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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIE-Datacom V1.0 Written Exam |
| Exam Number: | H12-891_V1.0 |
| Available Languages: | Chinese, English |
| Real Exam Qty: | 60-70 |
| Certificate Validity Period: | 3 years |
| Exam Duration: | 120 minutes |
| Exam Format: | Multiple choice questions, Single choice questions |
| Passing Score: | 600/1000 |
| Related Certifications: | HCIP-Datacom HCIE-Datacom HCIA-Datacom |
| Exam Price: | USD 300 (approx.) |
| Recommended Training: | HCIE-Datacom Official Training Huawei Learning Platform |
| Exam Registration: | Huawei Certification Exam Registration Huawei Talent Certification Platform |
| Sample Questions: | Huawei H12-891_V1.0 Sample Questions |
| Exam Way: | Computer-based online or authorized test center exam (via Huawei certification system / Pearson VUE where applicable). |
| Pre Condition: | Recommended to hold HCIP-Datacom certification or equivalent knowledge before attempting HCIE-Datacom exam. |
| Official Syllabus URL: | https://e.huawei.com/en/talent/#/cert/overview |
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Huawei H12-891_V1.0 (HCIE-Datacom V1.0) certification exam is a globally recognized certification program that validates the skills and knowledge required to design, implement, and troubleshoot complex data communication networks. HCIE-Datacom V1.0 certification exam covers a wide range of topics related to data communication, including network architecture, protocols, security, and virtualization. HCIE-Datacom V1.0 certification exam is an essential credential for professionals who want to advance in their careers in the field of data communication.
NEW QUESTION # 229
The following statement about IPSG technology is correct (single choice).
Answer: D
NEW QUESTION # 230
In the following figure, R1, R2, R3, and R4 all belong to OSPF area 0. The link costs are marked in the figure. The Loopback0 addresses of R1, R2, R3, and R4 are advertised to OSPF. R1, R2, and R3, which are R4 clients, use Loopback0 to establish an iBGP peer relationship with R4. The directly connected network segment 172.20.1.4/32 of R4 is advertised to BGP. Which of the following statements are correct about the direction of traffic from R1 to 172.20.1.4/32?
Answer: B,C
Explanation:
Let's analyze the scenario and each statement carefully based on OSPF path selection and BGP behavior in Huawei routers.
โ
Option A: The preferred path is R1-R3-R4.
According to the OSPF cost values:
R1-R3-R4: Cost = 1 + 1 = 2
R1-R2-R4: Cost = 2 + 2 = 4
OSPF chooses the lowest-cost path to reach a destination. Therefore, R1 will prefer the R1-R3-R4 path to reach 172.20.1.4/32.
Huawei Datacom Reference:
"OSPF selects routes based on the shortest path calculated using link costs. The router always selects the path with the lowest cost." (Source: HCIE-Datacom Study Guide v3.0 - OSPF Path Selection, Chapter 5)
โ
Option B: If the stub router on-startup command is run on R3, packet loss occurs during the power-off process of R3 but no packet loss occurs during the startup process of R3.
When R3 is powered off, OSPF needs to reconverge, which causes temporary packet loss.
When R3 starts up, it will advertise itself as a stub router using the stub-router on-startup command. This tells OSPF not to use R3 as a transit path during the startup period, thus preventing traffic blackholing.
Huawei Datacom Reference:
"stub-router on-startup command prevents a newly started router from being used as a transit node by OSPF, allowing routing to remain stable during convergence." (Source: HCIE-Datacom Study Guide v3.0 - OSPF Stub Router Functionality, Chapter 6.2)
โ Option C: The preferred path is R1-R2-R4.
This is incorrect because the OSPF path cost via R2 is higher (4) than the cost via R3 (2).
โ Option D: Packet loss occurs during both the power-off and startup processes of R3.
Incorrect. As explained above, when the stub-router on-startup command is used, packet loss is avoided during startup, but still occurs during power-off since the alternate path requires convergence.
NEW QUESTION # 231
Based on the figure, which of the following statements are correct?
<R1>tracert 172.17.1.5
1 10.1.12.2 40 ms 10 ms 10 ms
2 10.1.24.2 30 ms 20 ms 20 ms
3 10.1.34.1 20 ms 20 ms 20 ms
4 10.1.13.1 20 ms 20 ms 10 ms
5 10.1.12.2 20 ms 30 ms 20 ms
6 10.1.24.2 30 ms 30 ms 30 ms
7 10.1.34.1 50 ms 40 ms 40 ms
8 10.1.13.1 20 ms 30 ms 30 ms
Answer: C
Explanation:
Comprehensive and Detailed In-Depth
The traceroute output shows that the path from R1 to the destination 172.17.1.5 is looping. After reaching the IP 10.1.13.1, the path goes back to 10.1.12.2, repeating the previous hops. This indicates a routing loop, where R1 continuously forwards packets through a circular path, never reaching the destination. Routing loops typically occur due to inconsistent or incorrect routing table entries, often because of routing protocol misconfigurations.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei Routing and Switching Troubleshooting Guide
NEW QUESTION # 232
What are the main reasons why RSTP converges faster than STP?
Answer: A
NEW QUESTION # 233
As shown in the figure, all routers declare the loopback address in OSPF where the R storage does not return address is 1022 [2 declares 10033[ at the Ael.R3 ring E port[ 92101102A External routing in order to win light R win L away from the negative cut.
The noodle command is as follows: (multi-select) [BIppprefixt permlt 1001.1.024 [R1] ospf1
Answer: B,C,D
NEW QUESTION # 234
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