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The H12-891_V1.0 Exam covers a wide range of topics, including network design, routing protocols, network security, network management, and more. H12-891_V1.0 exam consists of both theoretical and practical components, requiring candidates to demonstrate their understanding of key concepts and their ability to apply them in real-world scenarios. Successful candidates receive the HCIE-Datacom V1.0 certification, which is recognized worldwide as a mark of excellence in the field of data communication.
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Huawei H12-891_V1.0 HCIE-Datacom V1.0 certification program is a highly respected certification program in the industry. HCIE-Datacom V1.0 certification program is recognized by many organizations and companies as a benchmark for excellence in data communication technologies. Professionals who have successfully completed the certification program are highly sought after by companies that are looking for experts in data communication technologies. Huawei HCIE-Datacom V1.0 Sample Questions (Q212-Q217):NEW QUESTION # 212
As shown in the figure, SW1 and SW2 use asymmetric IRB (Integrated Routing and Bridging) forwarding, and PC1 and PC2 communicate with each other. Which of the following is the destination MAC address of the original data frame in the packet sent from VTEP1 to VTEP2?
A. MAC B
B. MAC C
C. MAC A
D. MAC D
Answer: B
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding VXLAN Asymmetric IRB Forwarding:
InVXLAN (Virtual Extensible LAN)networks, there are two types of IRB forwarding:Symmetric IRBandAsymmetric IRB.
InAsymmetric IRB, routing occurs only at the ingress VTEP (Virtual Tunnel Endpoint).
Theingress VTEP (VTEP1)encapsulates the original data frame and sends it to theegress VTEP (VTEP2)over the VXLAN tunnel.
Thedestination MAC addressof the original Ethernet frame is theMAC address of the Layer 3 gateway (VBDIF)at the egress VTEP.
2. Analyzing the Topology:
PC1 (172.16.2.1/24) withMAC Ais sending traffic to PC2 (172.16.1.2/24) withMAC D.
Both PCs are in different subnets, so inter-subnet routing is required.
VTEP1 (1.1.1.1)on SW1 is the ingress VTEP.
VTEP2 (2.2.2.2)on SW2 is the egress VTEP.
TheVXLAN Network Identifier (VNI)for the traffic is100.
SW1 has two VBDIF interfaces:
VBDIF10 (MAC B)- Interface for BD10 (172.16.2.254).
VBDIF20 (MAC C)- Interface for BD20 (172.16.1.254).
3. Packet Flow in Asymmetric IRB:
Step 1C1 sends a packet destined for PC2. The packet is routed at theingress VTEP (SW1)using theVBDIF interface (VBDIF10 with MAC B).
Step 2:Theingress VTEP (SW1)encapsulates the packet in aVXLAN header(VNI 100) and sends it toVTEP2.
Step 3:Theoriginal data frame inside the VXLAN packetmust have adestination MAC addressthat matches thegateway MAC address (VBDIF20 - MAC C)at theegress VTEP (SW2).
Step 4:On reachingVTEP2, the encapsulation is removed, and the original frame withdestination MAC Cis forwarded.
Step 5:VTEP2performs Layer 3 routing to forward the packet toPC2.
4. Why MAC C is Correct:
Inasymmetric IRB forwarding, the routing decision at the ingress VTEP ensures that thedestination MACin the original frame is set to theVBDIF (gateway) MAC of the egress VTEP.
Since theegress VTEP (SW2)hasVBDIF20 (MAC C)for the destination subnet (172.16.1.0/24), thedestination MAC addressof the original frame isMAC C.
NEW QUESTION # 213
For Layer 2 VPN technology, the following statement is correct?( Multiple choice questions).
A. VPLS is a widely used technology in the live network, which can provide transparent transmission of three-layer messages and achieve multi-point access.
B. The VPLS configuration is complex and the Layer 2 network transmits BUM packets.
C. BGP EVPN addresses issues such as MAC address drift and multi-tenancy that VPLS cannot support.
D. BGP EVPN supports features such as tenant isolation, Multi-homing , and broadcast suppression.
Answer: B,D
NEW QUESTION # 214
A company's two-layer phase network architecture as shown in the figure, when the engineer is configured to find that the business between departments can not communicate, through the command to view the status of the equipment as follows, please determine the possible causes?
A. Inconsistent Registry Name configuration between text exchange machines
B. The BPDU interval between switches is not configured
C. The Revislon Level configuration is inconsistent between switches
D. The Transition VLAN mapping between the handover machines is not configured to be caused
Answer: A,C,D
NEW QUESTION # 215
As shown in the following topology, EBGP is running between ASI0O0, AS.203, AS.30, AS8400, and the neighbor relationship has been established as RECEIVed by AS4O0 When AS1OO issues a 1..11/2 CIDR segment BGP route, the path order recorded in the ASPath attribute is correct
A. 10,200,3
B. 400,300,200,100
C. 100,200,300,400
D. 300,200,100
Answer: D
NEW QUESTION # 216
The Option field in OSPFv3 appears in all LSAs
C1 sends a packet destined for PC2. The packet is routed at theingress VTEP (SW1)using theVBDIF interface (VBDIF10 with MAC B).
