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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Objectives
Topic 1: Network Automation and Programmability	- SDN and automation 1. NETCONF/YANG basics 2. Network automation tools
Topic 2: Network Security and QoS	- QoS mechanisms 1. Traffic classification and shaping - Security mechanisms 1. Basic network security design 2. ACL and traffic control
Topic 3: Routing and Switching Technologies	- IP routing protocols 1. IS-IS basics 2. BGP 3. OSPF - Switching technologies 1. VLAN and STP 2. Ethernet switching mechanisms
Topic 4: Enterprise Network Architecture	- Network design principles 1. Hierarchical network architecture 2. Scalability and high availability design
Topic 5: WAN and VPN Technologies	- MPLS fundamentals 1. VPN technologies 2. MPLS LDP and forwarding
Topic 6: Data Center and Virtualization Technologies	- VXLAN and overlay networks 1. Data center network virtualization
Topic 7: IPv6 and Advanced IP Technologies	- IPv6 deployment 1. IPv6 addressing and transition

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Huawei HCIE-Datacom V1.0 Sample Questions (Q267-Q272):

NEW QUESTION # 267
What are the common ways to learn routing in BGP? ( Multi-select)

A. BGP routing for other AS is introduced
B. Introduce static routes
C. Introduced Direct Route
D. receives neighbor routing information

Answer: B,C,D

NEW QUESTION # 268
In the LDP session establishment process, the initiator sends an Initialization message for parameter negotiation. Which message will be sent by the responder if it does not accept negotiation parameters?

A. Error Notification Message
B. Keepalive Message
C. Hello Message
D. Initialization Message

Answer: A

Explanation:
Comprehensive and Detailed In-Depth Explanation:
In the Label Distribution Protocol (LDP) session establishment process, theInitialization messageis sent by the initiator to propose parameters for the session. If the responder finds that the proposed parameters are not acceptable, it responds with anError Notification Message. This message indicates that the session could not be established due to incompatible or incorrect parameters.
TheError Notification Messagetypically includes details about why the session could not be established, such as parameter mismatch or unsupported features. If the parameters are acceptable, the responder would instead reply with aKeepalive Messageto maintain the session.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei MPLS Configuration and Maintenance Guide
RFC 5036: LDP Specification

NEW QUESTION # 269
Which of the following statements are correct about the authentication protocols used in Portal authentication?

A. When HTTP or HTTPS is used as the authentication protocol, none of the devices involved in the authentication process need to support the Portal protocol.
B. When Portal is used as the authentication protocol, the Portal server and access device only need to support the Portal protocol, but not the HTTP and HTTPS protocols.
C. When HTTP or HTTPS is used as the authentication protocol, the client needs to send authentication information to the access device, which then sends the information to the authentication server for identity authentication.
D. When Portal is used as the authentication protocol, the Portal server needs to exchange authentication information with the access device, which then sends the information to the authentication server for identity authentication.

Answer: C,D

Explanation:
Comprehensive and Detailed Explanation:
# Portal authentication is a web-based authentication mechanism used in campus networks to control user access.
# Correct Statements:# (A) The Portal server exchanges authentication details with the access device, which forwards them to the authentication server.# (D) When using HTTP/HTTPS authentication, the client must send authentication credentials to the access device, which then forwards them to the authentication server.
# Incorrect Statements:# (B) HTTP/HTTPS support is mandatory for web-based authentication.# (C) If HTTP/HTTPS is used, Portal authentication may still be required.
# Reference: Huawei HCIE Datacom - Portal Authentication Mechanism

NEW QUESTION # 270
What are the following advanced features supported by BGP EVPN?

A. ARP broadcast suppression
B. VRRP overVXLAN
C. Multi-active gateway
D. WI-AN Qos

Answer: A,B,C,D

NEW QUESTION # 271
Which of the following inter-AS MPLS L3VPN solutions need VPN user data packets to carry MPLS labels when being forwarded between ASs?

A. Option A
B. Option D
C. Option B
D. Option C

Answer: B,C

Explanation:
There arethree standard inter-AS MPLS VPN options, as per RFC 4364:
Option A (Back-to-Back VRF):
VRFs are directly connected between ASBRs using routing exchange (like static/BGP).
No label switching between ASs -no MPLS label neededbetween ASs.
Option B (EBGP Label Exchange):
ASBRs exchange labeled VPNv4 routes via EBGP.
One MPLS label is required -MPLS forwarding across AS boundaryis used.
Option C (End-to-End LSP):
Full end-to-end LSP is created across ASs.
MPLS labels are definitely usedend-to-end, even between ASs.
Option D (Commonly vendor-specific extensions based on Option B/C):
Similar to Option C -requires MPLS labels.
So:
B). Option B- needs MPLS label#
D). Option D- also needs MPLS label#
A). Option A-no MPLS label#
C). Option C- also uses MPLS label#, but not listed as an answer option in this question format (should have been).
Assuming valid options areA, B, D, the correct ones needing MPLS labels are:
Correct answers: B, D
Reference:Huawei HCIE-Datacom V1.0 Study Guide -Chapter: MPLS VPNSection: Inter-AS VPN Solutions

NEW QUESTION # 272
......

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