H12-891_V1.0 Test Lab Questions - H12-891_V1.0 Test Answers

H12-891_V1.0 Test Lab Questions - H12-891_V1.0 Test Answers


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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section Weight Objectives Campus Network Planning and Deployment 23% - Campus Network Architecture Design

  • 1. Typical campus network structure and design principles
  • 2. CloudCampus solution architecture and features

- Campus Network Service Deployment

  • 1. User access management and security
  • 2. WLAN planning and deployment
  • 3. Campus network management and operation

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. Traditional WAN connection technologies
  • 2. SD-WAN architecture and Huawei solution

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

Advanced Routing and Switching Technologies 37% - Advanced Switching Technologies

  • 1. Multicast routing and deployment
  • 2. VXLAN and EVPN principles and application
  • 3. Ethernet protection and reliability technologies

- 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

Network Automation Technologies and Practice 17% - Huawei Automation Solutions

  • 1. eSight and iMaster NCE tools
  • 2. Configuration automation and deployment
  • 3. API-based network operation and maintenance

- Automation Foundation

  • 1. Network programming basis and protocols
  • 2. YANG model and data modeling

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Huawei HCIE-Datacom V1.0 Sample Questions (Q221-Q226):

NEW QUESTION # 221

The figure shows an L3VPN over an SRv6 BE (Best Effort) network. According to the information displayed on PE2, which of the following statements is incorrect?



  • A. An IBGP peer relationship is established between PE2 and PE1, and PE2 leams the route to 192.168.1.0
  • /24 over an IBGP peer relationship.
  • B. The router ID of the BGP process on the P is 1.0.0.6.
  • C. The instruction type corresponding to FO00:2 :: 1:79 is End.DT4.
  • D. PE2 imports the route 192.168.1.0/24 through the import-route command.

Answer: B

Explanation:

Understanding L3VPN over SRv6 BE Networks

# What is L3VPN over SRv6?

* Layer 3 VPN (L3VPN) allows multiple private routing domains to operate over a shared service provider backbone.

* SRv6 (Segment Routing over IPv6) replaces traditional MPLS labels with IPv6 Segment Identifiers (SIDs).

* Best Effort (BE) mode means that no explicit Traffic Engineering (TE) constraints are applied.

How Routing Works in This Scenario

Key Components in the Network:

* PE1 & PE2 (Provider Edge routers): Connect customer networks (CE1 & CE2).

* P Router (Core Router): Provides transit between PE routers over SRv6.

* SRv6 SID FC00:2::1:79: Used for VPN routing at PE2 (End.DT4 function).

Step-by-Step Route Learning Process:

1## PE1 advertises the 192.168.1.0/24 VPN route to PE2 using iBGP VPNv4.2## PE2 receives the route with next-hop 2001:DB8:1::1 (PE1).3## PE2 installs the route with the SRv6 Prefix-SID FC00:2::1:79 (End.DT4).4## The route is imported into the VRF using the import-route command.

Analysis of Each Answer Choice

# A. An IBGP peer relationship is established between PE2 and PE1, and PE2 learns the route to

192.168.1.0/24 over an IBGP peer relationship.

* Correct: The routing table output confirms that PE2 receives the route via iBGP from PE1.

# B. The instruction type corresponding to FC00:2::1:79 is End.DT4.

* Correct:

* End.DT4 is an SRv6 function that represents a Layer 3 VPN endpoint (VRF routing).

* PE2 uses End.DT4 to process VPN traffic for 192.168.1.0/24.

# C. PE2 imports the route 192.168.1.0/24 through the import-route command.

* Correct:

* The import-route command allows BGP-learned routes to be added to the local routing table (VRF).

# D. The router ID of the BGP process on the P router is 1.0.0.6. (Incorrect Statement)

* Incorrect:

* The P router is a transit router and does NOT run BGP for VPNv4 routes.

* The router ID of PE2 is 1.0.0.11, and the route originator is 1.0.0.2 (likely PE1).

* P routers in an SRv6 BE network do NOT need BGP router IDs.

D: (The router ID of the BGP process on the P is 1.0.0.6.)

# Reference: Huawei HCIE-Datacom Guide - SRv6 L3VPN Routing and End.DT4 Function Real-World Application:

* Service Provider Networks: Uses SRv6 to replace MPLS in large-scale VPN deployments.

