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  1. Home
  2. Huawei Certification
  3. H12-821_V1.0 Exam
  4. Huawei.H12-821_V1.0.v2026-02-20.q316 Dumps
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Question 86

Route summarization is a mechanism that combines multiple routes. BGP supports automatic summarization and manual summarization on IPv6 networks.

Correct Answer: B
Comprehensive and Detailed In-Depth Explanation:
* BGP does not support automatic summarization for IPv6 networks.
* In IPv4, BGP could perform automatic summarization at classful boundaries, but this feature is not supported for IPv6.
* Manual summarization can be configured using aggregate IPv6 addresses (e.g., using the aggregate- address command).
* Since the statement incorrectly claims that BGP supports automatic summarization for IPv6, it is false.
# Reference: Huawei HCIA-Datacom Study Guide, BGP Route Summarization for IPv4 and IPv6.
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Question 87

Two routers running IS-IS can establish an adjacency relationship only if the time interval between IlH sending is the same.

Correct Answer: B
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Question 88

In an OSPF routing domain, two routers must be specified as one DR and one BDR in a broadcast or NBMA network with at least two routers.

Correct Answer: A
In an OSPF broadcast or NBMA network with at least two routers, one router must act as the DR (Designated Router), and another as the BDR (Backup Designated Router) to ensure efficient communication and reduce the number of adjacencies. This is a requirement for OSPF operation in such network types .
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Question 89

In the network shown in the figure, the R1 device is configured with route penetration. Then the R1 device sends the LSP of Level 1-2 to R3 so that R3 can learn the entire network route.

Correct Answer: B
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Question 90

The four routers run IS-S and have established an adjacency relationship. The area numbers and router levels are marked in the figure.

What is the cost of R4 reaching 10.0.2.2/32?

Correct Answer: B
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