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Huawei Certification
H12-821_V1.0 Exam
Huawei.H12-821_V1.0.v2026-01-23.q644 Dumps

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Question 116

Which of the following characteristics meet the following conditions. A BCP router may not support these attributes, but it will still receive such attributes and pass them on to other peers. (Multiple choice)

A.Local_Pref
B.Ageregator
C.Multi_Exit_Disc
D.Commmnity

Correct Answer: B,D

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Question 117

When deploying a VRRP network, an enterprise administrator sets the virtual IP address to 192.168.1.254 and VRID to 1. Which of the following is the virtual MAC address after the network becomes stable?

A.0000-5e01-0101
B.0000-5e01-0254
C.0000-5e00-0101
D.0000-5e00-0254

Correct Answer: C

Comprehensive and Detailed Step-by-Step Explanation:
VRRP Virtual MAC Address Format:
The VRRP virtual MAC address is generated using the format:0000-5e00-01XX, whereXXrepresents the VRID in hexadecimal.
Calculation:
VRID = 1 # Hexadecimal =01.
Virtual MAC =0000-5e00-0101.
Correct Option:
C (0000-5e00-0101).
References:
HCIA-Datacom Study Guide, Chapter: VRRP MAC Address Format
Huawei VRRP Configuration Guidelines
Let me continue with the next set of questions!

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Question 118

Which of the following statements regarding different LSA types is false?

A.LS Request packets contain only LS Type, LS ID, and Advertising Router.
B.LS Ack packets contain complete LSA information.
C.DD packets contain only LSA summary information, including LS Type, LS ID, Advertising Router, and LS Sequence Number.
D.LS Update packets contain complete LSA information.

Correct Answer: B

LS Ack (Link State Acknowledgment) packets are used to acknowledge received LSAs and do not contain complete LSA information. Instead, they contain only the headers of LSAs being acknowledged. This contrasts with LS Update packets, which carry full LSA details. The misunderstanding of LS Ack functionality makes this statement false .

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Question 119

An engineer sets the CAPWAP heartbeat detection interval to 20 of the active link before an active/standby switchover occurs?

A.60s
B.20s
C.90s
D.75s

Correct Answer: B

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Question 120

On an IS-IS network, routers send LSPs to exchange link state information. LSPs are classified into Level-1 LSPs and Level-2 LSPs and have the same format. Which of the following parts constitute the LSP ID in an LSP?

A.LSP Number
B.Pseudonode ID
C.System ID
D.IS Type

Correct Answer: A,B,C

IS-IS Overview: Intermediate System to Intermediate System (IS-IS) is a link-state routing protocol. Routers exchangeLink State Packets (LSPs)to maintain a synchronized link-state database. These LSPs are categorized intoLevel-1 LSPs(intra-area routing) andLevel-2 LSPs(inter-area routing). Both types share the same packet format.
HCIP-Datacom-Core Technology Training Material (IS-IS LSPs and Packet Structure).
LSP ID Format: The LSP ID uniquely identifies each LSP and ensures accurate routing information. It comprises the following components:
System ID (C): A 6-byte identifier assigned to each router, derived from the router's NET (Network Entity Title). This identifier ensures unique identification of routers within the IS-IS domain.
Pseudonode ID (B): Assigned when a router acts as a Designated Intermediate System (DIS) on a broadcast network. It differentiates LSPs generated by the DIS from other routers.
LSP Number (A): A 1-byte field indicating the sequence number of the LSP. It helps distinguish multiple LSPs generated by the same router for the same level.
Reference:HCIP-Datacom Advanced Routing & Switching Technology (IS-IS LSP Format).
IS Type Exclusion:
IS Type (D)is not part of the LSP ID itself. It is a field within the IS-IS PDU that indicates the type of Intermediate System (Level-1, Level-2, or both) but does not contribute to the composition of the LSP ID.
Reference:HCIE-Datacom V1.0 Training Material (IS-IS Basics and Levels).
Conclusion: The LSP ID in IS-IS consists ofSystem ID,Pseudonode ID, andLSP Number. These components uniquely identify each LSP within the IS-IS domain.

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