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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: WAN Interconnection Network Planning and Deployment	8%	- WAN Service Optimization 1. WAN security and isolation design 2. WAN link reliability and load balancing - WAN Interconnection Technologies 1. SD-WAN architecture and Huawei solution 2. Traditional WAN connection technologies
Topic 2: 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. Campus network management and operation 2. User access management and security 3. WLAN planning and deployment
Topic 3: 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. Configuration automation and deployment 3. eSight and iMaster NCE tools
Topic 4: Advanced Routing and Switching Technologies	37%	- Advanced Routing Protocols 1. BGP route control, policy and deployment 2. IS-IS protocol principles and deployment 3. OSPF advanced features and optimization - Network Quality and Optimization 1. Traffic engineering and MPLS technology 2. QoS mechanism and deployment - Advanced Switching Technologies 1. Multicast routing and deployment 2. Ethernet protection and reliability technologies 3. VXLAN and EVPN principles and application
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. Typical bearer network structure and requirements 2. CloudWAN solution and application scenarios

>> H12-891_V1.0 Zertifizierungsantworten <<

H12-891_V1.0 Studienmaterialien: HCIE-Datacom V1.0 & H12-891_V1.0 Zertifizierungstraining

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Huawei HCIE-Datacom V1.0 H12-891_V1.0 Prüfungsfragen mit Lösungen (Q203-Q208):

203. Frage
On the bearer WAN shown in the figure,SR (Segment Routing)is deployed, and the controller is used to compute paths. Drag network technologies on the left to the corresponding application locations on the right.

Antwort:

Begründung:

Explanation:
Comprehensive and Detailed In-Depth Explanation:
The diagram shows aWAN networkwhereSegment Routing (SR)is used in conjunction with theiMaster NCEcontroller. The network consists ofData Centers (DCs),Branches,Provider Edge (PE)routers, andRoute Reflectors (RR)withinAS 65600. Let's analyze each network technology and its placement in the scenario.
1. BGP-LS (Border Gateway Protocol - Link State):
Application Location:1 (PE to RR)
BGP-LS is used tocollect and distribute network topology informationfrom theIGP (Interior Gateway Protocol)domain.
It enables theiMaster NCE(controller) to learn about the network topology and SR information from PE routers.
The PE routers send theirlink-state informationto theRRusingBGP-LS.
Why Location 1:
The RR collects topology data from PEs and forwards it to the controller for path computation.
2. BGP (Border Gateway Protocol):
Application Location:2 (RR to iMaster NCE)
Standard BGP is used forroute distributionandnetwork connectivity.
The RR usesBGPto exchange route information with thecontroller(iMaster NCE).
Why Location 2:
TheRRaggregates routes and exchanges them with the iMaster NCE for centralized management.
3. MP-IBGP (Multiprotocol Internal BGP):
Application Location:3 (PE to PE)
MP-IBGP is used toexchange VPNv4 and VPNv6 routesbetween PE routers within thesame AS.
It allows PEs toadvertise VPN routesacross thebackbone network.
Why Location 3:
PEs need to communicate VPN-related information within the AS, ensuring end-to-end connectivity between DCs and branches.
4. BGP SR-Policy/PCEP (Path Computation Element Protocol):
Application Location:4 (iMaster NCE to PE)
BGP SR-Policy andPCEPare used by thecontrollertodistribute SR policiesto the PE routers.
TheiMaster NCEcalculates optimal paths and sends the SR policies to PEs viaBGP SR-PolicyorPCEP.
Why Location 4:
The controller programs theSegment Routing pathsdirectly to the PEs for optimal traffic engineering.
Why This Mapping Is Correct:
The mapping is based on theroles and functions of each protocolwithin theSR-based WAN architecture. The controller uses BGP-LS to learn topology, BGP for route reflection, MP-IBGP for VPN route exchange, and BGP SR-Policy/PCEP for path computation and distribution.

204. Frage
The following information is displayed during OSPF troubleshooting. Based on this information, which of the following is the cause of the failure in establishing an OSPF adjacency relationship?
< Huawei > display ospf error interface GigabitEthernet 0/0/0
OSPF Process 1 with Router ID 10.0.12.2
OSPF error statistics
Interface: GigabitEthernet0/0/0 (10.0.12.2)
General packet errors:
0 : Bad version 0 : Bad checksum
0 : Bad area id 0 : Bad authentication type
0 : Bad authentication key 0 : Unknown neighbor
0 : Bad net segment 0 : Extern option mismatch
0 : Router id confusion
HELLO packet errors:
2 : Netmask mismatch 0 : Hello timer mismatch
0 : Dead timer mismatch 0 : Invalid Source Address

A. The authentication passwords are inconsistent.
B. The area types are inconsistent.
C. The IP address masks of the interfaces are inconsistent.
D. Hello packets are sent at different intervals.

