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| Section | Weight | Objectives |
|---|---|---|
| WAN Interconnection Network Planning and Deployment | 8% | - WAN Interconnection Technologies
|
| Advanced Routing and Switching Technologies | 37% | - Advanced Switching Technologies
|
| Bearer WAN Planning and Deployment | 15% | - High-level Technology Deployment
|
| Campus Network Planning and Deployment | 23% | - Campus Network Service Deployment
|
| Network Automation Technologies and Practice | 17% | - Automation Foundation
|
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NEW QUESTION # 53
Which of the following is the benefit of VLAN aggregation?
Answer: B,C,D
NEW QUESTION # 54
Refer to the following command output on the router R1. Which of the following statements isincorrect?
< R1 > display interface Tunnel
Tunnel0/0/0 current state : UP
Line protocol current state : UP
Last line protocol up time : 15:21:23 UTC-08:00
Description: ! 0.0.3.3
Route Port, The Maximum Transmit Unit is 1500
Internet Address is 20.1.1.1/24
Encapsulation is TUNNEL, loopback not set
Tunnel source 10.0.1.1 (LoopBack0), destination 10.0.3.3
Tunnel protocol/transport GRE/IP, key disabled
keepalive disabled
Checksumming of packets disabled
Current system time: 15:21:37-08:00
300 seconds input rate 0 bits/sec, 0 packets/sec
300 seconds output rate 0 bits/sec, 0 packets/sec
13 seconds input rate 0 bits/sec, 0 packets/sec
13 seconds output rate 448 bits/sec, 0 packets/sec
9 packets output, 824 bytes
0 output error
Input bandwidth utilization : -
Output bandwidth utilization : -
Answer: D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Analyzing the output:
A). Key authentication is disabled for the tunnel:Correct. The output explicitly states " key disabled " .
B). The destination IP address of the tunnel is 10.0.3.3:Correct. The output shows " destination 10.0.3.3 " .
C). The tunnel is a GRE tunnel:Correct. The output states " Tunnel protocol/transport GRE/IP " .
D). Keepalive detection is enabled on the tunnel:Incorrect.The output clearly shows " keepalive disabled " .
Therefore, the correct answer isDbecause the tunnel doesnot have keepalive enabled.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei GRE Tunnel Configuration Guide
NEW QUESTION # 55
SR-MPLS is enabled on all routers. The label information encapsulated by R1 into a data packet is shown in the figure.
Which of the following is the forwarding path of the data packet?
Answer: B
Explanation:
Comprehensive and Detailed In-Depth
1. Understanding SR-MPLS (Segment Routing with MPLS):
Segment Routing (SR) leverages MPLS labels to define paths through the network.
The labels represent segments (nodes or specific paths) rather than traditional LDP or RSVP-TE labels.
The label stack determines the forwarding path through the network.
Top Label: Determines the next hop.
Next Label: After label pop, it indicates the subsequent hop.
2. Analyzing the Given Label Stack:
The label stack encapsulated by R1 is as follows:
Layer2: 2046
2013
2032
2024
2046
Layer3
The top label (2046) indicates that the next-hop router is R4.
After R4 pops the top label, the next label (2046) directs the packet to R6.
3. Forwarding Path Analysis:
Step 1: R1 sends the packet to R2 based on internal routing.
Step 2: R2 forwards the packet directly to R4 as dictated by the top label (2046).
Step 3: R4 pops the top label (2046) and checks the next label (again 2046), directing the packet to R6.
Step 4: R6 receives the packet as the final destination.
4. Why Option B is Correct:
The path R1-R2-R4-R6 matches the label stack processing in SR-MPLS.
The labels indicate the shortest path chosen by SR policies, which is R1 → R2 → R4 → R6.
The SR-MPLS label stack efficiently guides the packet through the optimal path without complex signaling.
Why Other Options Are Incorrect:
Option A (R1-R2-R3-R5-R6):
This path does not match the label sequence as the labels clearly indicate a direct path via R4, not through R3 and R5.
Option C (R1-R3-R2-R4-R6):
This path is longer and unnecessary, as the label stack indicates a more direct path via R2 and R4.
Reference:
Huawei HCIE-Datacom V1.0 Training Materials
Huawei Official Documentation: SR-MPLS Configuration Guide
RFC 8660 - Segment Routing with MPLS Data Plane
HCIE-Datacom Knowledge Base: Segment Routing and MPLS
NEW QUESTION # 56
When designing IGP routes for an enterprise bearer WAN, ensure that the metric of aggregation-layer links is smaller than that of access-layer links, so that data can be preferentially forwarded over aggregation-layer links.
Answer: A
Explanation:
IGP Metric Design in Enterprise WANs
In an enterprise bearer WAN, routing metrics determine path selection. The aggregation layer connects multiple access-layer devices to the core network, so it should have a lower metric to:
✅ Ensure traffic is forwarded through higher-capacity aggregation links instead of lower-bandwidth access links.
✅ Optimize traffic flow, reduce congestion, and improve network efficiency.
✅ Enhance reliability by preferring more stable aggregation links.
IGP Routing Protocols Considerations:
OSPF: Lower cost values indicate preferred paths.
IS-IS: Lower link metrics result in preferred forwarding paths.
Reference from Huawei HCIE-Datacom Documentation:
Huawei IGP Design Guide - Enterprise WAN Routing Optimization
HCIE-Datacom Training Material - Metric Calculation and Path Selection in OSPF/IS-IS
NEW QUESTION # 57
The following description of MED, correct:
Answer: B,D
NEW QUESTION # 58
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