H12-821_V1.0 TRAINING MATERIALS - H12-821_V1.0 EXAM DUMPS: HCIP-DATACOM-CORE TECHNOLOGY V1.0 - H12-821_V1.0 STUDY GUIDE

H12-821_V1.0 Training Materials - H12-821_V1.0 Exam Dumps: HCIP-Datacom-Core Technology V1.0 - H12-821_V1.0 Study Guide

H12-821_V1.0 Training Materials - H12-821_V1.0 Exam Dumps: HCIP-Datacom-Core Technology V1.0 - H12-821_V1.0 Study Guide

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Huawei H12-821_V1.0 (HCIP-Datacom-Core Technology V1.0) exam is a certification exam offered by Huawei to test the knowledge and skills of IT professionals in the field of data communication core technology. H12-821_V1.0 Exam is designed for individuals who have experience in the planning, design, implementation, and maintenance of data communication networks.

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q111-Q116):

NEW QUESTION # 111
On a broadcast IS-IS network, a DIS needs to be elected to create and update pseudonodes. Which of the following values is the default DIS priority of an IS-IS interface?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Answer: C

Explanation:
Comprehensive and Detailed in-depth Step-by-Step Explanation:
In an Intermediate System to Intermediate System (IS-IS) network, aDesignated Intermediate System (DIS)is elected on broadcast networks to perform the following functions:
Represent the broadcast network as a pseudonode.
Generate and update the Link State Protocol Data Units (LSPs) for the pseudonode.
The DIS is elected based on theDIS priorityvalue, which is configured on IS-IS interfaces. If two routers have the same priority, the router with the higher MAC address becomes the DIS.
Thedefault DIS priorityfor IS-IS interfaces is64, which can be modified depending on the network requirements.
Option A (200):Incorrect. This is not the default value.
Option B (64):Correct. This is the default DIS priority value.
Option C (1):Incorrect. This is not the default value.
Option D (100):Incorrect. This is not the default value.
References:
Huawei HCIA-Datacom Study Guide, Chapter on "IS-IS Basics".
RFC 1195 - Use of OSI IS-IS for Routing in TCP/IP and Dual Environments.


NEW QUESTION # 112
On an OSPF network, if two routers with the same router ID run in different areas and one of the routers is an ASBR, LSA flapping occurs.

  • A. FALSE
  • B. TRUE

Answer: B

Explanation:
Understanding Router ID and Its Role in OSPF:
In OSPF, the Router ID uniquely identifies a router within the OSPF domain. If two routers are configured with the same Router ID, it can lead to issues such as LSA conflicts and flapping. This is because the Router ID is used as a key in OSPF operations, including LSA generation and database synchronization.
HCIP-Datacom-Core Technology Training Material (OSPF Basics - Router ID and LSA Handling).
Scenario Details:
Different Areas: Even if the two routers belong to different areas, the Router ID remains globally significant in the OSPF domain. This means that any duplication of Router IDs will confuse OSPF mechanisms.
ASBR (Autonomous System Boundary Router): When one of the routers is an ASBR, it generates Type 4 and Type 5 LSAs to describe external routes. These LSAs use the Router ID asan identifier. If another router in the network has the same Router ID, conflicts occur during LSDB synchronization.
Reference:HCIP-Datacom Advanced Routing & Switching Technology (LSA Types and ASBR Operations).
Impact of Router ID Duplication:
LSA Flapping: The OSPF process receives conflicting LSAs from routers with the same Router ID. This results in continuous updates and withdrawals of these LSAs, causing flapping.
Routing Instability: LSA flapping leads to frequent recalculations of the OSPF shortest path tree (SPT), affecting overall network stability.
Reference:HCIE-Datacom V1.0 Training Material (OSPF Troubleshooting and Best Practices).
Conclusion:
The statement isTRUE. LSA flapping occurs when two routers in an OSPF network have the same Router ID, even if they are in different areas and one is an ASBR. This is due to the global significance of Router IDs in OSPF and the role they play in LSA generation and propagation.


NEW QUESTION # 113
When receiving a packet that does not match any session table entry, the firewall discards the packet to prevent external attacks and ensure internal information security.

  • A. FALSE
  • B. TRUE

Answer: B

Explanation:
When a Huawei firewall receives a packet that does not match any existing session table entry, it discards the packet. This is part of the default firewall policy, which ensures that unrecognized traffic is treated as a potential security risk and blocked. This behavior is vital for preventing unauthorized access and mitigating external attacks. The feature aligns with Huawei's default security strategies as detailed in their firewall operation manuals .


NEW QUESTION # 114
On an enterprise network, the directly connected interfaces of two OSPF routers are on different network segments and have different masks. To establish an OSPF neighbor relationship between the two interfaces, you can change their network types to which of the following?

  • A. Point-to-point
  • B. NBMA
  • C. Broadcast
  • D. P2MP

Answer: A

Explanation:
Comprehensive and Detailed in-depth Step-by-Step Explanation:To establish an OSPF neighbor relationship, the following conditions must be met:
* The routers must share a common network segment.
* Their Hello and Dead intervals must match.
* Their OSPF network types must be compatible.
* The IP subnet masks must match.
If two OSPF routers are on different network segments and have different subnet masks, one solution is to change the OSPF network type to Point-to-Point (P2P) on both interfaces.
* Point-to-Point (P2P):
* In a P2P network type, OSPF ignores the subnet mask mismatch and establishes the neighbor relationship regardless of the network mask.
* This is ideal for directly connected links between two routers.
* NBMA (Non-Broadcast Multi-Access):
* This network type is used for networks like Frame Relay or ATM, where a single physical interface connects to multiple neighbors.
* It is not applicable to solving subnet mask mismatches for a single link.
* P2MP (Point-to-Multipoint):
* This type treats the link as multiple P2P links. It is mainly used in hub-and-spoke topologies.
* While it can be configured to solve subnet mask mismatches, it is more complex and less commonly used compared to the P2P type.
* Broadcast:
* This type requires all routers on the same segment to agree on subnet masks, so it cannot resolve the subnet mask mismatch issue.
Therefore, the correct answer is A. Point-to-point.
References:
* Huawei HCIA-Datacom Study Guide, Chapter on "OSPF Neighbor Relationships".
* RFC 2328 - OSPF Version 2, Section 10.


NEW QUESTION # 115
When configuring an ACL on a router, you can specify a unique number or name to identify the ACL. Once a named ACL is created, it cannot be modified. You can only delete the named ACL and reconfigure it.

  • A. FALSE
  • B. TRUE

Answer: A

Explanation:
ACL Modification
* Named ACLs can be modified after their creation. Unlike numbered ACLs, named ACLs provide greater flexibility for editing individual rules without deleting the entire ACL.
* Therefore, the statement is incorrect.
HCIP-Datacom-Core Reference
* The flexibility and editability of named ACLs are discussed in the ACL configuration sections.


NEW QUESTION # 116
......

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