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Huawei H12-891_V1.0 Certification Exam is a four-hour exam that consists of both theoretical and practical questions. H12-891_V1.0 exam is divided into two parts. The first part is a written exam, which includes multiple-choice questions and short answer questions. The second part is a lab exam, which requires candidates to configure and troubleshoot a real-life network scenario. The lab exam is conducted in a simulated network environment and tests the candidate's ability to apply their knowledge in a practical setting.
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Huawei H12-891_V1.0 HCIE-Datacom V1.0 exam is a specialized certification program that focuses on providing advanced-level knowledge and expertise in data communication technologies. HCIE-Datacom V1.0 certification is designed to validate the skills and knowledge of professionals who are working with complex data communication technologies and infrastructure.
NEW QUESTION # 134
On the campus network shown, IPv6 is deployed for service tests. Four routers are deployed on the network, and OSPFv3 is used for IPv6 network connectivity. An engineer checks the LSDB of R2 and obtains a Link-LSA. Which of the following statements about the LSA are correct?
Answer: A,B,D
Explanation:
In OSPFv3, Link-LSA (Type 8) is generated by a router for each of its interfaces to advertise:
The router's link-local address on that interface.
The IPv6 prefixes associated with the interface.
Flags and options, such as router priority or loopback indicators.
From the output:
Link-LSA (Interface GigabitEthernet0/0/0)
Originating Router: 10.1.2.2
Link-Local Address: FE80::2E0:FCFF:FECD:4F79
Prefix: 2001:DB8:2345:23::/64
A . The link-local address of R2's GE0/0/0 is FE80::2E0:FCFF:FECD:4F79→ This matches the Link-Local Address field in the LSA. ✅ B . The IPv6 address prefix of R2's GE0/0/0 is 2001:DB8:2345:23::/64→ This matches the Prefix field in the LSA. ✅ C . This LSA indicates that R2 does not support external routes but can participate in IPv6 route calculation→ ❌ Incorrect.
The Link-LSA does not provide any indication about external route capabilities.
It simply advertises interface-specific IPv6 and link-local info.
Whether R2 supports external routes depends on Type 5 (External) or Type 7 (NSSA) LSAs, not Link-LSAs.
D . This LSA is generated by R2→ The Originating Router: 10.1.2.2 is R2's router ID, so this LSA is definitely generated by R2. ✅ Correct Answers: A, B, D The Link-LSA in OSPFv3 contains:
The link-local address used by the originating router on the link.
A list of all IPv6 prefixes associated with the link.
Flags such as router priority and the Router-LSA options.
These LSAs are always generated by the router itself and are not flooded beyond the link.
NEW QUESTION # 135
Which of the following statements about BGP EVPN principles are correct in a scenario where a VXLAN tunnel is dynamically established through BGP EVPN?
Answer: B,C,D
Explanation:
BGP EVPN in VXLAN Tunneling
✅ A. MP_REACH_NLRI is used to carry routing information.
MP_REACH_NLRI (Multiprotocol Reachable Network Layer Reachability Information) is used in BGP updates to carry VXLAN reachability information.
✅ B. Several BGP EVPN routes are defined through BGP extension.
BGP EVPN introduces multiple route types, such as Type 2 (MAC/IP Advertisement), Type 3 (Inclusive Multicast), and Type 5 (IP Prefix Advertisement).
✅ D. MP_REACH_NLRI is used to carry the RT.
RT (Route Target) defines route import/export policies in VPN environments.
MP_REACH_NLRI carries the RT attribute in BGP EVPN updates.
❌ C. MP_REACH_NLRI is used to carry the RD.
Wrong! The Route Distinguisher (RD) is carried inside BGP attributes, but not in MP_REACH_NLRI.
Reference from Huawei HCIE-Datacom Documentation:
Huawei VXLAN BGP EVPN Configuration Guide - BGP EVPN Route Types
HCIE-Datacom Training Material - VXLAN Dynamic Tunnel Establishment
NEW QUESTION # 136
In Huawei SD-WAN Solution, which of the following tunneling technologies is used to establish data channels?
Answer: A,B
Explanation:
Understanding Huawei SD-WAN Tunneling Technologies
Huawei SD-WAN uses secure tunneling to connect branches, data centers, and cloud services.
🔹 Tunneling Technologies in SD-WAN:
✅ IPsec (Answer B) → Provides secure encrypted tunnels over public or private networks.
✅ GRE over IPsec (Answer D) → Encapsulates traffic inside GRE, then encrypts with IPsec, enabling support for multicast and non-IP traffic.
❌ A. WLAN (Incorrect Choice) → WLAN is a wireless technology, not a tunneling protocol.
❌ C. MPLS (Incorrect Choice) → MPLS is a core network transport technology but is not used to establish SD-WAN data channels directly.
Why are Answers B and D Correct?
✅ Huawei SD-WAN primarily uses IPsec for data encryption.
✅ GRE over IPsec is used when supporting multicast or dynamic routing protocols over tunnels.
✅ Reference: Huawei HCIE-Datacom Guide - SD-WAN Tunneling Mechanisms
NEW QUESTION # 137
Complete the basic processing procedure for DiffServ model-based QoS shown in the figure
Answer:
Explanation:
NEW QUESTION # 138
An engineer performed the ingestion operation on an OSPF router in a network of the company, is the following statement about the introduction of the routing LSA correct?
Answer: A,B
NEW QUESTION # 139
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