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Huawei H12-891_V1.0 Exam Syllabus Topics:

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

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Huawei HCIE-Datacom V1.0 Sample Questions (Q266-Q271):

NEW QUESTION # 266
Which of the following types of EVPN routes does not carry MPLS labels?

A. Ethernet segment route
B. Inclusive multicast route
C. MAC/IP advertisement route
D. Ethernet A-D route

Answer: A

Explanation:
Comprehensive and Detailed Explanation:
Ethernet VPN (EVPN) is an advanced L2VPN technology that enhances MAC learning and forwarding in data center and enterprise networks. Different EVPN route types are used for various functions:
* Ethernet A-D (Auto-Discovery) Route: Used for auto-discovery of PE devices and does carry labels
.
* MAC/IP Advertisement Route: Distributes MAC-to-IP mappings and carries labels for forwarding decisions.
* Ethernet Segment Route: Does not carry MPLS labels as it is used to signal multi-homing and redundancy information.
* Inclusive Multicast Route: Used for multicast forwarding and carries labels for tunnel identification.
Since Ethernet Segment Route is used only for multi-homing signaling and does not carry MPLS labels, the correct answer is C.
# Reference: Huawei HCIE Datacom Study Guide - EVPN Route Types

NEW QUESTION # 267
The following description of Filter-Policy is correct?( Radio).

A. With Filter-Policy, on ASBR in OSPF, type5LSA and type7LSA can be applied The build is filtered.
B. When filtering routes using the pre-slow list, the table entry ip-prefxldeny0000 0 lese-qual 32 indicates that only the default route matches
C. Filter-policy filters the link state information received or published, and can modify the properties of route entries.
D. Prefix lists can be used to filter both routes and packets.

Answer: C

NEW QUESTION # 268
Which of the following statements aboutSR-MPLS Policy candidate pathsare correct?

A. A candidate path can contain multiple segment lists, with each segment list carrying the weight attribute.
B. The valid candidate path with the highest preference functions as the primary path of the SR-MPLS Policy.
C. An SR-MPLS policy can contain multiple candidate paths with the preference attribute.
D. Load balancing can be implemented among candidate paths and among segment lists.

Answer: A,B,C,D

Explanation:
Comprehensive and Detailed Explanation:
#SR-MPLS Policy candidate pathsare used forflexible path selectionandload balancinginSegment Routing (SR-MPLS)networks.
#Correct Statements:
#(A)Each candidate path can havemultiple segment lists, each with itsown weightfor load balancing.
#(B)Load balancingis supported bothbetween candidate pathsandwithin segment lists.
#(C)AnSR-MPLS Policy can contain multiple candidate paths, each with apreference value.
#(D)Thecandidate path with the highest preference is selected as the primary path.
#Reference:Huawei HCIE Datacom - SR-MPLS Policy Path Selection

NEW QUESTION # 269
As shown in the figure, a company sets up an OSPF network. The links in the figure all form OSPF adjacencies, and all OSFP devices declare their own loopback addresses. One day SIR2 The two links of the S2AR1 suddenly failed, and in order to detect if the network was operating properly, the engineers performed a device status check, which is correct as described below

A. R5 can normally learn the loopback route to R2
B. R3 can not learn the loopback route to R2
C. R3 of R2 The loopback route of R2 can be learned normally
D. R1 can normally learn the loopback route

Answer: A,B

NEW QUESTION # 270
In addition to indicating priority, the DSCP value can also indicate the drop probability. Which of the following DSCP values is set with the highest drop probability?

A. AF10
B. AF11
C. AF43
D. AF12

Answer: C

Explanation:
Understanding DSCP & Assured Forwarding (AF) Classes
* DSCP (Differentiated Services Code Point) is used for QoS (Quality of Service) classification in IP packet headers.
* Assured Forwarding (AF) classes provide four traffic classes (AF1x, AF2x, AF3x, AF4x).
* Each AF class has three drop precedence levels (Low = 1, Medium = 2, High = 3).
A screenshot of a computer AI-generated content may be incorrect.

Analysis of Options:
* AF43 (Answer A) # Class 4, High Drop (Highest priority, highest drop probability) #
* AF10 (Answer B) # Class 1, Low Drop (Lowest priority, lowest drop probability) #
* AF12 (Answer C) # Class 1, Medium Drop Probability #
* AF11 (Answer D) # Class 1, Low Drop Probability #
Why AF43?
* Highest priority traffic within AF Class 4.
* Highest drop probability (x3) means packets are dropped first under congestion.
* Used for premium but non-essential services (e.g., bulk data transfer, backups).
# Reference: Huawei HCIE-Datacom Guide - QoS & DSCP Marking

NEW QUESTION # 271
......

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