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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: 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. IS-IS protocol principles and deployment 2. OSPF advanced features and optimization 3. BGP route control, policy and deployment - Advanced Switching Technologies 1. Ethernet protection and reliability technologies 2. VXLAN and EVPN principles and application 3. Multicast routing and deployment
Topic 2: 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. Campus network management and operation 3. User access management and security
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 link reliability and load balancing 2. WAN security and isolation design
Topic 4: 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. YANG model and data modeling 2. Network programming basis and protocols
Topic 5: 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

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Huawei HCIE-Datacom V1.0 Sample Questions (Q16-Q21):

NEW QUESTION # 16
What messages does an NMS (Network Management Station) running SNMPv1 send to the agent?

A. Get,Set ? Getnext
B. Get Trap
C. Get,Set ? GetBulk
D. Get,Set,Getnext ? GetBulk
E. Trap,Get ? Set

Answer: A

NEW QUESTION # 17
When designing IGP routes for an enterprise bearer WAN, ensure that the metric of aggregation-layer links is smaller than that of access-layer links, so that data can be preferentially forwarded over aggregation-layer links.

A. TRUE
B. FALSE

Answer: A

Explanation:
IGP Metric Design in Enterprise WANs
In an enterprise bearer WAN, routing metrics determine path selection. The aggregation layer connects multiple access-layer devices to the core network, so it should have a lower metric to:
# Ensure traffic is forwarded through higher-capacity aggregation links instead of lower-bandwidth access links.# Optimize traffic flow, reduce congestion, and improve network efficiency.# Enhance reliability by preferring more stable aggregation links.
IGP Routing Protocols Considerations:
* OSPF: Lower cost values indicate preferred paths.
* IS-IS: Lower link metrics result in preferred forwarding paths.
Reference from Huawei HCIE-Datacom Documentation:
* Huawei IGP Design Guide - Enterprise WAN Routing Optimization
* HCIE-Datacom Training Material - Metric Calculation and Path Selection in OSPF/IS-IS

NEW QUESTION # 18
After the reset isis all command is run, the specified IS-IS process is reset, and all involved IS-IS neighbor relationships are re-established; however, IS-IS statistics are not cleared.

A. FALSE
B. TRUE

Answer: A

Explanation:
Comprehensive and Detailed Explanation:
Thereset isis allcommand resets theentire IS-IS process, including:
#Neighbor adjacencies
#LSDB (Link-State Database)
#All IS-IS-related statistics
Key Points:
This commandresets IS-IS completely, causingtemporary route convergence delays.
All IS-IS statistics are clearedbecause the process restarts from scratch.
Since the question states thatIS-IS statistics are not cleared, which is incorrect, the correct answer isFALSE.
#Reference:Huawei HCIE Datacom - IS-IS Troubleshooting and Reset Commands

NEW QUESTION # 19
Regarding the description of the encapsulation format of the labels in MPLS, the correct one is ?

A. label in the S field, lbit Used to identify whether the label is a bottom label, and a value of 1 indicates that it is the penultimate label
B. The total length of an MPLS single tag is 4 bytes (32 bits).
C. The TTL field in the label has a similar meaning to the TTL (Time To Live) in the IP packet, and also has the effect of preventing loops
D. For Ethernet, PPP packets, the tag stack is like a "cushion layer", located between the layer 2 header and the data, and when there is a VLAN tag, the MPLS header is placed on the Ether head and VLANtag between

Answer: B,C

NEW QUESTION # 20
Which of the following inter-AS MPLS L3VPN solutions need VPN user data packets to carry MPLS labels when being forwarded between ASs?

A. Option D
B. Option A
C. Option B
D. Option C

Answer: A,C

Explanation:
There are three standard inter-AS MPLS VPN options, as per RFC 4364:
Option A (Back-to-Back VRF):
VRFs are directly connected between ASBRs using routing exchange (like static/BGP).
No label switching between ASs - no MPLS label needed between ASs.
Option B (EBGP Label Exchange):
ASBRs exchange labeled VPNv4 routes via EBGP.
One MPLS label is required - MPLS forwarding across AS boundary is used.
Option C (End-to-End LSP):
Full end-to-end LSP is created across ASs.
MPLS labels are definitely used end-to-end, even between ASs.
Option D (Commonly vendor-specific extensions based on Option B/C):
Similar to Option C - requires MPLS labels.
So:
B . Option B - needs MPLS label ✅
D . Option D - also needs MPLS label ✅
A . Option A - no MPLS label ❌
C . Option C - also uses MPLS label ✅, but not listed as an answer option in this question format (should have been).
Assuming valid options are A, B, D, the correct ones needing MPLS labels are:
Correct answers: B, D

NEW QUESTION # 21
......

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