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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Network Automation Technologies and Practice	17%	- Automation Foundation 1. Network programming basis and protocols 2. YANG model and data modeling - Huawei Automation Solutions 1. Configuration automation and deployment 2. API-based network operation and maintenance 3. eSight and iMaster NCE tools
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. 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
Advanced Routing and Switching Technologies	37%	- Network Quality and Optimization 1. QoS mechanism and deployment 2. Traffic engineering and MPLS technology - Advanced Routing Protocols 1. BGP route control, policy and deployment 2. OSPF advanced features and optimization 3. IS-IS protocol principles and deployment - Advanced Switching Technologies 1. Multicast routing and deployment 2. Ethernet protection and reliability technologies 3. VXLAN and EVPN principles and application
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

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Huawei HCIE-Datacom V1.0 Sample Questions (Q30-Q35):

NEW QUESTION # 30
Which of the following statements does not cause the flapping of a VRRP group?

A. Too small interval between Advertisement packet transmissions
B. Packet loss on an interface of the backup device
C. Inconsistent preemption delay settings
D. Flapping on the link transmitting VRRP Advertisement packets

Answer: C

Explanation:
VRRP (Virtual Router Redundancy Protocol) and Flapping
VRRP ensures gateway redundancy by allowing multiple routers to work together as a virtual router.
Flapping occurs when the master and backup routers frequently switch roles.
Causes of VRRP Flapping:
# A. Too small interval between Advertisement packet transmissions - Can cause flapping
* If the Advertisement interval is too short, frequent VRRP state changes can occur.
# C. Packet loss on an interface of the backup device - Can cause flapping
* If the backup router loses VRRP packets, it might assume the master is down and initiate an election.
# D. Flapping on the link transmitting VRRP Advertisement packets - Can cause flapping
* If the link used for VRRP experiences instability, packets may be lost, triggering VRRP role changes.
Incorrect Answer Explanation:
# B. Inconsistent preemption delay settings - Does NOT cause VRRP flapping
* Preemption delay only affects when a router takes over as master after recovering from a failure.
* It does not directly cause flapping because the role change happens only after a delay, preventing frequent transitions.
Reference from Huawei HCIE-Datacom Documentation:
* Huawei VRRP Configuration Guide - Preventing VRRP Flapping
* HCIE-Datacom Study Material - VRRP Timers and Stability

NEW QUESTION # 31
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 device sends sampled data every second.
B. The IP address of the device is 192.168.56.1.
C. The subscription mode is static subscription.
D. The subscription name is Sub1.

Answer: B

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 # 32
The following statement about isis protocol LSP messages is correct

A. Reducing the minimum interval at which LSPs are sent per port can speed up the diffusion of LSPs.
B. By configuring an LSP-generated smart timer, the timer automatically adjusts the delay time based on the frequency at which the routing information changes
C. As link status information increases, the packet length of the LSP can be increased so that each ISP can carry more information.
D. The isP rapid diffusion feature, which first diffuses out LSPs that are smaller than a specified number , speeding up the synchronization process of LSDB

Answer: A,B,C,D

NEW QUESTION # 33
Which of the following technologies can be used to measure performance based on actual service traffic in Huawei's CloudWAN solution?

A. BGP FlowSpec
B. TWAMP
C. Telemetry
D. iFIT

Answer: D

Explanation:
Understanding Performance Measurement in Huawei CloudWAN
Huawei CloudWAN enables intelligent traffic management, real-time network monitoring, and automated operations.
🔹 Traditional Performance Monitoring Methods
TWAMP (Two-Way Active Measurement Protocol) → Measures latency and jitter by injecting test traffic.
Telemetry → Provides real-time network visibility, but does not measure actual service traffic performance.
BGP FlowSpec → Used for DDoS mitigation, not performance measurement.
🔹 iFIT (In-situ Flow Information Telemetry)
✅ iFIT is a next-generation performance monitoring technology that measures:
Real service traffic performance (latency, jitter, packet loss) in real time.
Packet forwarding behavior at each hop without injecting synthetic traffic.
Path delay and service degradation detection.
Why is Answer D Correct?
✅ iFIT provides real-time network performance monitoring based on actual service traffic.
✅ Unlike TWAMP, iFIT does not require probe packets, reducing overhead.
Real-World Application:
5G Transport Networks: Ensures low-latency paths for ultra-reliable services.
CloudWAN Optimization: Detects network congestion without affecting user traffic.
✅ Reference: Huawei HCIE-Datacom Guide - iFIT and Intelligent Performance Monitoring

NEW QUESTION # 34
On a CloudCampus virtualized campus network, service data enters different VNs from physical networks through edge nodes, and the VN that the data will enter is determined by the VLANs to which users belong. Which of the following statements about dynamic VLAN authorization is incorrect?

A. When wired users pass MAC address authentication, they join the authorization VLANs delivered to edge nodes.
B. When wireless users pass Portal authentication, they join the authorization VLANs delivered to edge nodes.
C. When wired users pass 802.1X authentication, they join the authorization VLANs delivered to edge nodes.
D. When wireless users pass 802.1X authentication, they join the authorization VLANs delivered to edge nodes.

Answer: B

Explanation:
Dynamic VLAN Authorization in Huawei CloudCampus
Dynamic VLAN assignment allows users to be placed into specific VLANs based on authentication methods, ensuring security and network segmentation.
Correct Explanations:
# A. Wired users using 802.1X authentication receive VLAN assignments dynamically.
* After authentication, the access control system (e.g., iMaster NCE-Campus) assigns VLANs dynamically.
# C. Wireless users using 802.1X authentication also receive VLAN assignments.
* Similar to wired users, wireless 802.1X authentication allows dynamic VLAN assignment via the RADIUS server.
# D. Wired users using MAC authentication can receive VLAN assignments.
* If a user does not support 802.1X, MAC authentication can still be used to assign VLANs dynamically.
Incorrect Statement Explanation:
# B. When wireless users pass Portal authentication, they join the authorization VLANs delivered to edge nodes.
* Wrong! In Portal authentication, VLAN assignment is not dynamically delivered because Portal authentication typically applies access policies, not VLAN changes.
* Dynamic VLAN assignment is mainly used with 802.1X or MAC authentication.
Reference from Huawei HCIE-Datacom Documentation:
* Huawei CloudCampus Configuration Guide - Dynamic VLAN Assignment and Authentication
* HCIE-Datacom Training Material - VLAN Authorization in Virtualized Campus Networks

NEW QUESTION # 35
......

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