* 5G Transport Networks: Implements SRv6 L3VPN for high-speed, low-latency services.


NEW QUESTION # 222

Which of the following channels are involved in the Huawei SD-WAN Solution?

  • A. Orchestration channel
  • B. Control channel
  • C. Data channel
  • D. Management channel

Answer: A,B,C,D

Explanation:

Comprehensive and Detailed In-Depth Explanation:

TheHuawei SD-WAN Solutioninvolves four types of channels to ensure smooth and efficient network operation:

Management Channel (A):Used for managing and monitoring SD-WAN devices. It facilitates communication between theiMaster NCE-Campus controllerand SD-WAN devices.

Control Channel (B):Responsible for transmittingcontrol plane informationsuch as routing updates and protocol control messages.

Data Channel (C):Carries actualuser data trafficover the SD-WAN network.

Orchestration Channel (D):Used forservice orchestration, configuration delivery, and policy management.

All four channels work together to provide comprehensive network management, data transmission, and service orchestration in an SD-WAN environment.


NEW QUESTION # 223

Regarding Policy Routing, the following description error is ?( Single choice questions).

  • A. Interface policy routing only takes effect for forwarded packets, but has no effect on packets sent locally.
  • B. If the message matches the permit table entry in the interface policy route , the message must be forwarded according to the next hop specified by the interface policy route
  • C. Interface policy routing is only supported for application in the inbound direction of an interface.
  • D. When configuring local policy routing, if two next hop and two outbound interfaces are set in the policy at the same time, packet forwarding only distributes the load between the two outbound interfaces.

Answer: B


NEW QUESTION # 224

Drag the IPsec functions on the left to the corresponding function description on the right.


Answer:

Explanation:



NEW QUESTION # 225

In the following figure, R1, R2, R3, and R4 all belong to OSPF area 0. The link costs are marked in the figure. The Loopback0 addresses of R1, R2, R3, and R4 are advertised to OSPF. R1, R2, and R3, which are R4 clients, use Loopback0 to establish an iBGP peer relationship with R4. The directly connected network segment 172.20.1.4/32 of R4 is advertised to BGP. Which of the following statements are correct about the direction of traffic from R1 to 172.20.1.4/32?


  • A. The preferred path is R1-R3-R4.
  • B. The preferred path is R1-R2-R4.
  • C. Packet loss occurs during both the power-off and startup processes of R3.
  • D. If the stub router on-startup command is run on R3, packet loss occurs during the power-off process of R3 but no packet loss occurs during the startup process of R3.

Answer: A,D

Explanation:

Let's analyze the scenario and each statement carefully based on OSPF path selection and BGP behavior in Huawei routers.

✅ Option A: The preferred path is R1-R3-R4.

According to the OSPF cost values:

R1-R3-R4: Cost = 1 + 1 = 2

R1-R2-R4: Cost = 2 + 2 = 4

OSPF chooses the lowest-cost path to reach a destination. Therefore, R1 will prefer the R1-R3-R4 path to reach 172.20.1.4/32.

Huawei Datacom Reference:

"OSPF selects routes based on the shortest path calculated using link costs. The router always selects the path with the lowest cost." (Source: HCIE-Datacom Study Guide v3.0 - OSPF Path Selection, Chapter 5)

✅ Option B: If the stub router on-startup command is run on R3, packet loss occurs during the power-off process of R3 but no packet loss occurs during the startup process of R3.

When R3 is powered off, OSPF needs to reconverge, which causes temporary packet loss.

When R3 starts up, it will advertise itself as a stub router using the stub-router on-startup command. This tells OSPF not to use R3 as a transit path during the startup period, thus preventing traffic blackholing.

Huawei Datacom Reference:

"stub-router on-startup command prevents a newly started router from being used as a transit node by OSPF, allowing routing to remain stable during convergence." (Source: HCIE-Datacom Study Guide v3.0 - OSPF Stub Router Functionality, Chapter 6.2)

❌ Option C: The preferred path is R1-R2-R4.

This is incorrect because the OSPF path cost via R2 is higher (4) than the cost via R3 (2).

❌ Option D: Packet loss occurs during both the power-off and startup processes of R3.

Incorrect. As explained above, when the stub-router on-startup command is used, packet loss is avoided during startup, but still occurs during power-off since the alternate path requires convergence.


NEW QUESTION # 226

......

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