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| Section | Weight | Objectives |
|---|---|---|
| Bearer WAN Planning and Deployment | 15% | - High-level Technology Deployment
|
| WAN Interconnection Network Planning and Deployment | 8% | - WAN Service Optimization
|
| Advanced Routing and Switching Technologies | 37% | - Network Quality and Optimization
|
| Network Automation Technologies and Practice | 17% | - Huawei Automation Solutions
|
| Campus Network Planning and Deployment | 23% | - Campus Network Service Deployment
|
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問題 #299
HW users are transferring a very large number of files via TFTP. What protocol does TFTP rely on for transmission?
答案：D
問題 #300
As shown in the figure, when PE1 receives an ARP request packet, it forwards the packet to PE4. The packet then carries two labels. The label value 201 is carried by the EVPN Type ____ route. (Enter only digits.)
答案：
解題說明：
3
Explanation:
Understanding EVPN (Ethernet VPN) Label Allocation and ARP Handling
#What Happens in This Scenario?
1##CE1 (192.168.1.1) sends an ARP request to discover the MAC address of CE2 (192.168.1.2).
2##PE1 receives the ARP request and needs to forward it over the EVPN fabric.
3##To send the broadcast ARP request across the EVPN network, PE1 forwards the packet to PE4 using BUM (Broadcast, Unknown unicast, and Multicast) forwarding.
4##PE4, as the Designated Forwarder (DF), forwards the ARP request to CE2.
Role of Labels in EVPN VXLAN/MPLS Networks
#EVPN uses BGP to distribute MAC/IP reachability information using different route types.
#EVPN Type 2 Route (MAC/IP Advertisement Route):
Used forMAC-to-IP address mappingannouncements.
Ensuresremote VTEPs (PE routers) learn MAC-to-IP bindingsdynamically.
#EVPN Type 3 Route (Inclusive Multicast Route):
Used forBUM traffic (Broadcast, Unknown Unicast, Multicast).
Assigns a multicast label (e.g., 201) to be used for forwarding broadcast packets like ARP requests.
#In this case:
Thelabel 201is used forBUM traffic forwarding.
BUM traffic is handled using an EVPN Type 3 route.
Why is the Answer 3?
#EVPN Type 3 routes carry labels for BUM traffic, which includes ARP requests.
#Label 201 is used for multicast distribution, which is managed by Type 3 routes.
Real-World Application:
VXLAN Data Centers:UsesEVPN Type 3 routes to control BUM traffic efficiently.
Campus Networks:Preventsunnecessary flooding of ARP requests across VXLAN domains.
#Reference:Huawei HCIE-Datacom Guide - EVPN BGP Route Types and Multicast Labeling
問題 #301
Refer to the following command output on the router R3. Which of the following statements are correct?
<R3> display interface Tunnel
Tunnel0/0/0 current state : UP
Line protocol current state : UP
Last line protocol up time : 15:21:26 UTC-08:00
Description: HUAWEI, AR Series, Tunnel0/0/0 Interface
Route Port, The Maximum Transmit Unit is 1500
Internet Address is 20.1.1.2/24
Encapsulation is TUNNEL, loopback not set
Tunnel source 10.0.3.3 (LoopBack0), destination 10.0.1.1
Tunnel protocol/transport GRE/IP, key disabled
keepalive disabled
Checksumming of packets disabled
答案：A,B,D
解題說明：
From the output:
Tunnel destination IP address: Clearly shown as destination 10.0.1.1 ## Tunnel interface MTU: Shown as The Maximum Transmit Unit is 1500 ## Tunnel interface IP: Shown as Internet Address is 20.1.1.2/24 ## Tunnel source: Tunnel source 10.0.3.3 (LoopBack0) # Not 10.0.1.1 ## Therefore:
A- Correct
B- Correct
C- Correct
D- Incorrect (confuses destination as source)
Correct answers: A, B, C
問題 #302
When running OSPFv3 on a Huawei router, the OSPFv3 process automatically selects an interface address as the process router id
答案：B
問題 #303
The path of an SR-MPLS TE tunnel can be calculated by the controller or tunnel ingress.
答案：B
解題說明：
Understanding SR-MPLS TE (Segment Routing MPLS Traffic Engineering)
🔹 What is SR-MPLS TE?
Segment Routing (SR) replaces traditional MPLS LDP/RSVP-TE signaling.
Uses SR-TE policies to define network paths without requiring per-flow state on intermediate routers.
🔹 How is the SR-MPLS TE Path Calculated?
✅ By the SDN Controller (Centralized Path Computation)
The controller (e.g., Huawei iMaster NCE) calculates the optimal SR path based on:
Bandwidth requirements
Latency constraints
Traffic policies
The controller then delivers the SR policy to the ingress router.
✅ By the Ingress Router (Distributed Path Computation)
The ingress router computes the SR path dynamically based on local constraints.
This method is useful when no centralized controller is available.
Why is the Answer TRUE?
✅ Both centralized (controller-based) and distributed (ingress router-based) path computation are supported in SR-MPLS TE.
Real-World Application:
5G and Cloud WANs: Centralized path optimization reduces congestion dynamically.
Enterprise Networks: Local path computation ensures fast rerouting in case of failures.
✅ Reference: Huawei HCIE-Datacom Guide - SR-MPLS TE and Path Computation Methods
問題 #304
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