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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Advanced Routing and Switching Technologies	37%	- Network Quality and Optimization 1. Traffic engineering and MPLS technology 2. QoS mechanism and deployment - Advanced Switching Technologies 1. VXLAN and EVPN principles and application 2. Multicast routing and deployment 3. Ethernet protection and reliability technologies - Advanced Routing Protocols 1. BGP route control, policy and deployment 2. IS-IS protocol principles and deployment 3. OSPF advanced features and optimization
Topic 2: Network Automation Technologies and Practice	17%	- Automation Foundation 1. YANG model and data modeling 2. Network programming basis and protocols - Huawei Automation Solutions 1. API-based network operation and maintenance 2. Configuration automation and deployment 3. eSight and iMaster NCE tools
Topic 3: Bearer WAN Planning and Deployment	15%	- Bearer Network Architecture 1. CloudWAN solution and application scenarios 2. Typical bearer network structure and requirements - High-level Technology Deployment 1. Network slicing and service bearing 2. SRv6 principles and deployment
Topic 4: Campus Network Planning and Deployment	23%	- Campus Network Architecture Design 1. CloudCampus solution architecture and features 2. Typical campus network structure and design principles - Campus Network Service Deployment 1. User access management and security 2. WLAN planning and deployment 3. Campus network management and operation
Topic 5: WAN Interconnection Network Planning and Deployment	8%	- WAN Interconnection Technologies 1. Traditional WAN connection technologies 2. SD-WAN architecture and Huawei solution - WAN Service Optimization 1. WAN security and isolation design 2. WAN link reliability and load balancing

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Huawei HCIE-Datacom V1.0 Sample Questions (Q55-Q60):

NEW QUESTION # 55
When there are multiple redundant links in an IS-IS network, multiple equivalent routes may occur. Regarding equivalent routing within an IS-IS network, which of the following descriptions is wrong?

A. If load sharing is configured, traffic is evenly distributed across each link
B. For each of the equivalent routes, you can assign a priority, with the highest priority routes preferred and the rest as backup routes
C. After you configure the equivalent routing priority, when the IS-S device forwards traffic to the destination segment, it will not use load sharing, but forward the traffic to the next hop with the highest priority
D. When the number of equivalent routes present in the networking is greater than the number configured by the command, and these routes have the same priority, the next hop device System IlD large routes are preferred for load sharing

Answer: A

NEW QUESTION # 56
The path of an SR-MPLS TE tunnel can be calculated by the controller or tunnel ingress.

A. FALSE
B. TRUE

Answer: B

Explanation:
Understanding SR-MPLS TE (Segment Routing MPLS Traffic Engineering)
# What is SR-MPLS TE?
* Segment Routing (SR) replaces traditional MPLS LDP/RSVP-TE signaling.
* Uses SR-TE policies to define network paths without requiring per-flow state on intermediate routers.
# How is the SR-MPLS TE Path Calculated?# By the SDN Controller (Centralized Path Computation)
* The controller (e.g., Huawei iMaster NCE) calculates the optimal SR path based on:
* Bandwidth requirements
* Latency constraints
* Traffic policies
* The controller then delivers the SR policy to the ingress router.
# By the Ingress Router (Distributed Path Computation)
* The ingress router computes the SR path dynamically based on local constraints.
* This method is useful when no centralized controller is available.
Why is the Answer TRUE?
# Both centralized (controller-based) and distributed (ingress router-based) path computation are supported in SR-MPLS TE.
Real-World Application:
* 5G and Cloud WANs: Centralized path optimization reduces congestion dynamically.
* Enterprise Networks: Local path computation ensures fast rerouting in case of failures.
# Reference: Huawei HCIE-Datacom Guide - SR-MPLS TE and Path Computation Methods

NEW QUESTION # 57
In 6PE networking, the shared explicit null label function can be enabled on routers to reduce the number of required MPLS labels. With this function, a router assigns a label with the value (enter only digits) to all 6PE routes.
0In 6PE (IPv6 over MPLS for Provider Edge), the shared explicit null label value is 0. When this function is enabled, the PE router assigns label 0 (IPv4 Explicit Null) to all IPv6 routes, reducing the label space consumption. This is known as label 0 reuse for IPv6 forwarding over MPLS.Exact Extract - HCIE-Datacom IPv6/MPLS Integration Section:"To optimize label usage in 6PE deployments, shared explicit null label (label 0) can be assigned to all 6PE routes."

Answer:

Explanation:
InPEIPvoverMPLSforProviderEdge
Explanation:
Huawei HCIE-Datacom Guide - IPv6 over MPLS (6PE and 6VPE)
Huawei Training Manual - MPLS IPv6 Label Assignment

NEW QUESTION # 58
The TTL field encapsulated in the MPLS label header can prevent infinite loops of MPLS packets. Which of the following statements regarding the TTL field are correct?

A. If TTL copy is disabled, users can use the tracert function to view the LSR of the MPLS domain.
B. MPLS encapsulation in frame mode supports the TTL field. MPLS encapsulation in cell mode does not support the TTL field.
C. MPLS provides two processing modes on the TTL field:TTL in the MPLS header copies the IP TTL value when an IP packet enters the MPLS network.The ingress LER sets the TTL value in the MPLS header to 255.
D. The processing of IP TTL copy hides the LSR in an MPLS domain, improving network security.

Answer: B,C,D

Explanation:
TheTime-To-Live (TTL) fieldin MPLS is essential forpreventing infinite loopsandenhancing security.
MPLS TTL Field Functionality:
It prevents packets fromcirculating indefinitelyin the MPLS network.
It allowstraceroute (tracert) to identify MPLS hopswhen TTL propagation is enabled.
Explanation of Correct Answers:#B. The processing of IP TTL copy hides the LSR in an MPLS domain, improving security.
IfTTL propagation is disabled, MPLS routers do not decrease TTL, hidinginternal LSRsfrom traceroute, enhancing security.
#C. MPLS provides two TTL processing modes:
Default Mode:The MPLS TTLcopies the IP TTL valuewhen an IP packet enters the MPLS network.
Uniform Mode:The ingress LERsets the MPLS TTL to 255, so it does not decrement.
#D. MPLS encapsulation in frame mode supports the TTL field, while cell mode does not.
Frame Mode (Ethernet, PPP, etc.) supports TTL.
Cell Mode (ATM/MPLS) does not support TTL.
Incorrect Answer Explanation:#A. If TTL copy is disabled, users can use the tracert function to view MPLS hops.
Wrong!If TTL propagation is disabled, tracertcannotsee LSRs inside the MPLS core network.
Reference from Huawei HCIE-Datacom Documentation:
Huawei MPLS Technology Guide - TTL Field & Loop Prevention
HCIE-Datacom MPLS VPN Configuration Guide - Traceroute in MPLS Networks

NEW QUESTION # 59
An existing router running OSPF is connected to zone 0 and zone l. You configured zone l as the Stub domain.
What classes does an LSA that operates only inside zone l contain?

A. 1LSA,2 3LSA
B. 1 ?LSA ? 2 ?LSA
C. 3LSA 4LSA1 2
D. 7 ?LSA
E. 1 ??LSA,2 ??LSA 5 ??LSA

Answer: A

NEW QUESTION # 60
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