Huawei H12-821_V1.0 : HCIP-Datacom-Core Technology V1.0
- Exam Code: H12-821_V1.0
- Exam Name: HCIP-Datacom-Core Technology V1.0
- Updated: Sep 14, 2026
- Q & A: 378 Questions and Answers
About Huawei H12-821_V1.0 Exam Questions
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Huawei H12-821_V1.0 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Switching Technologies | 7% | - VLAN and STP fundamentals |
| Topic 2: Network Security | 9% | - ACL and basic security mechanisms |
| Topic 3: IPv6 | 3% | - IPv6 addressing and routing |
| Topic 4: Routing Fundamentals | 3% | - Network basics and routing principles |
| Topic 5: Large-scale WLAN Architecture | 6% | - Enterprise WLAN deployment basics |
| Topic 6: Network Solution | 2% | - Integrated network design scenarios |
| Topic 7: BGP | 17% | - BGP path selection - BGP policy and attributes |
| Topic 8: IS-IS | 8% | - IS-IS protocol fundamentals |
| Topic 9: Multicast | 9% | - IGMP and PIM concepts |
| Topic 10: OSPF | 16% | - OSPF core concepts - OSPF areas and LSDB |
| Topic 11: Network Reliability | 8% | - Redundancy and failover mechanisms |
| Topic 12: Routing and Traffic Control | 10% | - Policy-based routing - Traffic engineering basics |
| Topic 13: Network Service and Management | 2% | - Network management basics |
Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions:
Which of the following parameters are not mandatory during the configuration of a BGP peer?
- A. Peer IP address
- B. as-number
- C. password
- D. description
Correct Answer: C,D 🗳️
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In IPv6, interface IDs can be manually configured, automatically generated by the system, or generated based on the IEEE EUI-64 standard.
- A. TRUE
- B. FALSE
Correct Answer: A 🗳️
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Which of the following statements regarding different LSA types is false?
- A. DD packets contain only LSA summary information, including LS Type, LS ID, Advertising Router, and LS Sequence Number.
- B. LS Request packets contain only LS Type, LS ID, and Advertising Router.
- C. LS Ack packets contain complete LSA information.
- D. LS Update packets contain complete LSA information.
Correct Answer: C 🗳️
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In IGMPv1, querier selection depends on a multicast routing protocol, such as PIM. In IGMPv2 and IGMPv3, the interface with the largest IP address acts as the querier.
- A. TRUE
- B. FALSE
Correct Answer: A 🗳️
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On an STP network, the root bridge, root port, and designated port are elected in sequence. The election rules of these ports are different. List the steps for electing the root port in sequence.
Correct Answer:
Explanation:
The sequence of steps for electing the root port in an STP (Spanning Tree Protocol) network is as follows:
* Bridge ID Comparison : The Bridge ID (BID) is compared between the bridges in the network. A smaller value indicates a higher priority, meaning the bridge with the lowest Bridge ID is elected as the root bridge.
* RPC (Root Path Cost) Comparison : The path cost to reach the root bridge is calculated. The router with the lowest Root Path Cost (RPC) to the root bridge will have a higher priority for the election of the root port.
* Peer BID Comparison : If there is a tie in the Root Path Cost, the Peer BID is compared. A smaller Peer BID indicates a higher priority. This step ensures that if two routers have the same RPC, the one with the lower Peer Bridge ID wins.
* Local BID Comparison : If there is still a tie, the Local BID is compared. A smaller Local BID indicates a higher priority. This final step ensures that the router with the lowest local identifier is selected.
* Bridge ID Comparison : The first step in electing the root port is comparing the Bridge IDs. The bridge with the lowest Bridge ID becomes the root bridge . The Bridge ID is made up of the bridge priority and MAC address . The root bridge is the center of the network for STP, and all other ports will calculate their paths based on this root.
HCIP-Datacom-Core Technology Training Material (STP Concepts and Election Process) .
RPC (Root Path Cost) Comparison : Once the root bridge is selected, the network needs to determine the best path to the root. Each port on a non-root bridge will calculate the Root Path Cost (RPC) , which is the cumulative cost of reaching the root bridge from that port. The root port is the one that has the lowest RPC, meaning it provides the best path to the root bridge.
Reference : HCIP-Datacom-Core Technology Training Material (STP Path Selection) .
Peer BID Comparison : If multiple paths have the same Root Path Cost , the next step is to compare the Peer Bridge IDs . The bridge with the lowest Peer BID is chosen as the root port. This ensures a tie-breaking mechanism based on the neighbor ' s identifier.
Reference : HCIP-Datacom-Core Technology Training Material (STP Election Process) .
Local BID Comparison : If there is still a tie after comparing the Peer Bridge IDs , the Local Bridge ID is compared. A smaller Local BID indicates a higher priority, and the port with the lower Local BID will be selected as the root port.
Reference : HCIP-Datacom-Core Technology Training Material (STP Local Port Selection) .
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