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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Network Automation Technologies and Practice	17%	- Huawei Automation Solutions 1. API-based network operation and maintenance 2. eSight and iMaster NCE tools 3. Configuration automation and deployment - Automation Foundation 1. Network programming basis and protocols 2. YANG model and data modeling
Advanced Routing and Switching Technologies	37%	- Network Quality and Optimization 1. Traffic engineering and MPLS technology 2. QoS mechanism and deployment - 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
Bearer WAN Planning and Deployment	15%	- High-level Technology Deployment 1. SRv6 principles and deployment 2. Network slicing and service bearing - Bearer Network Architecture 1. Typical bearer network structure and requirements 2. CloudWAN solution and application scenarios
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. CloudCampus solution architecture and features 2. Typical campus network structure and design principles - Campus Network Service Deployment 1. Campus network management and operation 2. WLAN planning and deployment 3. User access management and security

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Huawei HCIE-Datacom V1.0 Sample Questions (Q305-Q310):

NEW QUESTION # 305
IPsec SAs can be established in either manual mode or IKE auto-negotiation mode. Which of the following statements about the two modes is incorrect?

A. SAs established in both manual and IKE auto-negotiation modes can be dynamically updated.
B. In IKE auto-negotiation mode, the encryption and authentication keys required for establishing an SA are generated using the DH algorithm.
C. In manual mode, all parameters (including encryption and authentication keys) required for establishing an IPsec SA need to be manually configured.
D. The lifetime of an SA established in IKE auto-negotiation mode is controlled by the lifetime parameters configured on both ends of the tunnel.

Answer: A

Explanation:
Understanding IPsec SA (Security Association) Establishment
🔹 IPsec (IP Security) provides encrypted communication over IP networks.
🔹 Security Associations (SAs) define encryption, authentication, and key parameters for IPsec tunnels.
Two IPsec SA Modes:
1️⃣ Manual Mode:
All parameters (keys, encryption methods, authentication settings) must be manually configured.
Keys do not change automatically, making it less secure.
2️⃣ IKE (Internet Key Exchange) Auto-Negotiation Mode:
Uses IKE Phase 1 and Phase 2 to automatically negotiate, generate, and exchange keys.
Keys are periodically refreshed, increasing security.
Uses Diffie-Hellman (DH) key exchange for secure key generation.
Why is Answer D Incorrect?
❌ D. SAs established in both manual and IKE auto-negotiation modes can be dynamically updated.
Incorrect: In manual mode, the IPsec SA is static and does not support dynamic updates.
Correct behavior: Only IKE auto-negotiation mode supports dynamic re-keying and SA updates.
✅ Reference: Huawei HCIE-Datacom Guide - IPsec SA Modes and IKE Negotiation

NEW QUESTION # 306
Router RL and Router R2 run BGP both routers are in the AS65234 The router R2 route is present in the BGP routing table of router RI, but not in the P of router R1 road

A. The BGP neighbor relationship is Down
B. With BGP, both routers are in the AS65234 Route cry PD is done by the right big worker
C. Router R1 does not enable BGPMulti-hop D Routing is not optimal
D. By the table, so what causes the problem to occur? A, synchronization is turned off

Answer: C

NEW QUESTION # 307
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
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 # 308
There can be multiple nodes under a route -policy, different node numbers are identified by nodes, and each node can have multiple if-match and apply clauses, which of the following descriptions are wrong ?

A. The relationship between the if-match clauses under each node is "and"
B. The relationship between different nodes is an "and" relationship
C. There is an "or" relationship between different nodes
D. The relationship between the if-match clauses under each node is "or"

Answer: B,D

NEW QUESTION # 309
Which of the following options enables encapsulation and unencapsulation of VXLAN messages?

A. VLANIF
B. VBDIF
C. BD
D. VTEP

Answer: D

NEW QUESTION # 310
......

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