H12-891_V1.0 Antworten, H12-891_V1.0 PDF Testsoftware

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Huawei H12-891_V1.0 Exam Syllabus Topics:

SectionWeightObjectives
Network Automation17%- NCE (Network Cloud Engine)
  • 1. Deployment
  • 2. Architecture
- Automation Technologies
  • 1. RESTful API
  • 2. Python Scripting
  • 3. NETCONF/YANG
  • 4. Ansible
- iMaster NCE
  • 1. Intent-Driven Networking
Advanced Routing and Switching Technology37%- BGP
  • 1. Path Selection
  • 2. Routing Policies
  • 3. Basic Concepts
  • 4. Route Aggregation
  • 5. Configurations and Troubleshooting
- Route Control
  • 1. IP Prefix List
  • 2. ACL
  • 3. Route Filtering
  • 4. Route-policy
- Ethernet Switching
  • 1. Stack & CSS
  • 2. VXLAN
  • 3. VLAN
  • 4. STP/RSTP/MSTP
- OSPF
  • 1. Area Types
  • 2. Basic Concepts
  • 3. LSA Types
  • 4. Configurations and Troubleshooting
  • 5. Route Calculation
- IS-IS
  • 1. Basic Concepts
  • 2. Network Types
  • 3. Route Leaking
  • 4. Configurations and Troubleshooting
  • 5. Addressing
- MPLS
  • 1. Configurations
  • 2. Basic Concepts
  • 3. LDP
  • 4. MPLS TE
  • 5. MPLS VPN
Bearer WAN Planning and Deployment15%- Traffic Engineering
  • 1. RSVP-TE
  • 2. SR-TE
  • 3. Flex-Algo
- SR (Segment Routing)
  • 1. SR-MPLS
  • 2. SRv6
- VPN Services
  • 1. L3VPN
  • 2. EVPN
WAN Interconnection Network Planning and Deployment8%- Inter-AS VPN
  • 1. Option B
  • 2. Option C
  • 3. Option A
- MPLS VPN
  • 1. Hub-Spoke
  • 2. Full-Mesh
- SD-WAN
  • 1. Architecture
  • 2. Orchestrator
Campus Network Planning and Deployment23%- Underlay Network
  • 1. Physical Layer Design
  • 2. IP Address Planning
- Campus Network Architecture
  • 1. Hierarchical Design
  • 2. Spine-Leaf Architecture
- Network Services
  • 1. QoS
  • 2. Network Security
  • 3. WLAN
- Overlay Network (VXLAN)
  • 1. VXLAN Gateway
  • 2. BGP EVPN

>> H12-891_V1.0 Antworten <<

H12-891_V1.0 PDF Testsoftware - H12-891_V1.0 Schulungsunterlagen

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Huawei HCIE-Datacom V1.0 H12-891_V1.0 Prüfungsfragen mit Lösungen (Q234-Q239):

234. Frage
When judging the old and new LSA, the serial number parameter and the age parameter are used , and the following two parameters are correct for ?( Multiple choice questions).

Antwort: B,C


235. Frage
OSPFv3 uses the same route advertisement method as OSPFv2: advertising is done through the network command in the OSPFv3 area view.

Antwort: B


236. Frage
As shown in the figure, PE1 establishes an EVPN peer relationship with each of PE2 and PE3. When the network is initialized, CE1 sends an ARP request packet.

Which of the following statements are correct about how a PE processes the packet?

