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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
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
Bearer WAN Planning and Deployment	15%	- Bearer Network Architecture 1. CloudWAN solution and application scenarios 2. Typical bearer network structure and requirements - High-level Technology Deployment 1. Network slicing and service bearing 2. SRv6 principles and deployment
Network Automation Technologies and Practice	17%	- Automation Foundation 1. Network programming basis and protocols 2. YANG model and data modeling - Huawei Automation Solutions 1. API-based network operation and maintenance 2. Configuration automation and deployment 3. eSight and iMaster NCE tools
Advanced Routing and Switching Technologies	37%	- Advanced Switching Technologies 1. Multicast routing and deployment 2. Ethernet protection and reliability technologies 3. VXLAN and EVPN principles and application - Advanced Routing Protocols 1. IS-IS protocol principles and deployment 2. OSPF advanced features and optimization 3. BGP route control, policy and deployment - Network Quality and Optimization 1. QoS mechanism and deployment 2. Traffic engineering and MPLS technology
Campus Network Planning and Deployment	23%	- Campus Network Service Deployment 1. WLAN planning and deployment 2. User access management and security 3. Campus network management and operation - Campus Network Architecture Design 1. Typical campus network structure and design principles 2. CloudCampus solution architecture and features

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Huawei HCIE-Datacom V1.0 Sample Questions (Q199-Q204):

NEW QUESTION # 199
What are the reasons why the BGP connection is down after it is successfully established ? ( Single choice questions) Single choice

A. After the BGP connection is established, the keepalive message is not received within the negotiated holdtime time.
B. The wrong BGP packet was received.
C. The mandatory attribute in the route update packet is missing.
D. Open message negotiation failed.

Answer: D

NEW QUESTION # 200
Router HW1 exists in the carrier HW's network as an MPLSLSR router. The router receives a packet carrying a label, but the label entry does not exist in its LFIB. So how does the router handle that message?

A. Router HW1 will forward the message with the default label
B. Router HW1 drops the message
C. Router HW1 uses LDP to create an LSP and creates a new path in LFIB for the label carried in the message
D. Router HW1 strips off the label and looks for the FIB using the P destination address

Answer: B

NEW QUESTION # 201
Based on the configuration shown in the figure below, it can be known that R4 has () interfaces advertised into IS-IS?

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

Answer: D

NEW QUESTION # 202
In Huawei SD-WAN Solution, which of the following tunneling technologies is used to establish data channels?

A. GRE over IPsec
B. IPsec
C. MPLS
D. WLAN

Answer: A,B

Explanation:
Understanding Huawei SD-WAN Tunneling Technologies
Huawei SD-WAN uses secure tunneling to connect branches, data centers, and cloud services.
# Tunneling Technologies in SD-WAN:# IPsec (Answer B) # Provides secure encrypted tunnels over public or private networks.# GRE over IPsec (Answer D) # Encapsulates traffic inside GRE, then encrypts with IPsec, enabling support for multicast and non-IP traffic.
# A. WLAN (Incorrect Choice) # WLAN is a wireless technology, not a tunneling protocol.# C. MPLS (Incorrect Choice) # MPLS is a core network transport technology but is not used to establish SD-WAN data channels directly.
Why are Answers B and D Correct?
# Huawei SD-WAN primarily uses IPsec for data encryption.# GRE over IPsec is used when supporting multicast or dynamic routing protocols over tunnels.
# Reference: Huawei HCIE-Datacom Guide - SD-WAN Tunneling Mechanisms

NEW QUESTION # 203
To allow only authorized users (users who obtain IP addresses through authorized DHCP servers or use specified static IP addresses) to access the network shown in the figure, which of the following solutions can be used?

A. DHCP Snooping + IPSG
B. DAI + IPSG
C. DAI + Port Security
D. DHCP Snooping + DAI

Answer: A

Explanation:
Understanding Network Security for Authorized User Access
# Problem Scenario:
Only authorized users should be allowed network access.
Users can obtain IP addresses either via DHCP or a predefined static IP list.
Unauthorized users (e.g., attackers using rogue DHCP servers or spoofed IPs) must be blocked.
# Required Technologies for Securing Access:
1##DHCP Snooping- Protects againstrogue DHCP serversand builds abinding table of legitimate DHCP clients.
2##IP Source Guard (IPSG)- Ensures that onlyauthorized IP-MAC bindingscan send traffic.
Analysis of the Answer Choices:
#A. DAI + Port Security (Incorrect)
DAI (Dynamic ARP Inspection)prevents ARP spoofingbut doesnot validate IP-MAC-DHCP bindings.
Port Securityonlylimits MAC addresses per portbut doesnot verify IP addresses.
Does NOT protect against unauthorized static IP users.
#B. DHCP Snooping + IPSG (Correct)
DHCP Snooping:
Preventsrogue DHCP servers from assigning unauthorized IPs.
Builds aDHCP binding table(IP-MAC-Port).
IP Source Guard (IPSG):
Blocks trafficfrom IPs not listed in the DHCP snooping binding table.
Can be configured to allow manually specified static IP addresses.
Best choice to allow only authorized users (both DHCP and static IP users).
#C. DHCP Snooping + DAI (Incorrect)
DAI (Dynamic ARP Inspection) prevents ARP spoofingbutdoes not block unauthorized static IP users.
Lacks IP-level access controlneeded to enforce static IP policies.
#D. DAI + IPSG (Incorrect)
IPSG (IP Source Guard) needs DHCP Snooping to build the binding table.
Without DHCP Snooping, IPSG cannot function properly.
DAI does not provide complete protection against unauthorized users.
Why is the Answer B (DHCP Snooping + IPSG)?
#Ensures only users assigned a DHCP IP (or authorized static IPs) can send traffic.
#Blocks rogue DHCP servers and unauthorized static IP users.
Real-World Application:
Enterprise Networks:Prevents unauthorizedstatic IP users or attackers from accessing VLANs.
Public Wi-Fi Security:Ensures onlyauthorized users receive IPs and can send traffic.
#Reference:Huawei HCIE-Datacom Guide - DHCP Snooping and IPSG Security Mechanisms

NEW QUESTION # 204
......

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