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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. QoS mechanism and deployment 2. Traffic engineering and MPLS technology - Advanced Switching Technologies 1. Ethernet protection and reliability technologies 2. VXLAN and EVPN principles and application 3. Multicast routing and deployment - Advanced Routing Protocols 1. BGP route control, policy and deployment 2. IS-IS protocol principles and deployment 3. OSPF advanced features and optimization
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. Campus network management and operation 3. WLAN planning and deployment
Bearer WAN Planning and Deployment	15%	- High-level Technology Deployment 1. Network slicing and service bearing 2. SRv6 principles and deployment - Bearer Network Architecture 1. CloudWAN solution and application scenarios 2. Typical bearer network structure and requirements
Network Automation Technologies and Practice	17%	- Automation Foundation 1. YANG model and data modeling 2. Network programming basis and protocols - Huawei Automation Solutions 1. Configuration automation and deployment 2. eSight and iMaster NCE tools 3. API-based network operation and maintenance
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. Traditional WAN connection technologies 2. SD-WAN architecture and Huawei solution

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H12-891_V1.0 Exam Tests, H12-891_V1.0 Latest Test Sample

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Huawei HCIE-Datacom V1.0 Sample Questions (Q131-Q136):

NEW QUESTION # 131
Which of the following number sequences can be matched by the regular expression100.$?

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

Answer: A,B

Explanation:
Comprehensive and Detailed In-Depth Explanation:
The regular expression100.$can be broken down as follows:
100:Matches the exact sequence of digits "100".
(dot): Representsany single character.
$:Indicates theend of the line.
Therefore, the pattern100.$matches anyfour-character sequencethat starts with "100" and ends withany single character.
1000 (A): Matches because it has four digits, starting with "100" and ending with "0".
1001 (B): Matches because it has four digits, starting with "100" and ending with "1".
10000 (C): Doesnot matchbecause it hasfive digits.
100 (D): Doesnot matchbecause it only hasthree digits.

NEW QUESTION # 132
OSPF is a mature protocol and is unlikely to have route computation errors in a regular networking environment under correct configurations. Which of the following statements are correct about the possible causes preventing an OSPF neighbor relationship from entering Full state?

A. The router IDs of neighbors are the same.
B. The OSPF MTU values of interfaces on both ends of the link are different.
C. A link works abnormally.
D. The OSPF network types on both ends of the link are inconsistent.

Answer: A,B,C,D

Explanation:
For OSPF neighbors to reach Full state, they must exchange LSAs (Link State Advertisements) properly and synchronize their databases.
Possible Causes Preventing OSPF from Entering Full State:
✅ A. A link works abnormally
If the physical or Layer 2 link is unstable, OSPF Hello packets may be lost, preventing the Full state.
✅ B. The OSPF network types on both ends of the link are inconsistent
OSPF network types (Broadcast, P2P, NBMA, etc.) must match on both ends.
Example: If one router is P2P and the other is Broadcast, adjacency issues occur.
✅ C. The router IDs of neighbors are the same
Router ID conflicts prevent OSPF adjacencies from forming.
Each router must have a unique Router ID.
✅ D. The OSPF MTU values of interfaces on both ends of the link are different If MTU settings do not match, OSPF Database Description (DD) packets may be dropped, preventing Full state.
Reference from Huawei HCIE-Datacom Documentation:
Huawei OSPF Configuration Guide - Troubleshooting OSPF Neighbor Issues
HCIE-Datacom Study Material - OSPF Adjacency and Route Synchronization

NEW QUESTION # 133
::1/128 is the IPV6 loopback address

A. False
B. TRUE

Answer: B

NEW QUESTION # 134
A network administrator runs thedisplay telemetry subscriptioncommand on a device to check telemetry subscription information. The command output is as follows:
[~CE] display telemetry subscription
Sub-name : Sub1
Sensor group:
Sensor-name Sample-interval(ms) State
Sensor1 1000 RESOLVED
Destination group:
Dest-name Dest-IP Dest-port State Vpn-name Protocol
Dest1 192.168.56.1 20000 RESOLVED - GRPC
Sub-state : PASSIVE
Total subscription number is : 1
Which of the following statements is incorrect?

A. The subscription mode is static subscription.
B. The device sends sampled data every second.
C. The IP address of the device is 192.168.56.1.
D. The subscription name is Sub1.

Answer: C

Explanation:
Comprehensive and Detailed In-Depth Explanation:
Analyzing the output:
A). The device sends sampled data every second:Correct. Thesample interval is 1000 ms (1 second).
B). The subscription name is Sub1:Correct. Thesubscription nameis clearly shown asSub1.
C). The subscription mode is static subscription:Correct. Since theSub-stateisPASSIVE, it indicates astatic subscription.
D). The IP address of the device is 192.168.56.1:Incorrect. The IP address192.168.56.1shown in the output is thedestination IPwhere the telemetry data is sent, not the IP address of the device itself.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei Telemetry Configuration Guide

NEW QUESTION # 135
What are the ways to divide VLANs in Huawei switches? ( Multi-select)

A. Division based on protocol
B. Division based on QoS
C. Subnetting based on IP.
D. Partitioning based on port
E. Division based on MAC address.

Answer: A,C,D,E

NEW QUESTION # 136
......

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