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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: 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
Topic 2: Campus Network Planning and Deployment	23%	- Campus Network Service Deployment 1. User access management and security 2. WLAN planning and deployment 3. Campus network management and operation - Campus Network Architecture Design 1. Typical campus network structure and design principles 2. CloudCampus solution architecture and features
Topic 3: 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
Topic 4: Advanced Routing and Switching Technologies	37%	- Advanced Routing Protocols 1. BGP route control, policy and deployment 2. OSPF advanced features and optimization 3. IS-IS protocol principles and deployment - Network Quality and Optimization 1. Traffic engineering and MPLS technology 2. QoS mechanism and deployment - Advanced Switching Technologies 1. VXLAN and EVPN principles and application 2. Multicast routing and deployment 3. Ethernet protection and reliability technologies
Topic 5: Network Automation Technologies and Practice	17%	- Automation Foundation 1. YANG model and data modeling 2. Network programming basis and protocols - Huawei Automation Solutions 1. API-based network operation and maintenance 2. eSight and iMaster NCE tools 3. Configuration automation and deployment

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Huawei HCIE-Datacom V1.0 Sample Questions (Q192-Q197):

NEW QUESTION # 192
To obtain the token ID of iMaster NCE, you need to send an HTTP request using the following Python code to invoke an iMaster NCE RESTful API:
Which of the following statements is incorrect?

A. The request body is in JSON format.
B. The HTTP request uses the GET method to query the token value.
C. Token resources are located at https://139.9.213.72:18002/controller/v2/tokens.
D. You can run print(r.json()) to display the response message sent from the server.

Answer: B

Explanation:
Comprehensive and Detailed
✔ Breakdown of the Python Code:
✅ (A) Correct → The function r.json() can be used to display the server response (token details).
✅ (B) Correct → The token request URL is correct.
✅ (D) Correct → The request body is in JSON format (json={"userName": nbi_name, "password": nbi_pwd"}).
❌ (C) Incorrect → The request uses POST, not GET (requests.post() is explicitly called).
📖 Reference: Huawei HCIE Datacom - iMaster NCE RESTful API Authentication

NEW QUESTION # 193
Regarding the Stub region in the OSPF protocol, the following statement is correct.

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

Answer: A,B,C,D

NEW QUESTION # 194
Which of the following statements regarding OSPF neighbor relationship faults is incorrect?

A. The Attempt state indicates that the router does not send unicast Hello packets to configured neighbors.
B. The ExStart state indicates that two neighbor routers have inconsistent MTUs or the same OSPF Router ID (RID).
C. For non-DR and non-BDR routers on an Ethernet link, the 2-Way state is acceptable.
D. The Init state indicates that the router has received Hello packets from its neighbors, but the received Hello packets do not contain the OSPF RID of the receiving router.

Answer: A

Explanation:
Understanding OSPF Neighbor States
OSPF (Open Shortest Path First) establishes neighbor relationships through several states:
1## Down: No Hello packets received.2## Init: Router receives Hello packets but its own Router ID is missing in the received packets.3## 2-Way: Routers see each other in Hello packets. (Stable state for non- DR/non-BDR routers).4## ExStart: Routers start exchanging LSAs but may face MTU mismatches.5## Exchange: Routers send Database Description (DBD) packets to synchronize link-state databases.6## Loading: Routers exchange Link-State Requests (LSRs) & Updates (LSUs) to fully sync.7## Full: Routers are fully synchronized.
Analysis of the Answer Choices
# A. For non-DR and non-BDR routers on an Ethernet link, the 2-Way state is acceptable.
* Correct: Non-DR/Non-BDR routers remain in 2-Way state since they don't need to form full adjacency.
# B. The Init state indicates that the router has received Hello packets from its neighbors, but the received Hello packets do not contain the OSPF RID of the receiving router.
* Correct: If an OSPF router receives a Hello but does not see its own Router ID, it stays in the Init state.
# C. The ExStart state indicates that two neighbor routers have inconsistent MTUs or the same OSPF Router ID (RID).
* Correct: If MTUs mismatch or RIDs conflict, the DBD exchange fails, causing routers to remain in ExStart state.
# D. The Attempt state indicates that the router does not send unicast Hello packets to configured neighbors.
* Incorrect:
* In Attempt state, routers send unicast Hello packets to manually configured neighbors (common in NBMA networks).
* If no Hello responses are received, they remain in Attempt state, but they DO send Hellos.
Real-World Application
* OSPF Troubleshooting: Identifying routers stuck in Init or ExStart states can point to MTU mismatches or neighbor misconfigurations.
* NBMA Networks (Frame Relay, DMVPN): Manually configured neighbors may stay in Attempt state if Hello packets are lost.
# Reference: Huawei HCIE-Datacom Study Guide - OSPF Neighbor States & Troubleshooting

NEW QUESTION # 195
Telemetry data must be encoded in GPB binary format. This format reduces the number of bytes in telemetry messages and improves the transmission efficiency compared with messages encoded in JSON format.

A. TRUE
B. FALSE

Answer: B

Explanation:
Understanding Telemetry Encoding Formats
# What is Telemetry?
* Telemetry is a real-time network monitoring method that provides high-frequency data collection.
* Used in AI-driven networks for predictive analytics and automation.
# Common Telemetry Encoding Formats:
# GPB (Google Protocol Buffers)
* Highly efficient binary format that reduces message size and CPU overhead.
* Commonly used for high-speed, real-time analytics.
# JSON (JavaScript Object Notation)
* Human-readable format, widely used in RESTful APIs.
* Less efficient than GPB in high-speed telemetry but easier to debug.
# Why is the Answer FALSE?# GPB is not mandatory; JSON can also be used in telemetry.# Huawei supports both GPB and JSON telemetry encoding formats.
Real-World Application:
* Cloud Networking: Uses GPB for fast data collection and JSON for API-based telemetry visualization.
* AI-Driven Networks: High-speed AI analytics leverage GPB encoding for efficiency.
# Reference: Huawei HCIE-Datacom Guide - Telemetry Encoding Formats and Data Collection

NEW QUESTION # 196
Huawei's two switch SWA, SWB is connected together through 7 Ethernets, and static route aggregation is configured, and the corresponding ports on the switch SWA are E1/0/1, E1/02, E1/0/3, E1/0/4, E1/ 0/5, E1/0/6, E1/0/7, configured sequentially as if switch SWA, SWB Each aggregation group supports only 6 ports.

A. With the same configuration across ports, the Ethemet 1/0/7 port is the aggregate group Unselected port
B. With the same configuration of each port, the Ethemet1/0/1 port is the aggregation group Unselected port
C. With the same configuration of each port, the Ethemet 1/0/6 port is the aggregate group Unselected port
D. With the same configuration of each port, SWA randomly selects one of the 7 ports as the aggregate group Unselected port

Answer: A

NEW QUESTION # 197
......

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