Antwort: A,C,D

Begründung:
Understanding EVPN (Ethernet VPN) and ARP Request Handling
# What is EVPN?
* EVPN (Ethernet VPN) is a BGP-based control plane for VXLAN that improves Layer 2 & Layer 3 network scalability.
* Eliminates flood-and-learn behavior using BGP MAC/IP advertisement routes.
# Why is an ARP Request Sent?
* When CE1 (192.168.1.1/24) wants to communicate with CE2 (192.168.1.2/24), it sends an ARP request to discover the MAC address of CE2.
# How Does EVPN Process the ARP Request?1## PE1 receives the ARP request from CE1.2## PE1 sends a MAC/IP advertisement route (Type 2 EVPN route) to inform PE2 and PE3 of CE1's MAC address.3## PE1 forwards the ARP request as BUM (Broadcast, Unknown unicast, and Multicast) traffic to PE2 and PE3.4## PE3 (Designated Forwarder - DF) forwards the packet to CE2.5## PE2 (Non-DF) does NOT forward the packet to avoid loops.
Analysis of the Answer Choices:
# A. When forwarding the packet to PE3, PE1 needs to add the BUM traffic label allocated by PE3 to the packet.
* Correct:
* BUM (Broadcast, Unknown Unicast, Multicast) traffic in EVPN is encapsulated with a special label assigned by the receiving PE.
* PE1 adds the BUM traffic label for PE3 before sending the ARP request.
# B. PE1 sends a MAC/IP advertisement route carrying the MAC address of CE1.
* Correct:
* EVPN Type 2 MAC/IP advertisement routes are sent to inform other PEs of CE1's MAC/IP binding.
# C. PE2 forwards the packet to CE1.
* Incorrect:
* PE2 is the Non-Designated Forwarder (Non-DF) and does NOT forward BUM traffic to avoid loops.
# D. PE3 forwards the packet to CE1.
* Correct:
* PE3 is the Designated Forwarder (DF) for this segment, meaning it forwards the ARP request to CE2.
# Reference: Huawei HCIE-Datacom Guide - EVPN BGP MAC/IP Advertisement and BUM Traffic Handling Real-World Application:
* Data Center Interconnect (DCI): EVPN prevents excessive ARP flooding across VXLAN networks.
* Enterprise Campus Networks: Uses EVPN VXLAN to scale Layer 2 connectivity across multiple locations.


237. Frage
During the migration test, which of the following indicates that the test is completed?

Antwort: A

Begründung:
Comprehensive and Detailed In-Depth
During a network migration test, it is crucial not only to verify that the network itself is functioning correctly but also to ensure that upper-layer application services are running properly on the newly migrated network. Migration testing aims to confirm that the transition has not disrupted service functionality.
Option A and C focus solely on network performance, which is necessary but insufficient.
Option B refers to command outputs, which are technical checks and do not guarantee service continuity.
Option D correctly identifies that successful migration is indicated by proper operation of upper-layer application services, as the primary purpose of a network is to support these applications.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei Network Migration Best Practices


238. Frage
OSPF is a mature protocol and is unlikely to have route computation errors in a regular networking environment under correct configurations. Which of the following statements are correct about the possible causes preventing an OSPF neighbor relationship from entering Full state?

Antwort: A,B,C,D

Begründung:
For OSPF neighbors to reach Full state, they must exchange LSAs (Link State Advertisements) properly and synchronize their databases.
Possible Causes Preventing OSPF from Entering Full State:
✅ A. A link works abnormally
If the physical or Layer 2 link is unstable, OSPF Hello packets may be lost, preventing the Full state.
✅ B. The OSPF network types on both ends of the link are inconsistent
OSPF network types (Broadcast, P2P, NBMA, etc.) must match on both ends.
Example: If one router is P2P and the other is Broadcast, adjacency issues occur.
✅ C. The router IDs of neighbors are the same
Router ID conflicts prevent OSPF adjacencies from forming.
Each router must have a unique Router ID.
✅ D. The OSPF MTU values of interfaces on both ends of the link are different If MTU settings do not match, OSPF Database Description (DD) packets may be dropped, preventing Full state.
Reference from Huawei HCIE-Datacom Documentation:
Huawei OSPF Configuration Guide - Troubleshooting OSPF Neighbor Issues
HCIE-Datacom Study Material - OSPF Adjacency and Route Synchronization


239. Frage
......

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