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Huawei H12-891_V1.0 Exam Syllabus Topics:

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

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Huawei HCIE-Datacom V1.0 Sample Questions (Q199-Q204):

NEW QUESTION # 199
iMaster NCE-WAN is the core component of the Huawei SD-WAN Solution and is responsible for SD- WAN network management and service orchestration.

A. FALSE
B. TRUE

Answer: B

Explanation:
Comprehensive and Detailed Explanation:
# iMaster NCE-WAN is the centralized SD-WAN controller that:
* Manages SD-WAN network devices (CPEs, routers).
* Optimizes traffic steering using AI-driven policies.
* Enables automation, security, and analytics.
Thus, the statement is TRUE.
# Reference: Huawei HCIE Datacom - SD-WAN Architecture

NEW QUESTION # 200
As shown in the figure,ARP broadcast suppression is enabled on VTEP1inBD 20 (VNI 200).
VTEP1 learns ARP informationaboutPC2 through BGP EVPN routes.
WhenVTEP1 forwards the ARP request for PC1's MAC address to VTEP2,
What is the destination MAC address of the inner data frame?

A. MAC C
B. MAC D
C. MAC A
D. MAC B

Answer: A

Explanation:
Understanding VXLAN and ARP Suppression in BGP EVPN
VXLAN (Virtual Extensible LAN) is used toextend Layer 2 networks over Layer 3 infrastructure.
VXLAN uses VTEPs (VXLAN Tunnel Endpoints) to encapsulate and forward Layer 2 traffic.
BGP EVPN (Ethernet VPN)is used forMAC/IP address learning and distributionacross VXLAN networks.
How ARP Request Forwarding Works in This Scenario?
1##ARP Broadcast Suppression Enabled (VXLAN Optimized Forwarding)
SinceARP broadcast suppressionis enabled onVTEP1, theARP request is not flooded.
Instead, VTEP1checks its EVPN learned databaseto findPC2's MAC address (MAC C).
2##VTEP1 Encapsulates the ARP Request
VTEP1encapsulates the ARP request in a VXLAN packetand sends it toVTEP2.
Theoriginal ARP frame inside the VXLAN tunnel still has:
Source MAC:MAC A(PC1 ' s MAC)
Destination MAC:MAC C(PC2 ' s MAC, learned via EVPN)
3##VXLAN Outer Headers
Theouter VXLAN headeruses:
Source IP:1.1.1.1 (VTEP1)
Destination IP:2.2.2.2 (VTEP2)
VNI (VXLAN Network Identifier):200(BD 20)
4##VTEP2 Receives and Forwards the ARP Request
VTEP2 decapsulates the VXLAN packetand forwards theoriginal ARP requesttoPC2 (MAC C).
This ensures thatonly the intended receiver (PC2) gets the ARP request, preventing unnecessary broadcast flooding.
Why the Answer is MAC C?
#B. MAC C is Correct
Thedestination MAC of the inner data frameisPC2's MAC (MAC C).
This is becauseVTEP1 forwards the ARP request directly to VTEP2, which then forwards it to PC2.
Why Other Answers Are Incorrect?
#A. MAC B (Incorrect)
MAC B is VTEP1's MAC address, which is used in theouter VXLAN header, not in the inner Ethernet frame.
#C. MAC A (Incorrect)
MAC A is the source MACof the ARP request (PC1), not the destination.
#D. MAC D (Incorrect)
MAC D is not mentioned in the topology, so it is irrelevant.
# Reference:Huawei HCIE Datacom - VXLAN BGP EVPN and ARP Suppression

NEW QUESTION # 201
In the admission design for large- and medium-sized campus networks, which of the following authentication modes can be used for PCs connected to IP phones?

A. 802.1X authentication
B. Multi-mode authentication
C. Portal authentication
D. MAC address authentication

Answer: B

Explanation:
Comprehensive and Detailed In-Depth Explanation:
In large- and medium-sized campus networks,Multi-mode authenticationis commonly used for PCs connected to IP phones. This is because multi-mode authentication allows:
Multiple authentication methods on the same interface,such as MAC address authentication for the IP phone and802.1X authentication for the PC.
This setup is ideal for scenarios where both devices share a single network port but require different authentication mechanisms.
MAC address authentication (A)and802.1X authentication (B)individually cannot accommodate both devices efficiently.
Portal authentication (D)is mainly used for guest access and is not practical for IP phone and PC connections.

NEW QUESTION # 202
In Huawei SD-WAN Solution, which of the following tunneling technologies is used to establish data channels?

A. MPLS
B. GRE over IPsec
C. WLAN
D. IPsec

Answer: B,D

Explanation:
Understanding Huawei SD-WAN Tunneling Technologies
Huawei SD-WAN usessecure tunnelingto connect branches, data centers, and cloud services.
#Tunneling Technologies in SD-WAN:
#IPsec (Answer B)# Providessecure encrypted tunnelsover public or private networks.
#GRE over IPsec (Answer D)#Encapsulates traffic inside GRE, then encrypts with IPsec, enabling support for multicast and non-IP traffic.
#A. WLAN (Incorrect Choice)# WLAN is awireless technology, not a tunneling protocol.
#C. MPLS (Incorrect Choice)# MPLS is acore network transporttechnology but is not used to establish SD- WAN data channels directly.
Why are Answers B and D Correct?
#Huawei SD-WAN primarily uses IPsec for data encryption.
#GRE over IPsec is used when supporting multicast or dynamic routing protocols over tunnels.
#Reference:Huawei HCIE-Datacom Guide - SD-WAN Tunneling Mechanisms

NEW QUESTION # 203
In the Huawei SD-WAN Solution, the topologies of different VNs must be the same.

A. FALSE
B. TRUE

Answer: A

Explanation:
Understanding Huawei SD-WAN VN (Virtual Network) Topologies
Huawei SD-WAN uses Virtual Networks (VNs) to provide traffic isolation and policy-based routing for different services, branches, and applications.
🔹 VN Topologies Can Be Different
Each VN (Virtual Network) can have its own topology.
Some VNs may use full-mesh, while others may use hub-and-spoke or star topology.
Different VNs can have different routing and security policies.
✅ Example:
Corporate traffic (VN1) → Full-mesh topology for efficient inter-branch communication.
Guest Wi-Fi traffic (VN2) → Hub-and-spoke topology to restrict inter-site communication.
Why is the Answer FALSE?
❌ All VNs do not have to use the same topology.
✅ Each VN can be configured independently with a unique topology, routing policy, and security settings.
✅ Reference: Huawei HCIE-Datacom Guide - SD-WAN VN Topologies and Segmentation

NEW QUESTION # 204
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