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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Automation | 17% | - Automation Technologies
|
| Topic 2: Campus Network Planning and Deployment | 23% | - Campus Network Architecture
|
| Topic 3: WAN Interconnection Network Planning and Deployment | 8% | - SD-WAN
|
| Topic 4: Bearer WAN Planning and Deployment | 15% | - Traffic Engineering
|
| Topic 5: Advanced Routing and Switching Technology | 37% | - OSPF
|
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NEW QUESTION # 120
During WLAN planning and design, channels 1, 6, and 11 are recommended on the 2.4 GHz frequency band, and channels 1, 5, 9, and 13 are recommended in high-density scenarios. On the 5 GHz frequency band, it is recommended thathigh-frequency and low-frequency channels of adjacent APs be staggered to prevent overlapping.
Answer: A
Explanation:
On the2.4 GHzband, onlythree non-overlapping channelsexist:1, 6, and 11.
Inhigh-density WLAN scenarios, channels like1, 5, 9, and 13can be used withlower transmit powerto reduce co-channel interference - though they slightly overlap, they can work in dense deployments when managed properly.
On the5 GHzband, there are many non-overlapping channels. It's recommended tostagger high and low channelsamong adjacent APs toavoid interference.
Correct answer: A. TRUE
NEW QUESTION # 121
OSPFV is the GP running on the P4 network) OSPF3 is the KGP running on the IP6 network. OsPFV works the same basic way as OSPF2, such as elections for DR and BDR. As shown in the figure, an engineer uses three routers for IP6 service testing, and he wants to interconnect the IPv6 network by running OSPFv3 Which of the following statements is correct regarding the election of the network DR?
Answer: B,C,D
NEW QUESTION # 122
In the following figure, a GRE tunnel is established between R1 and R2. If the command ping -a 10.1.1.1
10.3.1.1 is run on R1, which of the following statements is correct about the ICMP packet sent by GE0/0/1 of R1?
Answer: A,B
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. GRE Tunnel Configuration Details:
GRE (Generic Routing Encapsulation)is used to encapsulate packets for transmission between two endpoints.
The tunnel is created betweenR1andR2:
R1 Tunnel IP:10.1.1.1
R2 Tunnel IP:10.3.1.1
Source IP of Tunnel:10.0.12.1 (R1)
Destination IP of Tunnel:10.0.12.2 (R2)
The command used: ping -a 10.1.1.1 10.3.1.1
Source IP (Inner IP):10.1.1.1
Destination IP (Inner IP):10.3.1.1
2. GRE Encapsulation Process:
When thepingcommand is executed from R1 to R2 through the GRE tunnel:
Theoriginal ICMP packetwill have:
Source IP:10.1.1.1
Destination IP:10.3.1.1
This ICMP packet (inner packet) will be encapsulated using GRE.
GRE Encapsulation:
Outer IP Header:
Source IP:10.0.12.1 (R1 GE0/0/1 interface)
Destination IP:10.0.12.2 (R2 GE0/0/1 interface)
Inner IP Header:
Source IP:10.1.1.1 (Tunnel0/0/0 on R1)
Destination IP:10.3.1.1 (Tunnel0/0/0 on R2)
Theouter IP headeris used fortunnel routingbetween thephysical interfaces(GE0/0/1).
Theinner IP headerrepresents thelogical tunnel IPsused for communication between R1 and R2.
3. Correct Answer Analysis:
Option A:
Correct.
Theouter IP headeraddresses are10.0.12.1and10.0.12.2, representing thephysical interfaces (GE0/0/1)used to establish the tunnel.
Option C:
Correct.
Theinner IP headeraddresses are10.1.1.1and10.3.1.1, representing thelogical tunnel interfacesused for communication.
4. Why Other Options Are Incorrect:
Option B:
Incorrect.
Thedestination IP in the outer headershould be thepeer physical IP (10.0.12.2), not the tunnel IP (10.3.1.1).
Option D:
Incorrect.
Theinner IP destinationis thetunnel IP (10.3.1.1), not thephysical IP (10.0.12.2).
