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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
WAN Interconnection Network Planning and Deployment	8%	- Inter-AS VPN 1. Option A 2. Option B 3. Option C - SD-WAN 1. Orchestrator 2. Architecture - MPLS VPN 1. Full-Mesh 2. Hub-Spoke
Network Automation	17%	- iMaster NCE 1. Intent-Driven Networking - NCE (Network Cloud Engine) 1. Deployment 2. Architecture - Automation Technologies 1. RESTful API 2. NETCONF/YANG 3. Ansible 4. Python Scripting
Campus Network Planning and Deployment	23%	- Campus Network Architecture 1. Spine-Leaf Architecture 2. Hierarchical Design - Network Services 1. Network Security 2. WLAN 3. QoS - Underlay Network 1. Physical Layer Design 2. IP Address Planning - Overlay Network (VXLAN) 1. VXLAN Gateway 2. BGP EVPN
Advanced Routing and Switching Technology	37%	- Ethernet Switching 1. VXLAN 2. Stack & CSS 3. VLAN 4. STP/RSTP/MSTP - BGP 1. Path Selection 2. Basic Concepts 3. Route Aggregation 4. Configurations and Troubleshooting 5. Routing Policies - MPLS 1. LDP 2. Basic Concepts 3. MPLS VPN 4. Configurations 5. MPLS TE - IS-IS 1. Addressing 2. Route Leaking 3. Basic Concepts 4. Network Types 5. Configurations and Troubleshooting - OSPF 1. Route Calculation 2. Basic Concepts 3. LSA Types 4. Configurations and Troubleshooting 5. Area Types - Route Control 1. Route-policy 2. IP Prefix List 3. ACL 4. Route Filtering
Bearer WAN Planning and Deployment	15%	- SR (Segment Routing) 1. SRv6 2. SR-MPLS - VPN Services 1. L3VPN 2. EVPN - Traffic Engineering 1. RSVP-TE 2. SR-TE 3. Flex-Algo

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Huawei HCIE-Datacom V1.0 Sample Questions (Q256-Q261):

NEW QUESTION # 256
Regarding the description of the encapsulation format of the labels in MPLS, the correct one is ?

A. 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
B. The total length of an MPLS single tag is 4 bytes (32 bits).
C. 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
D. 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

Answer: A,B

NEW QUESTION # 257
The following statement about VXLAN gateways is incorrect

A. Layer 2 gateway and VPN instance binding.
B. Layer 2 gateway: Used to solve the problem of tenant access to the VXLAN virtual network, it can also be used for subnet communication of the same VXLAN virtual network.
C. Layer 3 gateway: Used for cross-subnet communication of VXLAN virtual networks and access to external networks.
D. VXLAN Layer 3 gateways can be divided into centralized gateways and distributed gateways.

Answer: A

NEW QUESTION # 258
Which of the following types of LSAs does OSPF use to support SR-MPLS?

A. Type 2 Network LSA
B. Type 10 Opaque LSA
C. Type 1 Router LSA
D. Type 7 NSSA External LSA

Answer: B

Explanation:
Comprehensive and Detailed In-Depth Explanation:
To supportSR-MPLS (Segment Routing over MPLS),OSPFusesType 10 Opaque LSAsto advertiseSegment Routing (SR) capabilities and information.
Type 10 Opaque LSA (B): Used fordistributing application-specific informationwithin an OSPF area. In SR- MPLS, it carries theSID/Label mappingsand other SR-related information.
Type 7 NSSA External LSA (A):Used to advertise external routes within an NSSA, not related to SR-MPLS.
Type 1 Router LSA (C):Advertises the router's interfaces and links but does not carry SR-specific information.
Type 2 Network LSA (D):Advertises the links of abroadcast or NBMA network, not used for SR-MPLS.
Therefore, the correct answer isB (Type 10 Opaque LSA), as it enables theadvertisement of SR information.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei SR-MPLS Configuration Guide
RFC 8665: Segment Routing with OSPFv2

NEW QUESTION # 259
On the campus network shown, IPv6 is deployed for service tests. Four routers are deployed on the network, and OSPFv3 is used for IPv6 network connectivity. An engineer checks the LSDB of R2 and obtains a Link- LSA. Which of the following statements about the LSA are correct?

A. The IPv6 address prefix of R2's GE0/0/0 is 2001:DB8:2345:23::/64.
B. This LSA indicates that R2 does not support external routes but can participate in IPv6 route calculation.
C. This LSA is generated by R2.
D. The link-local address of R2's GE0/0/0 is FE80::2E0:FCFF:FECD:4F79.

Answer: A,C,D

Explanation:
InOSPFv3,Link-LSA (Type 8)is generated by a routerfor each of its interfacesto advertise:
Therouter ' s link-local addresson that interface.
TheIPv6 prefixesassociated with the interface.
Flags and options, such as router priority or loopback indicators.
From the output:
Link-LSA (Interface GigabitEthernet0/0/0)
Originating Router: 10.1.2.2
Link-Local Address: FE80::2E0:FCFF:FECD:4F79
Prefix: 2001:DB8:2345:23::/64
A). The link-local address of R2's GE0/0/0 is FE80::2E0:FCFF:FECD:4F79# This matches the Link-Local Address field in the LSA.# B). The IPv6 address prefix of R2's GE0/0/0 is 2001:DB8:2345:23::/64# This matches the Prefix field in the LSA.# C). This LSA indicates that R2 does not support external routes but can participate in IPv6 route calculation##Incorrect.
TheLink-LSAdoesnot provide any indicationabout external route capabilities.
It simply advertisesinterface-specific IPv6 and link-local info.
Whether R2 supports external routes depends onType 5 (External) or Type 7 (NSSA) LSAs, not Link-LSAs.
D). This LSA is generated by R2# The Originating Router: 10.1.2.2 is R2's router ID, so this LSA is definitely generated by R2.# Correct Answers:A, B, D The Link-LSA in OSPFv3 contains:
The link-local address used by the originating router on the link.
A list of all IPv6 prefixes associated with the link.
Flags such as router priority and the Router-LSA options.
These LSAs are alwaysgenerated by the router itselfand arenot flooded beyond the link.
Reference:Huawei HCIE-Datacom V1.0 Study GuideChapter:OSPFv3 Routing ProtocolSection:OSPFv3 LSA Types and Their Roles (Link-LSA)

NEW QUESTION # 260
When an NVE encapsulates a data frame into a VXLAN packet, information of which of the following protocols is encapsulated between the outer IP header and the VXLAN header?

A. UDP
B. Ethernet
C. IP
D. TCP

Answer: A

Explanation:
Comprehensive and Detailed In-Depth Explanation:
In VXLAN encapsulation, the data frame is encapsulated as follows:
Original Ethernet Frame:The data packet to be encapsulated.
VXLAN Header:Contains the VXLAN Network Identifier (VNI) and other information.
UDP Header:VXLAN usesUDP (User Datagram Protocol)to transport the encapsulated data over an IP network.
Outer IP Header:Provides the source and destination IP addresses of the VTEPs.
Therefore, theUDP header(C) isencapsulated between the outer IP header and the VXLAN header.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei VXLAN Configuration Guide
RFC 7348: Virtual eXtensible Local Area Network (VXLAN)

NEW QUESTION # 261
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