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Huawei H12-821_V1.0 Exam : HCIP-Datacom-Core Technology V1.0
- Exam Code: H12-821_V1.0
- Exam Name: HCIP-Datacom-Core Technology V1.0
- Updated: Oct 05, 2026
- Q & A: 378 Questions and Answers
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Huawei H12-821_V1.0 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Routing Basics | - IP Routing Fundamentals
|
| Multicast | - IP Multicast Technologies
|
| Network Service and Management | - O&M Technologies
|
| Network Security | - Security Technologies
|
| IS-IS | - IS-IS Fundamentals
|
| Network Solutions | - Enterprise Network Solutions
|
| Network Reliability | - Reliability Technologies
|
| BGP | - BGP Technologies
|
| WLAN | - Wireless Networking
|
| Ethernet Switching Technology | - Switching Fundamentals
|
| IPv6 | - IPv6 Fundamentals
|
| Routing and Traffic Control | - Traffic Management
|
| OSPF | - OSPF Fundamentals
|
Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions:
Question #1
As shown in the figure, data traffic is forwarded in tunnel mode along the path of STA - > HAP - > HAC - > upper-layer network before roaming. What is the flow direction of data traffic after Layer 3 roaming?
- A. STA - > FAP - > FAC - > Upper-layer network
- B. STA - > FAP - > FAC - > HAC - > Upper-layer network
- C. STA - > FAP - > FAC - > HAC - > HAP - > Upper-layer network
- D. STA - > FAP - > FAC - > HAC - > HAP - > HAC - > Upper-layer network
Correct Answer: B 🗳️
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Question #2
When receiving a packet, a Huawei router matches the packet against ACL rules. The default ACL matching order used by the Huawei router is.
Reveal Solution Discussion 0Correct Answer:
Sequential
Explanation:
ACL Matching in Huawei Routers:
* Access Control Lists (ACLs) are used to filter packets based on specific criteria, such as source
/destination IP, ports, or protocols.
* When a packet arrives, the Huawei router processes it against the configured ACL rules to decide whether to permit or deny the packet.
Reference: HCIP-Datacom-Core Technology Training Material (ACL Principles and Configuration).
Sequential Matching Order:
By default, Huawei routers match packets against ACL rules sequentially. This means:
The router checks the packet against rules in the order they are listed, starting from the top of the ACL.
The first rule that matches the packet ' s attributes is applied, and no further rules are checked. This is known as the first-match principle.
If no rules match, the packet is denied by default (implicit deny).
Reference: HCIP-Datacom Advanced Routing & Switching Technology (ACL Matching Mechanism).
Example of Sequential Matching:
Consider the following ACL rules:
Rule 10: Permit IP 192.168.1.0/24
Rule 20: Deny IP 192.168.1.1
If a packet with source IP 192.168.1.1 arrives:
The router matches it against Rule 10 (Permit 192.168.1.0/24) and allows the packet.
Rule 20 is not evaluated because the first match (Rule 10) already applies.
Alternative Matching Orders:
Some routers or configurations allow batch matching (evaluating all rules) for specific scenarios, but this is not the default behavior in Huawei routers.
Conclusion:
The default ACL matching order on Huawei routers is sequential, and the first matching rule determines the action applied to the packet.
Question #3
Which of the following statements regarding the summary automatic command and BGP route summarization is false?
- A. After this command is configured, BGP summarizes routes based on natural network segments
- B. This command enables automatic summarization for the locally imported routes
- C. After this command is configured, BGP sends only the summarized routes to peers
- D. This command is used to implement automatic summarization. Automatic summarization takes precedence over manual summarization
Correct Answer: D 🗳️
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Question #4
The following figure shows the OSPF network of an enterprise and the OSPF configurations of R1. Which of the following statements is false about the network?
- A. R2 can access the server.
- B. GE 0/0/1 of R1 cannot accept OSPF packets.
- C. The network segment to which GE 0/0/1 of R1 belongs cannot be advertised.
- D. GE 0/0/1 of R1 cannot send OSPF packets.
Correct Answer: C 🗳️
Explanation: Only visible for VCEEngine members. You can sign-up / login (it's free).
Question #5
Which of the following statements regarding OSPF is true?
- A. OSPF uses the Bellman-Ford algorithm, and each router independently runs this algorithm.
- B. OSPF performs LSDB update every 30 minutes.
- C. OSPF does not have an acknowledgement mechanism. Therefore, OSPF relies on the upper-layer protocol, TCP, for acknowledgement.
- D. OSPF floods a LSU packet at an interval of 5s.
Correct Answer: B 🗳️
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