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| Section | Weight | Objectives |
|---|---|---|
| WAN Interconnection Network Planning and Deployment | 8% | - SD-WAN
|
| Network Automation | 17% | - Automation Technologies
|
| Advanced Routing and Switching Technology | 37% | - OSPF
|
| Bearer WAN Planning and Deployment | 15% | - SR (Segment Routing)
|
| Campus Network Planning and Deployment | 23% | - Network Services
|
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NEW QUESTION # 156
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: B
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 # 157
An SRv6 Policy can be either statically configured on a device or dynamically generated by the controller and then delivered to the device.
Answer: B
Explanation:
Understanding SRv6 (Segment Routing over IPv6) Policies
# What is an SRv6 Policy?
* A traffic engineering (TE) mechanism used in SRv6-enabled networks.
* Defines a set of Segment Routing (SR) paths that direct packets through a predefined set of waypoints.
* Uses SRv6 SIDs (Segment Identifiers) instead of MPLS labels.
# How Can SRv6 Policies Be Configured?# Static SRv6 Policy Configuration:
* Manually configured by network administrators.
* Used in predictable, fixed network paths.
# Dynamic SRv6 Policy Generation:
* Created dynamically by an SDN controller (e.g., Huawei iMaster NCE).
* The controller analyzes network conditions and adjusts paths automatically based on traffic load and link failures.
Why is the Answer TRUE?
# SRv6 policies can be configured manually or dynamically delivered by a controller.# SDN-based SRv6 solutions improve network automation and traffic engineering efficiency.
Real-World Application:
* Cloud Data Centers: Uses dynamic SRv6 policies for optimal traffic distribution.
* 5G Transport Networks: Uses SRv6 TE for low-latency service guarantees.
# Reference: Huawei HCIE-Datacom Guide - SRv6 Policy and SDN Integration
NEW QUESTION # 158
HW users are transferring a very large number of files via TFTP. What protocol does TFTP rely on for transmission?
Answer: C
NEW QUESTION # 159
Huawei Open Programmability System (OPS) uses HTTP methods to access managed objects to manage network devices. To facilitate script compilation, Huawei OPS provides the Python script template. In the Python script template, what are the contents of the Content-type and Accept fields in the header of an HTTP request packet?
Answer: A
Explanation:
Huawei Open Programmability System (OPS) and HTTP Request Headers
Huawei OPS allows network automation and programmability through HTTP-based APIs. When using Python scripts to send HTTP requests to network devices, the request headers must specify the content format for data exchange.
✅ B. Content-Type: text/json, Accept: text/json (Correct Answer)
Content-Type: text/json → Specifies that the request body contains JSON-formatted data.
Accept: text/json → Specifies that the response should be in JSON format.
NEW QUESTION # 160
The link quality of a company's network is poor, often failures lead to route oscillation, and even occasionally there are routing loops, in order to prevent the recurrence of these phenomena, the network administrator decided to deploy URPF in the whole network to improve the stability of the network
Answer: B
NEW QUESTION # 161
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