H12-891_V1.0-ENU Exam Preparation Material | HCIE-Datacom V1.0

Prepare for the H12-891_V1.0-ENU with reliable study materials, practice questions, and key exam insights.

Prepare for the H12-891_V1.0-ENU HCIE-Datacom V1.0 exam with CertQueen's independently developed study resources. Review important concepts, practice scenario-based questions, and use clear explanations to identify areas that require further study.

Question#1

Which of the following is not the function of OSPFv3 Link-LSAs?

A. Advertises the interface ID of the local router to other routers attached to the link.

B. Advertises the link-local address of the local interface to other routers attached to the link.

C. Advertises a list of IPv6 prefixes of the local interface to other routers attached to the link.

D. Advertises the Options field in the Network-LSA originated on the local link to other routers attached to the link.

Explanation:
Link-LSA (Type 8) in OSPFv3 performs the following:
Advertises the router’s link-local address to neighbors.
Advertises the router’s interface ID on the link.
Carries IPv6 prefixes associated with the interface (since Router LSA no longer does this in OSPFv3).
The Options field in Link-LSA contains capabilities of the originating router, not the options from Network-LSA.
So, Option D is incorrect ― the Link-LSA does not advertise options from the Network-LSA. Correct Answer D
Reference: Huawei HCIE-Datacom V1.0 Study Guide ―Chapter: OSPFv3 LSA Types Section: Link-LSA Purpose and Fields

Question#2

SR-MPLS uses the MPLS forwarding plane, and therefore requires MPLS to be enabled.
Which of the following conditions must be met for MPLS to be automatically enabled on an interface? (Select all that apply)

A. The SRGB is configured for the IGP process.

B. Segment routing is enabled for IGP, and IGP is enabled on the interface.

C. The static adjacency label of the corresponding interface is configured in the segment routing view.

D. Segment routing is enabled in the system view.

Explanation:
To automatically enable MPLS on an interface in SR-MPLS:
Segment routing must be enabled globally in the system view → ✅
Segment routing must also be enabled under the IGP process, and IGP (OSPF or IS-IS) must be enabled on the interface → ✅
Clarifications:
SRGB (Segment Routing Global Block) configuration defines SID ranges but does not trigger MPLS enablement → ❌
Static adjacency labels are advanced options and do not auto-enable MPLS → ❌ Correct answers: B, D
Reference: Huawei HCIE-Datacom V1.0 Study Guide ―Chapter: Segment Routing MPLSSection: SR-MPLS Configuration Requirements

Question#3

MPLS supports Forwarding Equivalence Class (FEC).
Which of the following cannot be used as a FEC allocation standard?

A. Application protocol

B. Fragment offset

C. Class of Service (CoS)

D. Destination address

Explanation:
FEC (Forwarding Equivalence Class) in MPLS is a group of packets that are forwarded in the same manner .
MPLS can classify packets into FECs based on factors such as:
Destination IP address
Source address
CoS (Class of Service)
Application type
However, Fragment Offset, which is part of the IP header used for IP fragmentation, is not used in FEC classification. Fragment offset is more relevant to how IP packets are reconstructed and not suitable or used as a classification standard for forwarding decisions in MPLS.
Exact Extract - Huawei HCIE-Datacom V1.0 MPLS Chapter:
“FEC classification may be based on various parameters including destination address, source address, and even CoS values. However, fragment offset is not used as an FEC criterion, as MPLS forwarding occurs before IP reassembly.”
Reference: Huawei HCIE-Datacom Study Guide C MPLS Fundamentals
Huawei Datacom Training Courseware C Chapter on MPLS FEC and Label Distribution

Question#4

Congestion management technology can be used to discard data packets in the buffer queue to prevent the buffer queue from being exhausted.

A. TRUE

B. FALSE

Explanation:
This statement confuses congestion management with congestion avoidance:
Congestion Management: Refers to techniques like PQ, CQ, WRR, etc., to schedule packets in queues ― i.e., manage how packets are sent, not discarded.
Congestion Avoidance: Techniques like WRED are used to preemptively discard packets to avoid full queues ― these do discard packets.
Hence, congestion management does NOT discard packets ― it's about controlling transmission order and prioritization.
Correct Answer B. FALSE
Reference: Huawei HCIE-Datacom V1.0 Study Guide ―Chapter: QoS FundamentalsSection:
Congestion Management vs Congestion Avoidance

Question#5

In the following figure, a GRE tunnel is established between R1 and R2 .
If the command ping -a 10.1.1.1 10.3.1.1 is run on R1, which of the following statements is correct about the ICMP packet sent by GE0/0/1 of R1?

A. The packet will be encapsulated using GRE, and the source and destination IP addresses in the outer IP header are 10.0.12.1 and 10.0.12.2, respectively.

B. The packet will be encapsulated using GRE, and the source and destination IP addresses in the outer IP header are 10.0.12.1 and 10.3.1.1, respectively.

C. The packet will be encapsulated using GRE, and the source and destination IP addresses in the inner IP header are 10.1.1.1 and 10.3.1.1, respectively.

D. The packet will be encapsulated using GRE, and the source and destination IP addresses in the inner IP header are 10.1.1.1 and 10.0.12.2, respectively.

Explanation:
Comprehensive and Detailed In-Depth

Exam Code: H12-891_V1.0-ENU
Q & A: 322 Q&As Updated: Oct 26,2026

Access Complete H12-891_V1.0-ENU Preparation Material

What This H12-891_V1.0-ENU Study Resource Helps You Do

Review Key Concepts

Review the technologies, products, processes, and practical skills covered by the current H12-891_V1.0-ENU exam objectives.

Practice Scenario-Based Questions

Work through independently developed questions designed to strengthen your understanding of technical scenarios and decision-making.

Identify Knowledge Gaps

Use your results and the provided explanations to find weaker areas and focus your study more effectively.

How to Use This H12-891_V1.0-ENU Preparation Material

Review the Exam Scope

Start by reviewing the topics covered by the H12-891_V1.0-ENU exam. Compare them with the official exam objectives to understand the required technologies, operational tasks, and practical skills, then identify the areas that deserve the most attention.

Practice Independently

Complete a focused set of practice questions for each topic. On your first attempt, avoid referring to notes, answers, or other study resources so that you can evaluate your current understanding more accurately.

Study the Explanations

Review the answers and explanations after completing each practice session. Understand why the correct option is appropriate for the given scenario and why the other options may be incorrect or less suitable.

Close Knowledge Gaps

Keep track of incorrect answers, unfamiliar concepts, and weaker knowledge areas. Review these topics using official documentation and practical experience, then answer the related questions again to reinforce your understanding and monitor your progress.

Independent H12-891_V1.0-ENU Preparation Resource

CertQueen independently develops its certification study materials for educational purposes. The practice questions are not copied from, recalled from, or presented as live or official exam questions.

CertQueen is not affiliated with, endorsed by, sponsored by, or authorized by any certification provider. Certification names, exam codes, product names, and related trademarks are the property of their respective owners and are referenced only for identification and educational purposes.

Exam Code: H12-891_V1.0-ENU
Q & A: 322 Q&As
Updated: Oct 26,2026

Access Complete H12-891_V1.0-ENU Preparation Material