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H12-891_V1.0 Reliable Test Sample, H12-891_V1.0 Valid Test Book

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Huawei H12-891_V1.0 HCIE-Datacom V1.0 certification program is a highly specialized certification program that focuses on providing advanced-level knowledge and expertise in data communication technologies. HCIE-Datacom V1.0 certification program is designed for professionals who are responsible for designing, implementing, and managing complex data communication networks. HCIE-Datacom V1.0 certification program is recognized by many organizations and companies as a benchmark for excellence in data communication technologies.

Huawei H12-891_V1.0 (HCIE-Datacom V1.0) Certification Exam is a professional-level certification exam offered by Huawei Technologies Co. Ltd. H12-891_V1.0 exam is designed to test the skills and knowledge of professionals in the field of data communication. H12-891_V1.0 exam covers a wide range of topics, including network design, implementation, maintenance, and troubleshooting. It is intended for professionals who have several years of experience in the data communication field and are looking to advance their careers.

Huawei HCIE-Datacom V1.0 Sample Questions (Q217-Q222):

NEW QUESTION # 217
Is the following description of ospf virtual links correct?

A. The virtual connection ip is used as the link address
B. Virtual links can be used to solve the problem of zone 0 being segmented
C. A virtual connection can be established in any area, after which it itself belongs to the region
D. The cost of a virtual connection is zero and is the optimal link

Answer: B

NEW QUESTION # 218
Which of the following statements is incorrect about intranet security design for a large or medium-sized virtualized campus network?

A. Intranet security refers to both wired and wireless network security.
B. In addition to terminal access security, interface security must be considered during wireless network security design.
C. To secure data transmission, the CAPWAP tunnel between the AC and AP supports DTLS encryption.
D. Traffic suppression can be configured on the wired network to block broadcast traffic by shutting down interfaces.

Answer: D

Explanation:
Option A: Correct - both terminal and interface security are important.
Option C: Correct -CAPWAP supports DTLSencryption for secure tunnel communication.
Option D: Correct - intranet security design considersboth wired and wireless.
Option B:Incorrect- traffic suppression (such as broadcast suppression) is implemented usingrate limiting or storm control,not by shutting down interfaces. Shutting down interfaces would disrupt legitimate traffic too.
Correct answer: B

NEW QUESTION # 219
In order to study the working mechanism of the OSPFv3 protocol, a project to build a network topology is as follows, the configuration of R1 and R2 is as follows, please ask the LSA switched between R1 and R2 What are the types?

A. Link-LSA
B. Inter-area-prefix-LSA
C. Router-LSA
D. network-LSA

Answer: A,C,D

NEW QUESTION # 220
In typical "two-city three-center" networking, into which layers is the bearer WAN divided?

A. Core layer
B. Access layer
C. Control layer
D. Aggregation layer

Answer: A,B,D

Explanation:
Understanding "Two-City Three-Center" Networking
# What is "Two-City Three-Center" Networking?
* A high-availability disaster recovery (DR) solution used by financial institutions, government, and enterprise networks.
* "Two cities" # Indicates that data centers are deployed in two different locations for redundancy.
* "Three centers" # Includes two active data centers + one remote disaster recovery center.
Bearer WAN Layers in "Two-City Three-Center" Networks
# A. Core Layer
* Provides high-speed backbone connectivity between different data centers.
* Uses high-capacity routers and optical links for long-distance communication.
# B. Aggregation Layer
* Connects access sites to the core network.
* Aggregates traffic from branch offices, remote sites, and smaller data centers.
# D. Access Layer
* Connects end-users, remote branches, and applications to the WAN.
* Uses CE (Customer Edge) routers and firewalls to ensure secure access.
# C. Control Layer (Incorrect Choice)
* The control plane exists in networking, but it is not a physical bearer WAN layer.
* The control layer is a logical function, not a network topology layer.
Real-World Application:
* Banking Networks: Ensures that core banking applications remain available even in case of a disaster.
* Government Data Centers: Enables cross-city data replication for public services.
# Reference: Huawei HCIE-Datacom Guide - "Two-City Three-Center" Network Design

NEW QUESTION # 221
BGP EVPN can be used as the VXLAN control plane protocol to completely prevent traffic flooding, such as broadcast ARP packets, on the VXLAN network.

A. FALSE
B. TRUE

Answer: B

Explanation:
Understanding VXLAN and BGP EVPN Control Plane
VXLAN (Virtual eXtensible LAN) is an overlay network technology that enables Layer 2 (L2) extension over an IP-based network using MAC-in-UDP encapsulation.
# Traditional VXLAN Flooding Issue:
* Without BGP EVPN, VXLAN uses flood-and-learn behavior for MAC address learning.
* Broadcast, Unknown Unicast, and Multicast (BUM) traffic is flooded to all VTEPs, which is inefficient.
# How Does BGP EVPN Solve Flooding?
* BGP EVPN (Ethernet VPN) replaces the flood-and-learn model with a distributed control plane.
* MAC/IP bindings are advertised through BGP EVPN Type 2 routes, eliminating the need for flooding ARP requests.
* VXLAN routers learn MAC addresses proactively instead of relying on flooding.
Why is the Answer TRUE?
# BGP EVPN fully prevents ARP flooding by distributing MAC/IP bindings via control plane updates.# VTEPs only send traffic to known destinations, reducing network congestion.# BGP EVPN is the industry standard for large-scale data center and campus VXLAN deployments.
Real-World Application:
* Data Centers: Avoids unnecessary ARP request flooding in large cloud networks.
* Campus Networks: Reduces L2 broadcast storms, improving network efficiency.
* Service Provider Networks: Enables scalable multi-tenant VXLAN solutions.
# Reference: Huawei HCIE-Datacom Guide - VXLAN BGP EVPN Control Plane Architecture

NEW QUESTION # 222
......

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