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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Objectives
IPv6 and Advanced IP Technologies	- IPv6 deployment 1. IPv6 addressing and transition
Network Security and QoS	- QoS mechanisms 1. Traffic classification and shaping - Security mechanisms 1. Basic network security design 2. ACL and traffic control
WAN and VPN Technologies	- MPLS fundamentals 1. VPN technologies 2. MPLS LDP and forwarding
Enterprise Network Architecture	- Network design principles 1. Hierarchical network architecture 2. Scalability and high availability design
Network Automation and Programmability	- SDN and automation 1. NETCONF/YANG basics 2. Network automation tools
Data Center and Virtualization Technologies	- VXLAN and overlay networks 1. Data center network virtualization
Routing and Switching Technologies	- Switching technologies 1. Ethernet switching mechanisms 2. VLAN and STP - IP routing protocols 1. OSPF 2. BGP 3. IS-IS basics

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Huawei HCIE-Datacom V1.0 Sample Questions (Q32-Q37):

NEW QUESTION # 32
When MPLS/BGP IP VPN is deployed, which of the following statements is incorrect about BGP route exchange between PEs and CEs?

A. In a CE multi-homing scenario, the BGP AS number replacement function may cause routing loops.
BGP SoO can be used to prevent routing loops at a VPN site.
B. In a Hub & Spoke scenario, when Hub-CE and Hub-PE run an IGP for communication, EBGP cannot be configured on Spoke-PE or Spoke-CE.
C. In a scenario where PEs and CEs use BGP to exchange routing information, if two VPN sites have the same private AS number, the AS number replacement function can be used to replace the AS number in a received private network route with any specified AS number. This prevents routes from being discarded because of repeated AS numbers.
D. When PEs and CEs use BGP to exchange routing information, you do not need to import private network routes to BGP on PEs.

Answer: B

Explanation:
Option B is incorrect because it falsely states that EBGP cannot be configured on Spoke-PE or Spoke-CE if the Hub-CE and Hub-PE run IGP. In reality, EBGP can still be used between Spoke sites and PE devices, regardless of the protocol between the Hub PE and CE. EBGP is often used for PE-CE communication, including in Hub-and-Spoke architectures.
Exact Extract - Huawei HCIE-Datacom VPN Section:
"In Hub & Spoke deployments, EBGP can be deployed between Spoke-CE and Spoke-PE. The choice of routing protocol between Hub-CE and Hub-PE does not limit this." Reference:
Huawei HCIE-Datacom Guide - MPLS L3 VPN Deployment
Huawei Datacom Study Guide - PE-CE Protocol Selection in VPNs

NEW QUESTION # 33
All interfaces of the router have OSPF enabled, the Cost value of the link is identified in the figure, and the Loopback0 socket for R2 is advertised in area 1 , then Rl reaches 10022/32 with a Cost value of ?

A. 0
B. 1
C. 2
D. 3

Answer: B

NEW QUESTION # 34
How do.8021w and 8021D handle BPDUs?( Single choice questions).

A. 8021w Bridge does not forward BPDU packets
B. The 8021w bridge only forwards BPDU packets received from the root bridge
C. The 8021D bridge only forwards BPDU packets received from the root bridge
D. 8021D bridges do not forward BPDU packets

Answer: C

NEW QUESTION # 35
Which of the following statements about BGP EVPN principles are correct in a scenario where a VXLAN tunnel is dynamically established through BGP EVPN?

A. Several BGP EVPN routes are defined through BGP extension.
B. MP_REACH_NLRI is used to carry routing information.
C. MP_REACH_NLRI is used to carry the RT.
D. MP_REACH_NLRI is used to carry the RD.

Answer: A,B,C

Explanation:
BGP EVPN in VXLAN Tunneling
#A. MP_REACH_NLRI is used to carry routing information.
MP_REACH_NLRI (Multiprotocol Reachable Network Layer Reachability Information)is used inBGP updatesto carryVXLAN reachability information.
#B. Several BGP EVPN routes are defined through BGP extension.
BGP EVPN introduces multiple route types, such asType 2 (MAC/IP Advertisement), Type 3 (Inclusive Multicast), and Type 5 (IP Prefix Advertisement).
#D. MP_REACH_NLRI is used to carry the RT.
RT (Route Target) defines route import/export policies in VPN environments.
MP_REACH_NLRI carries the RT attributein BGP EVPN updates.
#Incorrect answer:
#C. MP_REACH_NLRI is used to carry the RD.
Wrong!TheRoute Distinguisher (RD)is carriedinside BGP attributes, but not in MP_REACH_NLRI.
Reference from Huawei HCIE-Datacom Documentation:
Huawei VXLAN BGP EVPN Configuration Guide - BGP EVPN Route Types
HCIE-Datacom Training Material - VXLAN Dynamic Tunnel Establishment

NEW QUESTION # 36
The RR (Route Reflector) is critical to the Huawei SD-WAN Solution, and its deployment mode varies based on the scenario. In which of the following modes can an RR be deployed?

A. Independent deployment of the RR
B. Multi-area deployment of the RR
C. Partially independent deployment of the RR
D. Co-deployment of the RR and hub site

Answer: A,C,D

Explanation:
Understanding Route Reflectors (RRs) in Huawei SD-WAN
In Huawei's SD-WAN Solution, BGP Route Reflectors (RRs) are used to reduce the number of BGP peer relationships and optimize routing scalability.
# Key Functions of an RR in SD-WAN:
* Centralizes BGP route distribution in large-scale SD-WAN networks.
* Reduces full-mesh BGP peering complexity.
* Improves network scalability and convergence time.
Analysis of Each Deployment Mode:
# B. Independent deployment of the RR
* Correct: The RR is deployed as a standalone device, independent of the SD-WAN hub site.
* Best for large-scale SD-WAN deployments requiring dedicated route control.
# C. Co-deployment of the RR and hub site
* Correct: The RR is co-located with the SD-WAN hub site, reducing infrastructure overhead.
* Best for mid-sized SD-WAN deployments where the hub and RR functions can be combined.
# D. Partially independent deployment of the RR
* Correct: The RR is partially separated from the hub but still shares some resources.
* Provides a balance between full independence and co-location.
# A. Multi-area deployment of the RR (Incorrect Choice)
* Multi-area RR deployment is not a common Huawei SD-WAN practice.
* Huawei does not require separate RRs per area, as SD-WAN is based on centralized policy-based routing.
Real-World Application:
* Large Enterprise SD-WAN: Uses independent RRs to optimize global network routing.
* Service Provider SD-WAN: Uses co-deployed RRs to reduce infrastructure costs while maintaining route scalability.
# Reference: Huawei HCIE-Datacom Guide - BGP Route Reflectors in SD-WAN Architecture

NEW QUESTION # 37
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