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Huawei H12-891_V1.0 Exam Syllabus Topics:

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

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Huawei HCIE-Datacom V1.0 H12-891_V1.0 Prüfungsfragen mit Lösungen (Q194-Q199):

194. Frage
Which nationality meets the following two conditions: 1] BGP Router A can choose whether the Ulpdate message is based on the nationality. ( ) If Router B receives a Updae message containing a cross-hatch, run-by B does not have an identified solidity, but will also contain a multifaceted] Ulpdate retracts the advertisement to Router C.
Router C may recognize and apply this attribute. (Multiple choice questions).

A. Aggregator
B. Multi_Exit_Disc
C. Local_Pref
D. Community

Antwort: A,D

195. Frage
Prefix segments and adjacency segments are globally visible and unique.

A. TRUE
B. FALSE

Antwort: B

Begründung:
Understanding SR-MPLS Prefix and Adjacency Segments
#What Are Prefix Segments?
Globally uniquelabels assigned to network prefixes.
Advertised viaIGP (OSPF, IS-IS) with SRGB (Segment Routing Global Block).
#What Are Adjacency Segments?
Locally significant labelsassigned to direct router adjacencies.
Not globally visible-only used within a local router'sLFIB (Label Forwarding Information Base).
Why is the Answer FALSE?
#Prefix Segments are globally unique, but Adjacency Segments are only locally significant.
#Adjacency Segments are not distributed globally through IGP.
#Only Prefix Segments use globally advertised SRGB labels.
Real-World Application:
Segment Routing Traffic Engineering (SR-TE):Usesprefix segments for global routingandadjacency segments for local path steering.
5G Core Networks:UsesSR-MPLS with Prefix SIDs for scalable path selection.
#Reference:Huawei HCIE-Datacom Guide - SR-MPLS Prefix & Adjacency Segments

196. Frage
If an engineer wants to remotely log in to a Huawei device, the engineer uses the Paramiko library to compile the following code when compiling the SSH Python script:
cli = ssh.invoke_shell()
cli.send("screen-length 0 temporary\n")
What is the function of screen-length 0 temporary?

A. Performing automatic word wrap
B. Canceling split-screen display
C. Canceling automatic word wrap
D. Performing split-screen display

Antwort: B

Begründung:
Understanding screen-length Command in Huawei Devices
# What Does screen-length Do?
* Controls how much output is displayed at a time on the Huawei CLI.
* By default, command output is paginated (split-screen display).
* screen-length 0 temporary disables the split-screen display, allowing continuous output without pauses.
Analysis of Each Option:
# A. Performing automatic word wrap # Incorrect
* This command does not wrap long text lines, it controls screen pagination.
# B. Performing split-screen display # Incorrect
* This command disables split-screen display, not enables it.
# C. Canceling split-screen display # Correct
* This allows continuous command output without "Press Enter to continue" interruptions.
# D. Canceling automatic word wrap # Incorrect
* Word wrap behavior is not controlled by screen-length.
Real-World Application:
* Automated Network Monitoring: Used in Python scripts for uninterrupted CLI output collection.
* Log Analysis: Helps in extracting large command outputs for troubleshooting.
# Reference: Huawei HCIE-Datacom Guide - CLI Configuration and Automation with Paramiko

197. Frage
Fill in Blank
A VGMP packet is encapsulated with a UDP header and a VGMP header. By default, a VGMP packet uses UDP port _____.

Antwort:

Begründung:
Understanding VGMP (Virtual Gateway Management Protocol)
Explanation:
Understanding VGMP (Virtual Gateway Management Protocol)
🔹 What is VGMP?
VGMP (Virtual Gateway Management Protocol) is used in Huawei firewalls to manage hot standby (HRP - Hot Standby Routing Protocol).
Ensures that the active and standby firewalls synchronize their states for high availability.
🔹 How Does VGMP Work?
The Active and Standby firewalls exchange VGMP packets to maintain state synchronization.
These packets are encapsulated within UDP for transport.
The default UDP port for VGMP is 512.
Why is the Answer 512?
✅ Huawei firewalls use UDP port 512 by default for VGMP communication.
✅ This ensures that VGMP heartbeats and synchronization messages are correctly processed.
Real-World Application:
Enterprise Firewalls: VGMP ensures failover between active and standby firewalls.
Carrier-Grade Firewalls: Uses VGMP with HRP to achieve zero-downtime firewall redundancy.
✅ Reference: Huawei HCIE-Datacom Guide - VGMP and HRP High Availability Mechanisms

198. Frage
IsIS IPv6 cost 50 is configured under the interface, and the meaning of the command is ?

A. The LEVEL-1 and Leve1-2 costs of the INTERFACE's IS-IS IPv6 are both 60
B. The LEVEL-1 cost of the interface's IS-IS IPv6 is 50
C. The LEVEL-2 cost of the interface's IS-IS IPv6 is 50
D. The LEVEL-1 and Level-2 costs of the interface's IS-IS IPv6 are 50

Antwort: D

199. Frage
......

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