Antwort: C

Begründung:
According to the displayed OSPF error statistics from the Huawei device, the key HELLO packet error shown is:
yaml
CopyEdit
2 : Netmask mismatch
This indicates that the OSPF adjacency formation is failing due to a subnet mask mismatch between the two OSPF neighbors on the corresponding interface (GigabitEthernet 0/0/0). OSPF uses the subnet mask in Hello packets to ensure that neighbors are in the same network. If the masks do not match, OSPF will not form an adjacency.
From the Huawei Official HCIE-Datacom Study Guide (Version 3.0) - under the OSPF Troubleshooting Section:
" Netmask mismatch: If the subnet mask configured on the interfaces of OSPF neighbors does not match, a ' Netmask mismatch ' error occurs. OSPF requires neighbors to be on the same subnet to establish an adjacency. This is a common reason for failure in adjacency formation. " (Reference: Huawei HCIE-Datacom V3.0, OSPF Troubleshooting Chapter, Section 4.2 - OSPF Hello and Adjacency Establishment Issues) Thus, among the given options:
A). Area type inconsistency would result in an area ID mismatch error, not netmask.
B). Authentication mismatch would show a bad authentication key or type error.
D). Hello interval mismatches would trigger a Hello timer mismatch error.
Only C. The IP address masks of the interfaces are inconsistent directly matches the actual error observed:
Netmask mismatch.

205. Frage
On a CloudCampus virtualized campus network, service data enters different VNs from physical networks through edge nodes, and the VN that the data will enter is determined by the VLANs to which users belong.
Which of the following statements about dynamic VLAN authorization is incorrect?

A. When wireless users pass Portal authentication, they join the authorization VLANs delivered to edge nodes.
B. When wired users pass MAC address authentication, they join the authorization VLANs delivered to edge nodes.
C. When wired users pass 802.1X authentication, they join the authorization VLANs delivered to edge nodes.
D. When wireless users pass 802.1X authentication, they join the authorization VLANs delivered to edge nodes.

Antwort: A

Begründung:
Dynamic VLAN Authorization in Huawei CloudCampus
Dynamic VLAN assignmentallows users to be placed into specific VLANsbased on authentication methods, ensuring security and network segmentation.
Correct Explanations:
#A. Wired users using 802.1X authentication receive VLAN assignments dynamically.
After authentication,the access control system (e.g., iMaster NCE-Campus)assigns VLANs dynamically.
#C. Wireless users using 802.1X authentication also receive VLAN assignments.
Similar to wired users,wireless 802.1X authentication allows dynamic VLAN assignmentvia the RADIUS server.
#D. Wired users using MAC authentication can receive VLAN assignments.
If a userdoes not support 802.1X, MAC authentication can still be used to assign VLANs dynamically.
Incorrect Statement Explanation:
#B. When wireless users pass Portal authentication, they join the authorization VLANs delivered to edge nodes.
Wrong!InPortal authentication, VLAN assignmentis not dynamically deliveredbecausePortal authentication typically applies access policies, not VLAN changes.
Dynamic VLAN assignment is mainly used with 802.1X or MAC authentication.
Reference from Huawei HCIE-Datacom Documentation:
Huawei CloudCampus Configuration Guide - Dynamic VLAN Assignment and Authentication HCIE-Datacom Training Material - VLAN Authorization in Virtualized Campus Networks

206. Frage
There is an existing router running OSPF connected to Zone 0 and Zone 1 You configured Zone 1 as a stub zone, what classes does LSA that only operates inside Zone 1 include?

A. I LSA,2 LSA 5 LSA
B. 7 ? LSA
C. 3 ? LSA ? 4 ? LSA
D. 1 ? LSA ? 2 ? LSA
E. 1 LSA,2 LSA 3 LSA

Antwort: E

207. Frage
An existing router running BGP, HW1, has both IBGP neighbors and EBGP neighbors configured on the router. Are the IP Neighbors and EBGP Neighbors described below correctly?

A. EBGP neighbors must be directly connected, otherwise, EBGP-Multi-hop must configure
B. The router will be connected directly from its EBGP IBGP neighbor, otherwise, IBGP-Multi-hop must be configured
C. The router sends BGP updates learned from its IBGP neighbors to its other IBGP neighbors and EPGP neighbors
D. The router sends BGP updates learned from its EBGP neighbors to its other IBGP neighbors and EBGP neighbors
E. IBGP neighbors can establish neighbor relationships through Loopback engagements

Antwort: A,D,E

208. Frage
......

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