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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIE-Datacom V1.0 Written Exam |
| Exam Number: | H12-891_V1.0 |
| Available Languages: | English, Chinese |
| Certificate Validity Period: | 3 years |
| Exam Format: | Single choice questions, Multiple choice questions |
| Exam Price: | USD 300 (approx.) |
| Passing Score: | 600/1000 |
| Exam Duration: | 120 minutes |
| Related Certifications: | HCIP-Datacom HCIE-Datacom HCIA-Datacom |
| Real Exam Qty: | 60-70 |
| Recommended Training: | HCIE-Datacom Official Training Huawei Learning Platform |
| Exam Registration: | Huawei Talent Certification Platform Huawei Certification Exam Registration |
| 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 challenging exam that requires a significant amount of preparation. Candidates are expected to have a deep understanding of data communication technologies, including network protocols, routing, switching, and security. They should also be familiar with the latest industry trends and best practices. To pass the exam, candidates must demonstrate their ability to design, implement, and troubleshoot complex data communication networks.
NEW QUESTION # 261
The Serial Number field of LS is used to detect expired and duplicate LSAs. The field is a 32bt signed integer, so the small serial number is Ox8000000
Answer: B
NEW QUESTION # 262
Network administrator A wants to use an IP prefix list to match specific routes. Which of the following routes can be matched by the IP prefix list shown in this figure?
ip ip-prefix TEST permit 10.0.0.0 24 less-equal 30
Answer: A,B,C,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
The IP prefix list configuration:
ip ip-prefix TEST permit 10.0.0.0 24 less-equal 30
10.0.0.0/24: Matches because it falls within the10.0.0.0/24prefix with thesame prefix length (24).
10.0.1.0/24: Matches because it also falls within the/24network range.
10.0.2.0/24: Matches for the same reason as the above.
10.0.0.1/30: Matches because it falls within the/24 prefixand itssubnet length (30)is within theless-equal
30range.
The prefix list permits any route that falls within the10.0.0.0/24network with asubnet mask ranging from /24 to /30. Therefore,all given routes are matched.
NEW QUESTION # 263
A VRRP virtual router configuration VRID is 3 and the virtual IP address is 100 1. 1. 10, so what is the virtual MAC address?
Answer: A
NEW QUESTION # 264
As shown in the figure, ARP broadcast suppression is enabled on VTEP1 in BD 20 (VNI 200).
VTEP1 learns ARP information about PC2 through BGP EVPN routes.
When VTEP1 forwards the ARP request for PC1's MAC address to VTEP2,
What is the destination MAC address of the inner data frame?
Answer: A
Explanation:
Understanding VXLAN and ARP Suppression in BGP EVPN
VXLAN (Virtual Extensible LAN) is used to extend Layer 2 networks over Layer 3 infrastructure.
VXLAN uses VTEPs (VXLAN Tunnel Endpoints) to encapsulate and forward Layer 2 traffic.
BGP EVPN (Ethernet VPN) is used for MAC/IP address learning and distribution across VXLAN networks.
How ARP Request Forwarding Works in This Scenario?
1️⃣ ARP Broadcast Suppression Enabled (VXLAN Optimized Forwarding)
Since ARP broadcast suppression is enabled on VTEP1, the ARP request is not flooded.
Instead, VTEP1 checks its EVPN learned database to find PC2's MAC address (MAC C).
2️⃣ VTEP1 Encapsulates the ARP Request
VTEP1 encapsulates the ARP request in a VXLAN packet and sends it to VTEP2.
The original ARP frame inside the VXLAN tunnel still has:
Source MAC: MAC A (PC1's MAC)
Destination MAC: MAC C (PC2's MAC, learned via EVPN)
3️⃣ VXLAN Outer Headers
The outer VXLAN header uses:
Source IP: 1.1.1.1 (VTEP1)
Destination IP: 2.2.2.2 (VTEP2)
VNI (VXLAN Network Identifier): 200 (BD 20)
4️⃣ VTEP2 Receives and Forwards the ARP Request
VTEP2 decapsulates the VXLAN packet and forwards the original ARP request to PC2 (MAC C).
This ensures that only the intended receiver (PC2) gets the ARP request, preventing unnecessary broadcast flooding.
Why the Answer is MAC C?
✅ B. MAC C is Correct
The destination MAC of the inner data frame is PC2's MAC (MAC C).
This is because VTEP1 forwards the ARP request directly to VTEP2, which then forwards it to PC2.
Why Other Answers Are Incorrect?
❌ A. MAC B (Incorrect)
MAC B is VTEP1's MAC address, which is used in the outer VXLAN header, not in the inner Ethernet frame.
❌ C. MAC A (Incorrect)
MAC A is the source MAC of the ARP request (PC1), not the destination.
❌ D. MAC D (Incorrect)
MAC D is not mentioned in the topology, so it is irrelevant.
📖 Reference: Huawei HCIE Datacom - VXLAN BGP EVPN and ARP Suppression
NEW QUESTION # 265
Which of the following default routing delivery methods does OSPF support?( Multi-select)
Answer: A,B,D
NEW QUESTION # 266
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