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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Objectives
Topic 1: Network Automation and Programmability	- SDN and automation 1. Network automation tools 2. NETCONF/YANG basics
Topic 2: Enterprise Network Architecture	- Network design principles 1. Hierarchical network architecture 2. Scalability and high availability design
Topic 3: Routing and Switching Technologies	- IP routing protocols 1. OSPF 2. IS-IS basics 3. BGP - Switching technologies 1. Ethernet switching mechanisms 2. VLAN and STP
Topic 4: WAN and VPN Technologies	- MPLS fundamentals 1. MPLS LDP and forwarding 2. VPN technologies
Topic 5: IPv6 and Advanced IP Technologies	- IPv6 deployment 1. IPv6 addressing and transition
Topic 6: Data Center and Virtualization Technologies	- VXLAN and overlay networks 1. Data center network virtualization
Topic 7: Network Security and QoS	- QoS mechanisms 1. Traffic classification and shaping - Security mechanisms 1. Basic network security design 2. ACL and traffic control

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Huawei HCIE-Datacom V1.0 Sample Questions (Q119-Q124):

NEW QUESTION # 119
The IS-IS Level-1 neighbor relationship is not established between R3 and R4. Referring to the following information, what is the possible cause?

A. The IIH authentication between R3 and R1 fails.
B. The area IDs of R3 and R4 are different.
C. The IS-IS levels of R3 and R4 do not match.
D. The circuit types of the interfaces connecting R3 and R4 do not match.

Answer: B

Explanation:
From the IS-IS error output, the key error is:
Mismatched Area Addr(L1): 13
This clearly indicates that the area addresses are different, which prevents the Level-1 adjacency from forming.
Why is Option D Correct?
* IS-IS Level-1 routers must have the same area ID to form an adjacency.
* Since the log shows a mismatched area address, the adjacency fails at Level-1.
* If R3 and R4 were Level-2 routers, they could form an adjacency even with different area IDs.
Why Are the Other Options Incorrect?
# Option A: No authentication failure is reported.# Option B: No "Mismatched Level" errors appear, so their levels are compatible.# Option C: No "Bad Circuit Type" errors indicate mismatched circuit types.
Thus, the correct answer is D.
# Reference: Huawei HCIE Datacom - IS-IS Neighbor Troubleshooting

NEW QUESTION # 120
In a shared network, what mechanism does PIM-SM use to prevent duplicate traffic?( Single choice questions).

A. Assert mechanism
B. Join/Prune mechanism
C. BSR/RP mechanism
D. Register mechanism

Answer: A

NEW QUESTION # 121
Which of the following statements aboutSR-MPLS Policy path planningare correct?

A. When planning paths based on delay, you must deploy TWAMP or iFIT in advance to measure real- time network delay.
B. When statically planning SR-MPLS Policy paths, you can plan load balancing for the primary path.
C. When planning paths based on bandwidth, you need to set the available bandwidth of each interface in advance.
D. If you use the controller to plan SR-MPLS Policy paths, only primary and backup paths can be deployed, and load balancing cannot be implemented for the primary path.

Answer: A,B,C

Explanation:
Comprehensive and Detailed In-Depth Explanation:
A). When planning paths based on bandwidth:Correct. The available bandwidth of each interface must beset in advanceto allow path planning based on bandwidth requirements.
B). When planning paths based on delay:Correct. To plan paths considering delay, you need to deployTWAMP (Two-Way Active Measurement Protocol)oriFIT (Intelligent Flow Information Telemetry)to measure thereal-time delayon network links.
C). If the controller plans SR-MPLS Policy paths:Incorrect. The controller can planprimary, backup, and load- balanced paths, enablingtraffic distribution across multiple paths.
D). Statically planned SR-MPLS Policy paths:Correct. You canmanually configure load balancingfor the primary path when planning the SR-MPLS Policy path statically.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei SR-MPLS Traffic Engineering Configuration Guide

NEW QUESTION # 122
What are the main reasons why RSTP converges faster than STP?

A. RSTP increases the variety of port states
B. RSTP has a smaller timer
C. RSTP does not converge based on timer
D. RSTP has a smaller overhead

Answer: C

NEW QUESTION # 123
BGP routing policies can control the publication and acceptance of routes

A. TRUE
B. FLASE

Answer: A

NEW QUESTION # 124
......

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