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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIE-Datacom V1.0 (Written Exam) |
| Exam Number: | H12-891_V1.0 |
| Available Languages: | Chinese, English |
| Passing Score: | 600/1000 |
| Exam Format: | Multiple-choice, Single-choice, Fill-in-the-blank, True/false, Drag-and-drop |
| Real Exam Qty: | 60-70 |
| Certificate Validity Period: | 3 years |
| Related Certifications: | HCIP-Datacom-Core Technology HCIE-Datacom V1.0 (Lab Exam) H12-892_V1.0 |
| Exam Price: | 300 USD |
| Exam Duration: | 90 minutes |
| Recommended Training: | Huawei Official Training - HCIE-Datacom V1.0 |
| Exam Registration: | Pearson VUE Huawei Talent Official |
| Sample Questions: | Huawei H12-891_V1.0 Sample Questions |
| Exam Way: | Online proctored or onsite at authorized test centers |
| Pre Condition: | Recommended to hold HCIP-Datacom-Core Technology certification; 5+ years of relevant network engineering experience suggested; must pass written exam before taking lab exam |
| Official Syllabus URL: | https://e.huawei.com/en/talent/certification/exam/H12-891_V1.0 |
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Huawei H12-891_V1.0（HCIE-Datacom V1.0）認定試験には筆記試験と実技試験があります。筆記試験では、ネットワーク設計原則、プロトコル、技術などのデータ通信技術の理論的知識について候補者をテストします。実技試験では、Huaweiのネットワーク機器と技術を使用して、データ通信ネットワークの設計、展開、およびトラブルシューティングの実践的なスキルについて候補者をテストします。合格した候補者には、データ通信技術の専門知識の証明としてグローバルに認められているHCIE-Datacom V1.0認定が授与され、その分野でのキャリアの見通しが向上します。
質問 # 140
All interfaces of the router have OSPF enabled, the Cost value of the link is identified in the figure, and the Loopback0 socket for R2 is advertised in area 1 , then Rl reaches 10022/32 with a Cost value of ?
正解：A
質問 # 141
If ISIS is used to transmit SIDs on an SR network, the node SIDs advertised by a Level-2 router are transmitted only within the same area.
正解：B
解説：
Comprehensive and Detailed In-Depth Explanation:
WhenIS-ISis used as theIGP (Interior Gateway Protocol)to advertiseSegment Routing (SR) SIDs, theLevel-2 (L2) routeradvertisesnode SIDs globally across the entire IS-IS domain, not just within a single area.
Level-1 (L1) routersonly advertise within the local area, butL2 routersdistribute information across multiple areas, enabling inter-area reachability.
Therefore, the statement isFALSE.
質問 # 142
In SSM, what version of IGMP is required?
正解：A
質問 # 143
Which of the following are application optimization functions in the Huawei SD-WAN Solution?
正解：A、B、C、D
解説：
Huawei'sSD-WAN solutionoffers a full suite of application optimization technologies, including:
Application identification: Uses DPI and traffic signatures to identify applications.
Intelligent traffic steering: Dynamically routes traffic based on application type and real-time link performance.
WAN optimization: Reduces latency, deduplicates traffic, and optimizes throughput for key apps.
QoS: Prioritizes critical applications and ensures bandwidth guarantees.
All listed options are part of the Huawei SD-WAN solutionfor optimizing user experience and application performance.
Correct answers: A, B, C, D
質問 # 144
An LSR (Label Switching Router) supports various label retention modes. Which of the following statements regarding the liberal mode are correct?
正解：C、D
解説：
Understanding MPLS Label Retention Modes
In MPLS (Multiprotocol Label Switching), a Label Switching Router (LSR) can operate in one of two label retention modes:
1## Liberal Label Retention Mode (LLRM)
* Stores all labels received from neighbors, even if they are not immediately used.
* Advantage: Fast convergence during link failures.
* Disadvantage: Consumes more memory & label space.
2## Conservative Label Retention Mode (CLRM)
* Only keeps labels for the best next-hop path.
* Advantage: Saves memory & label space.
* Disadvantage: Slower convergence when topology changes.
Why are C and D Correct?
# C. An LSR reserves all labels distributed by its neighbor.
* Correct: In Liberal Mode, the router accepts and stores all labels received, even for non-best paths.
# D. The liberal mode requires more memory and label space.
* Correct: Since the router keeps all labels, it requires higher memory & storage.
Why are A and B Incorrect?
# A. An LSR retains labels from a neighboring LSR only when the neighbor is its next hop.
* Incorrect: This describes Conservative Mode, not Liberal Mode.
# B. This label retention mode saves memory and label space.
* Incorrect: Liberal Mode consumes more memory, not less.
Real-World Application
* Liberal Mode is used in large-scale MPLS networks where fast failover is critical.
* Conservative Mode is preferred in memory-constrained environments.
# Reference: Huawei HCIE-Datacom Study Guide - MPLS Label Retention Modes
質問 # 145
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