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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Campus Network Planning and Deployment	23%	- Network Services 1. QoS 2. Network Security 3. WLAN - Underlay Network 1. Physical Layer Design 2. IP Address Planning - Campus Network Architecture 1. Spine-Leaf Architecture 2. Hierarchical Design - Overlay Network (VXLAN) 1. VXLAN Gateway 2. BGP EVPN
Bearer WAN Planning and Deployment	15%	- VPN Services 1. L3VPN 2. EVPN - Traffic Engineering 1. SR-TE 2. RSVP-TE 3. Flex-Algo - SR (Segment Routing) 1. SR-MPLS 2. SRv6
Network Automation	17%	- Automation Technologies 1. Ansible 2. NETCONF/YANG 3. RESTful API 4. Python Scripting - NCE (Network Cloud Engine) 1. Architecture 2. Deployment - iMaster NCE 1. Intent-Driven Networking
WAN Interconnection Network Planning and Deployment	8%	- MPLS VPN 1. Hub-Spoke 2. Full-Mesh - Inter-AS VPN 1. Option C 2. Option B 3. Option A - SD-WAN 1. Orchestrator 2. Architecture
Advanced Routing and Switching Technology	37%	- MPLS 1. MPLS VPN 2. MPLS TE 3. Basic Concepts 4. LDP 5. Configurations - BGP 1. Route Aggregation 2. Path Selection 3. Routing Policies 4. Basic Concepts 5. Configurations and Troubleshooting - IS-IS 1. Addressing 2. Network Types 3. Route Leaking 4. Basic Concepts 5. Configurations and Troubleshooting - OSPF 1. LSA Types 2. Basic Concepts 3. Area Types 4. Configurations and Troubleshooting 5. Route Calculation - Route Control 1. ACL 2. IP Prefix List 3. Route-policy 4. Route Filtering - Ethernet Switching 1. STP/RSTP/MSTP 2. VXLAN 3. Stack & CSS 4. VLAN

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Huawei HCIE-Datacom V1.0 Sample Questions (Q149-Q154):

NEW QUESTION # 149
Which of the following statements about OPS (Open Programmability System) application scenarios is incorrect?

A. When the OPS is used to automatically deploy unconfigured devices, a Python script is used to obtain the IP addresses of the software and configuration file server and download the system software and configuration file.
B. The OPS can reduce the impact of the network environment in some cases. For example, when collected information is transmitted to a server, the Python script can be used to temporarily store the execution result to the device when the network is disconnected. After the network is reconnected, the execution result is transmitted to the server.
C. To enable a network device to automatically send a configuration file to the server after the device configuration is saved, users can use the maintenance assistant to create a timer trigger condition and periodically run the Python script.
D. The OPS can be used to automatically check the health status of devices.

Answer: B

Explanation:
Comprehensive and Detailed In-Depth
A . Correct: OPS can use the maintenance assistant to trigger Python scripts periodically or based on events.
B . Correct: OPS supports automatic deployment using Python scripts to download software and configuration files.
C . Incorrect: OPS does not inherently provide local storage for temporarily saving execution results when the network is disconnected. This would require additional programming logic in the script itself, which is not a built-in feature of OPS.
D . Correct: OPS can run scripts to automatically check device health and report the status.
Therefore, the incorrect statement is C.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei Open Programmability System (OPS) Configuration Guide

NEW QUESTION # 150
Regarding the BGP alliance, the following description is wrong? Radio

A. Subsystems within a consortium can use private AS numbers. Huawei NE/AR routers, a consortium can be configured with up to 32 subsystems.
B. The consortium divides an AS into sub-AS, and the alliance external AS still considers the consortium to be an AS
C. The subas number of the federation, which by default is advertised to the BGP peer outside the federation
D. Consortium can easily detect the routing loop within the AS because EBGP is running between the subAS

Answer: C

NEW QUESTION # 151
When an SSH client logs in to an SSH server that is configured only with username and password authentication in SSH mode, the key exchange phase is not involved (no key is generated).

A. FALSE
B. TRUE

Answer: A

Explanation:
Understanding SSH Authentication and Key Exchange
#What Happens When an SSH Client Connects to a Server?
1##Key Exchange Phase (KEX)
Even if onlypassword authenticationis used, SSHstill performs key exchange.
The server and clientnegotiate encryption keysusing algorithms likeDiffie-Hellman (DH).
2##User Authentication Phase
After encryption keys are exchanged, the userauthenticates using a username and password.
Why is the Answer FALSE?
#Even with password authentication, SSH still performs key exchange to establish an encrypted session.
#The SSH session is always encrypted using cryptographic keys generated during KEX.
Real-World Application:
Secure Remote Access:Protects login credentials fromMITM (Man-in-the-Middle) attacks.
Cloud & Datacenter Networks:Ensuressecure SSH connections across remote infrastructure.
#Reference:Huawei HCIE-Datacom Guide - SSH Key Exchange and Authentication

NEW QUESTION # 152
The following statement about the OSPFv3 message format is correct?( Multiple select).

A. The OSPF version number changed from 2 to 3
B. Hello messages no longer contain address information, carrying Interface lD
C. There is no change in the option field of the Hello message
D. Remove the Authentication, Auth Type fields

Answer: A,B,D

NEW QUESTION # 153
In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, which of the following statements about symmetric IRB forwarding are correct?

A. The ingress VTEP forwards packets based only on the Layer 2 forwarding table.
B. Both the ingress VTEP and egress VTEP forward packets based on the Layer 3 forwarding table.
C. The egress VTEP forwards packets based only on the Layer 2 forwarding table.
D. When VTEPs forward inter-subnet user communication packets, the VNI carried in the VXLAN header is the L3VNI.

Answer: B,D

Explanation:
VXLAN Inter-Subnet Routing with Symmetric IRB
VXLAN supports inter-subnet routing using Integrated Routing and Bridging (IRB). In symmetric IRB, both ingress and egress VTEPs perform Layer 3 forwarding to ensure efficient packet forwarding across subnets.
✅ A. Both the ingress VTEP and egress VTEP forward packets based on the Layer 3 forwarding table.
In symmetric IRB, both ingress and egress VTEPs perform Layer 3 lookup and forwarding.
The ingress routes packets before encapsulating them in VXLAN, and the egress performs another Layer 3 lookup to determine final delivery.
✅ D. When VTEPs forward inter-subnet user communication packets, the VNI carried in the VXLAN header is the L3VNI.
L3VNI (Layer 3 VXLAN Network Identifier) is used for inter-subnet routing between VXLAN segments.

NEW QUESTION # 154
......

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