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H12-821_V1.0 Pack
Vendor: Huawei
Exam Code: H12-821_V1.0
Exam Name: HCIP-Datacom-Core Technology V1.0
Exam Questions: 219
Last Updated: November 21, 2025
Related Certifications: Huawei Certified ICT Professional, HCIP Datacom
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Free Huawei H12-821_V1.0 Exam Actual Questions

Question No. 1

Which of the following statements regarding the MED value in BGP are true?

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Correct Answer: A, D

The MED (Multi-Exit Discriminator) is an optional, non-transitive attribute used to influence the exit path. MED is considered after attributes such as Local-Preference, AS-Path, and Origin during route selection. By default, if a MED value is missing, it is treated as 0 unless the bestroute med-none-as-maximum command is configured to treat it as 4294967295 .


Question No. 2

During the DHCP interaction process, the DHCP server and client exchange various types of packets. Which of the following packets is not sent from the client to the server?

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Correct Answer: B

The DHCPNAK message is sent by the DHCP server to the client to indicate that the requested configuration is not valid. Messages like DHCPDiscover, DHCPRequest, and DHCPRelease are initiated by the client in the DHCP process .


Question No. 3

Which of the following statements regarding an IP prefix are true?

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Correct Answer: C

An IP prefix filter is designed to match both the IP address and its prefix length, making it suitable for filtering routing information rather than data packets. Options A and D are incorrect because IP prefix filters do not work directly on data packets, and they can match both prefix numbers and lengths .


Question No. 4

OSPF has multiple types of routes with varying priorities. Which of the following types of routes has the lowest priority when they have the same prefix?

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Correct Answer: C

Comprehensive and Detailed Step-by-Step

OSPF Route Preference Hierarchy:

OSPF uses the following preference order for route types when the prefix is the same:

Intra-area routes (D): Routes within the same OSPF area have the highest priority.

Inter-area routes (B): Routes between different OSPF areas are preferred after intra-area routes.

Type 1 external routes (A): External routes redistributed into OSPF, considering the internal OSPF cost to the ASBR.

Type 2 external routes (C): External routes redistributed into OSPF, ignoring the internal OSPF cost to the ASBR.

Lowest Priority:

Type 2 external routes (C) are given the lowest priority because they represent external information that does not consider internal OSPF costs.


HCIA-Datacom Study Guide, Chapter: OSPF Route Preference

Huawei OSPF Routing Table Selection Rules

Question No. 5

IGMP has three versions. Different versions support different features. Which of the following features is supported by all versions?

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Correct Answer: C

Comprehensive and Detailed Step-by-Step

Overview of IGMP Versions:

IGMPv1: The simplest version, supports basic group membership management using Report messages but lacks Leave messages.

IGMPv2: Adds features like Leave messages and Group-Specific Queries.

IGMPv3: Supports specifying multicast sources for Source-Specific Multicast (SSM).

Feature Supported by All Versions:

Report messages are fundamental to IGMP functionality and are supported in all three versions.

Features Not Supported by All Versions:

Group-Specific Queries (A): Supported in IGMPv2 and IGMPv3.

Leave Messages (B): Introduced in IGMPv2.

Specifying Multicast Sources (D): Introduced in IGMPv3.


HCIA-Datacom Study Guide, Chapter: IGMP Overview

Huawei Multicast Protocol Details

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