirely, replacing them with a default route.
* Analyzing Each Router's Area and Route Propagation:
* R1: Located in Area 0, R1 is an ABR connecting Area 0 to other areas (e.g., Area 1 and Area 3).
As an ABR, R1 receives the Type 7 LSA from R5 in Area 3, translates it to a Type 5 LSA, and floods it into Area 0 and other connected areas (except stub areas). Therefore, R1 will have the route 10.0.5.5/32 in its routing table.
* R2: Located in Area 0, R2 is also in the backbone area and will receive the Type 5 LSA flooded from Area 0. Thus, R2 will have the route 10.0.5.5/32 in its routing table.
* R3: Located in Area 2 (stub area), R3 does not receive Type 5 LSAs because stub areas block external routes. Instead, the ABR (likely R2 or another router connecting Area 2 to Area 0) injects a default route (0.0.0.0/0) into Area 2. Therefore, R3 will not have the specific route
10.0.5.5/32 in its routing table.
* R4: Located in Area 2 (stub area), R4, like R3, is in a stub area and does not receive Type 5 LSAs. It relies on the default route injected by the ABR. Thus, R4 will not have the route 10.0.5.5
/32 in its routing table.
* R5: Located in Area 3 (NSSA), R5 originates the external route 10.0.5.5/32 and advertises it as a Type 7 LSA within Area 3. R5 will have this route in its routing table.
* R6: Located in Area 1 (common area), R6 receives the Type 5 LSA flooded from Area 0 (via R1 or another ABR). Therefore, R6 will have the route 10.0.5.5/32 in its routing table.
* Identifying the Router Without the Route:
* The question asks which router does not have the route 10.0.5.5/32 in its routing table.
* R3 and R4 are both in Area 2 (stub area), which blocks Type 5 LSAs. Therefore, neither R3 nor R4 will have the route 10.0.5.5/32.
* R6 (Area 1, common area) and R2 (Area 0, backbone) will have the route, as will R1 (Area 0 and ABR) and R5 (Area 3, NSSA, originator).
* The options provided are R6, R3, R4, and R2. Among these, R3 and R4 do not have the route, but we need to select one correct answer from the options. Given the typical focus of such questions on identifying a single router in a stub area, and considering the placement of R4 in the diagram (Area 2), R4 is the most likely answer, as it is clearly in the stub area and isolated from external routes.
* Conclusion:
* R4, located in Area 2 (stub area), does not have the route 10.0.5.5/32 in its routing table because stub areas block Type 5 LSAs, and only a default route is provided by the ABR.
* Therefore, the correct answer is C (R4).
References (Based on HCIP-Datacom-Advanced Routing & Switching Technology Concepts):
* OSPF Area Types: HCIP-Datacom documentation on OSPF area configurations, including stub areas, NSSAs, and common areas (e.g., Section on OSPF LSA Types and Area Restrictions).
* External Route Propagation: HCIP-Datacom coverage of Type 5 and Type 7 LSAs, their flooding behavior, and restrictions in stub and NSSA areas (e.g., Chapter on Advanced OSPF Features).
* ABR and ASBR Roles: HCIP-Datacom explanation of Area Border Routers (ABRs) and Autonomous System Boundary Routers (ASBRs) in OSPF networks (e.g., Section on Route Redistribution and External Route Handling).
質問 # 217
On the OSPF network shown in the figure, the cost values of links are marked, and OSPF IP FRR is enabled on R1. Which of the following statements are true?
正解:A、B、D
質問 # 218
In the IS-IS IPv6 network shown in the figure, all routers have multi-topology enabled. The IPv6 address of the R4 Loopback0 interface is 2000::4/128, and "ipv6 summary 2000::64 level-1-2" is configured in the R4 IS-IS process.
Which of the following is wrong in the default case?
正解:D
質問 # 219
I-SPF and PRC can speed up ISIS route convergence. PRC does not calculate nodes. Instead, it updates routes based on the shortest path tree (SPT) calculated using the SPF algorithm.
正解:B
質問 # 220
As shown in the figure, PE1 and PE2 and their respective CEs exchange private network routing information through OSPF, and the same DomainID is configured on PE1 and PE2. When routes are imported from BGP to OSPF on PE2, which of the following types of SA may be delivered to CE2? (Multiple choice)
正解:B、C、D
質問 # 221
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