References:
Huawei HCIE-Datacom V1.0 Training Materials
Huawei Official Documentation: GRE Tunnel Configuration Guide
RFC 2784 - Generic Routing Encapsulation (GRE)
HCIE-Datacom Knowledge Base: GRE and Tunnel Technologies
NEW QUESTION # 123
The TTL field encapsulated in the MPLS label header can prevent infinite loops of MPLS packets. Which of the following statements regarding the TTL field are correct?
Answer: B,C,D
Explanation:
TheTime-To-Live (TTL) fieldin MPLS is essential forpreventing infinite loopsandenhancing security.
MPLS TTL Field Functionality:
It prevents packets fromcirculating indefinitelyin the MPLS network.
It allowstraceroute (tracert) to identify MPLS hopswhen TTL propagation is enabled.
Explanation of Correct Answers:#B. The processing of IP TTL copy hides the LSR in an MPLS domain, improving security.
IfTTL propagation is disabled, MPLS routers do not decrease TTL, hidinginternal LSRsfrom traceroute, enhancing security.
#C. MPLS provides two TTL processing modes:
Default Mode:The MPLS TTLcopies the IP TTL valuewhen an IP packet enters the MPLS network.
Uniform Mode:The ingress LERsets the MPLS TTL to 255, so it does not decrement.
#D. MPLS encapsulation in frame mode supports the TTL field, while cell mode does not.
Frame Mode (Ethernet, PPP, etc.) supports TTL.
Cell Mode (ATM/MPLS) does not support TTL.
Incorrect Answer Explanation:#A. If TTL copy is disabled, users can use the tracert function to view MPLS hops.
Wrong!If TTL propagation is disabled, tracertcannotsee LSRs inside the MPLS core network.
Reference from Huawei HCIE-Datacom Documentation:
Huawei MPLS Technology Guide - TTL Field & Loop Prevention
HCIE-Datacom MPLS VPN Configuration Guide - Traceroute in MPLS Networks
NEW QUESTION # 124
In the gRPC-based telemetry protocol, the data model layer consists of theRPC layer,telemetry layer, andservice data layer. Drag the.proto fileto the layer where the file should be located.
Answer:
Explanation:
Explanation:
A screenshot of a computer AI-generated content may be incorrect.
Comprehensive and Detailed In-Depth Explanation:
ThegRPC-based telemetry protocolutilizesprotocol buffers (.proto files)to define the structure and data format used in communication between a client and a server. In Huawei's telemetry architecture, these files are categorized based on their roles in the data model.
1. RPC Layer:
File:huawei-grpc-dialin.proto
TheRPC layer (Remote Procedure Call layer)handles communication between the client and server.
The filehuawei-grpc-dialin.protodefines thegRPC service interfaces, message structures, and procedures for remote method invocation.
It is essential forestablishing communicationandinvoking telemetry data collection.
Function:Managesdial-in and dial-out connectionsbetween the telemetry client and the server.
2. Telemetry Layer:
File:huawei-telemetry.proto
Thetelemetry layeris responsible forcollecting, packaging, and exporting telemetry data.
The filehuawei-telemetry.protocontains thedata modelused for telemetry reporting, includingstreaming data formatsandtelemetry messages.
It defines how thecollected datais organized and transmitted.
Function:Provides astructured way to export telemetry datain real-time or batch mode.
3. Service Data Layer:
File:huawei-debug.proto
Theservice data layercontains data models related todiagnostics, debugging, and operational data.
The filehuawei-debug.protois used tocollect debugging informationfrom network devices.
This file is crucial fortroubleshooting and monitoring the healthof the system.
Function:Facilitatesdebugging and diagnostic telemetry data collection.
Why This Mapping Is Correct:
The mapping is based on thefunctional role of each layerand thepurpose of each .proto filein the Huawei gRPC-based telemetry architecture.
Correctly identifying the file location is crucial foreffective telemetry configurationanddata collection.
NEW QUESTION # 125
......
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