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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Advanced Routing and Switching Technologies	37%	- Advanced Switching Technologies 1. Ethernet protection and reliability technologies 2. Multicast routing and deployment 3. VXLAN and EVPN principles and application - Advanced Routing Protocols 1. IS-IS protocol principles and deployment 2. OSPF advanced features and optimization 3. BGP route control, policy and deployment - Network Quality and Optimization 1. Traffic engineering and MPLS technology 2. QoS mechanism and deployment
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. SRv6 principles and deployment 2. Network slicing and service bearing
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. Campus network management and operation 2. User access management and security 3. WLAN planning and deployment
WAN Interconnection Network Planning and Deployment	8%	- WAN Interconnection Technologies 1. SD-WAN architecture and Huawei solution 2. Traditional WAN connection technologies - WAN Service Optimization 1. WAN security and isolation design 2. WAN link reliability and load balancing
Network Automation Technologies and Practice	17%	- Huawei Automation Solutions 1. Configuration automation and deployment 2. eSight and iMaster NCE tools 3. API-based network operation and maintenance - Automation Foundation 1. YANG model and data modeling 2. Network programming basis and protocols

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Huawei HCIE-Datacom V1.0 Sample Questions (Q224-Q229):

NEW QUESTION # 224
Which of the following commands needs to be run in the BGP view to enable a VPN instance to advertise IP routes to the BGP-EVPN address family?

A. advertise l2vpn evpn
B. advertise irb
C. advertise irbvfi
D. advertise vpnv4

Answer: A

Explanation:
In BGP EVPN configuration forVXLAN-based networks, Huawei uses the command:
[bgp] advertise l2vpn evpn
This command enables the BGP process toadvertise routes from a VPN instance into the EVPN (L2VPN) address family, which is used for VXLAN control-plane operations like MAC/IP advertisement.
Option A (advertise irbvfi)- invalid command.
Option B (advertise vpnv4)- used for MPLS VPNs, not EVPN.
Option C (advertise irb)- not a recognized Huawei command.
Option Dis the correct and officially used command.
Correct answer: D. advertise l2vpn evpn

NEW QUESTION # 225
According to the following information displayed on a router, which of the following are the causes of the failure in establishing an OSPF adjacency relationship?
OSPF error statistics:
* 1: Hello timer mismatch
* 0: Netmask mismatch
* 0: Bad checksum
* 0: Bad authentication type
* 0: Unknown neighbor
* 0: Extern option mismatch

A. Hello packets are sent at different intervals.
B. The area types are inconsistent.
C. The IP address masks of the interfaces are inconsistent.
D. The area IDs are inconsistent.

Answer: A,D

Explanation:
Comprehensive and Detailed Explanation:
The OSPF error output shows:# Hello timer mismatch (1 error) # Hello intervals must match for adjacency formation (A) ## No Netmask mismatch errors # Subnet masks are consistent, so option C is incorrect ## No Extern option mismatch # No evidence of area type inconsistency (option D) ## If area IDs were mismatched, adjacency would not form (option B is correct) # Thus, the correct answers are A and B.
# Reference: Huawei HCIE Datacom - OSPF Troubleshooting

NEW QUESTION # 226
Which of the following scenarios is not suitable for deploying interface policy routing?

A. The traffic accessed by the intranet and the extranet to the side-mounted security detection device is pulled on the core switch
B. In the scenario of multiple ISP egresses of enterprise networks, different network segments of the intranet access the Internet through different ISP egresses
C. Modify the next hop of locally originating traffic
D. Pull the traffic of the intranet and the Internet accessing each other on the core switch to the AC device attached to the side

Answer: C

NEW QUESTION # 227
Regarding the Stub region in the OSPF protocol, the following statement is correct.

A. ASBR cannot exist in the Stub zone
B. Backbone zones cannot be configured as Stub zones
C. Virtual connections cannot traverse the Stub region
D. Type7 LSA injection is not allowed in the Stub zone

Answer: A,B,C,D

NEW QUESTION # 228
/R1Jospf1lRL-osp- jarea.2[RLospf-1-arca-0002]network1001310000 As shown in the configuration, the administrator configured OSPF but RI on R1 You cannot learn routes for other routing rings. Then the possible cause is the question).

A. This router is configured with a different zone ID than its neighbor router's zone ID
B. This router does not have authentication features configured, but neighbor routers configure authentication features
C. This router does not have an OSPF process number configured
D. The declared network address of this router does not match the interface mask

Answer: A,B

NEW QUESTION # 229
......

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