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Huawei H12-821_V1.0 Exam Dumps

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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: February 22, 2026
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 about BFD operating modes are true?

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Correct Answer: A, C, D

In asynchronous mode, BFD control packets are exchanged periodically to detect faults.

In demand mode, once the session is established, BFD stops sending periodic control packets and relies on external mechanisms to verify connectivity.

Asynchronous mode is the most commonly used mode. However, the Echo function is supported in asynchronous mode, making Option B incorrect .


Question No. 2

Which of the following statements regarding multicast MAC addresses are false?

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Correct Answer: B

One multicast MAC address maps to 32 multicast IP addresses due to the limited number of bits used in the mapping process. Specifically, the lower 23 bits of the MAC address map to the lower 23 bits of the multicast IP address, while the high 24 bits of the MAC address are fixed as 0x01005E. Thus, Option B is false .


Question No. 3

Which of the following statements about WLAN roaming are true?

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Correct Answer: A

Question No. 4

OSPF has five types of packets, which have the same header format. If the Auth Type field in the packet header is 1, which of the following authentication modes is used?

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Correct Answer: C

OSPF Authentication Overview

The Auth Type field in the OSPF packet header determines the authentication mode. If the Auth Type is 1, plaintext authentication is used.

Plaintext authentication involves transmitting the password in an easily readable format, which is less secure compared to MD5.

HCIP-Datacom-Core Reference

Authentication mechanisms, including plaintext authentication, are detailed in the OSPF security configuration chapter, confirming that Auth Type = 1 corresponds to plaintext.


Question No. 5

Fill in the blanks

There are two BFD operating modes. In_______mode, the local end sends BFD Control packets at specified intervals, and the remote end checks whether the local end periodically sends BFD Control packets. (Use lowercase letters.)

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Correct Answer: A

In asynchronous mode, the local device sends BFD control packets at predefined intervals, and the remote device monitors the receipt of these packets to detect connectivity issues. This is one of the two operating modes in BFD, the other being demand mode .


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