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Huawei H12-891_V1.0 Exam Syllabus Topics:

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

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Huawei HCIE-Datacom V1.0 Sample Questions (Q144-Q149):

NEW QUESTION # 144
In Huawei SD-WAN Solution, which of the following tunneling technologies is used to establish data channels?

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

Answer: A,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 # 145
How many bits are there in the label field of MPLS ?

A. 0
B. 1
C. 2
D. 3

Answer: A

NEW QUESTION # 146
BGP routing policies can control the publication and acceptance of routes

A. TRUE
B. FLASE

Answer: A

NEW QUESTION # 147
In Huawei SD-WAN Solution, which of the following tunneling technologies is used to establish data channels?

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

Answer: A

Explanation:
Huawei SD-WAN establishes secure tunnels between SD-WAN edge devices (CPEs, AR routers, and controllers) using tunneling protocols.
# B. GRE over IPsec (Correct Answer)
* GRE (Generic Routing Encapsulation) over IPsec is the primary tunneling method used in Huawei SD-WAN.
* GRE provides multi-protocol encapsulation, while IPsec ensures encryption and security.
* Used for secure communication over public WAN links (e.g., the internet, LTE, MPLS, etc.).

NEW QUESTION # 148
Which of the following statements is incorrect about the user authentication points on the network?

A. Deploying user authentication points at the access layer achieves granular permission management and high network security.
B. When user authentication points are moved from the access layer to the aggregation layer, MAC address authentication for users may fail.
C. Moving user authentication points from the access layer to the aggregation or core layer greatly reduces the number of user authentication points, thereby effectively mitigating the pressure on the AAA server.
D. Deploying user authentication points at the access layer has both advantages and disadvantages when compared to doing so at the aggregation or core layer. Policy association can be applied if user authentication points are deployed at the access layer.

Answer: B

Explanation:
Understanding User Authentication Points in a Network
Authentication points can be deployed at different network layers based on security and scalability needs:
✅ Access Layer Authentication:
Ensures high security & granular control (user-level authentication).
Preferred in high-security enterprise networks.
✅ Aggregation or Core Layer Authentication:
Reduces authentication overhead but provides less granular control.
Suitable for large-scale networks where authentication load needs to be balanced.
Analysis of the Answer Choices:
✅ A. Deploying user authentication points at the access layer achieves granular permission management and high network security.
Correct: Provides fine-grained control per user and prevents unauthorized access.
✅ B. Moving user authentication points from the access layer to the aggregation or core layer greatly reduces the number of user authentication points, thereby effectively mitigating the pressure on the AAA server.
Correct: Fewer authentication points mean less load on the AAA server.
✅ C. Deploying user authentication points at the access layer has both advantages and disadvantages when compared to doing so at the aggregation or core layer. Policy association can be applied if user authentication points are deployed at the access layer.
Correct: Policy-based authentication is best applied at the access layer for granular control.
❌ D. When user authentication points are moved from the access layer to the aggregation layer, MAC address authentication for users may fail.
Incorrect: MAC authentication works at both layers, but policy adjustments may be needed.
✅ Reference: Huawei HCIE-Datacom Guide - User Authentication Strategies in Enterprise Networks

NEW QUESTION # 149
......

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