[2025年09月]更新のH12-891_V1.0試験問題集、H12-891_V1.0練習テスト問題
検証済みH12-891_V1.0問題集PDF資料 [2025]
この試験は、ネットワークアーキテクチャと設計、ネットワークプロトコル、ネットワークセキュリティ、ネットワーク管理など、データ通信技術に関連する幅広いトピックをカバーする多肢選択の質問で構成されています。この試験は、データ通信技術に関連する複雑な問題を解決する候補者の能力をテストし、クライアントのニーズを満たすソリューションを設計および実装する能力を実証するように設計されています。
質問 # 41
A network administrator needs to retrieve atoken IDfromiMaster NCEusing the following Python code:
import requests
nbi_name = "[email protected]"
nbi_pwd = "qqcOVcVel@"
host = "139.9.213.72"
port = "18002"
URI = "/controller/v2/tokens"
post_token_url = "https://" + host + ":" + port + URI
headers_post = {'Content-Type': 'application/json', 'Accept': 'application/json'} r = requests.post(post_token_url, headers=headers_post, json={"userName": nbi_name, "password":
nbi_pwd}, verify=incorrect)
Which of the following statements is incorrect?
- A. The HTTP request uses the GET method to query the token value.
- B. The request body is inJSON format.
- C. You can run print(r.json()) to display the response message sent from the server.
- D. Token resources are located at https://139.9.213.72:18002/controller/v2/tokens.
正解：A
解説：
Comprehensive and Detailed Explanation:
#Analyzing the Python Code:
#(A) Correct# print(r.json()) prints the response JSON, showing thetoken ID.
#(B) Correct# The token request URL is correctly specified.
#(D) Correct# json={"userName": nbi_name, "password": nbi_pwd} confirms the requestbody is in JSON format.
#(C) Incorrect:
The requestuses POST, not GET (requests.post() is explicitly called).
#Reference:Huawei HCIE Datacom - RESTful API Authentication in iMaster NCE
質問 # 42
Which of the following statements about configuring user access authentication is incorrect?
- A. To implement network access control on users, you need to determine the domains to which they belong and the AAA schemes that they use.
- B. If the RADIUS or HWTACACS server is used for authentication, you need to configure parameters for interconnection with the authentication server in the AAA scheme.
- C. You need to bind an access profile to an authentication profile to specify the user authentication mode.Then, apply the authentication profile to an interface to enable network access control.
- D. You can configure an 802.1X access profile, a MAC access profile, a Portal access profile, or a multi- mode authentication profile based on the actual authentication requirements on the network.
正解：C
解説：
Huawei'suser access authentication configurationincludes the following components:
AAA scheme: Defines how users are authenticated (local, RADIUS, HWTACACS, etc.).
Domain: Groups users and associates them with an AAA scheme.
Access profile: Defines access control rules like 802.1X, MAC, Portal, or multi-mode authentication.
Correct workflow:
Bind theauthentication profile(which references the access profile) to theuser access interface.
Not the other way around.
Incorrect statement:
D:It incorrectly states youbind the access profile to the authentication profile, when in fact, theauthentication profile binds the access profileand is applied to the interface.
Correct answer: D
質問 # 43
The following statement about the BFD one-arm echo function is correct (multiple choice).
- A. The BFD one-arm echo function must be configured with local identifiers and carrier identifiers
- B. The default destination IP address for the protocol message for BFD one-arm echo is 22400184
- C. BFD One-Arm Echo function is suitable for scenarios where one device supports BDD and the other device does not support
- D. After the BFD one-arm echo function is turned on, the destination IP and source IP of the BFD message are inducted
正解：C、D
質問 # 44
An O&M platform mainly provides unified monitoring and performance management for network devices.
Which of the following is NOT device monitoring data?
- A. Management-plane data
- B. Monitoring-plane data
- C. Data-plane data
- D. Control-plane data
正解：B
解説：
Understanding Network Monitoring Data Categories
#Network devices operate across three functional planes:
#A. Management Plane:
Handlesdevice configuration, authentication, and monitoring.
Example:SNMP, SSH, NETCONF logs.
#B. Data Plane (Forwarding Plane):
Handlespacket forwarding and switching.
Example:Interface statistics, traffic rates, dropped packets.
#C. Control Plane:
Handlesrouting, signaling, and protocol operations.
Example:BGP, OSPF, and MPLS signaling messages.
#D. Monitoring Plane (Incorrect Choice):
There is no "monitoring plane" in network architecture.
Monitoring tools collect data frommanagement, control, and data planes, butdo not form a separate plane.
Why is the Answer D (Monitoring-plane data)?
#Monitoring-plane does not exist as a separate category in network architecture.
#O&M tools collect data from management, control, and data planes, but do not define a separate "monitoring plane".
Real-World Application:
Huawei iMaster NCE-Campus & iMaster NCE-WANcollect real-timenetwork statistics and alarms.
Network Performance Monitoring (NPM)toolsanalyze control-plane eventsto detect failures.
#Reference:Huawei HCIE-Datacom Guide - Network Planes and Performance Monitoring
質問 # 45
A VGMP packet is encapsulated with a UDP header and a VGMP header. By default, a VGMP packet uses UDP port _____.
正解：
解説：
512
Explanation:
Understanding VGMP (Virtual Gateway Management Protocol)
#What is VGMP?
VGMP (Virtual Gateway Management Protocol) is used in Huawei firewalls to manage hot standby (HRP - Hot Standby Routing Protocol).
Ensures that theactive and standby firewalls synchronize their statesfor high availability.
#How Does VGMP Work?
TheActive and Standby firewalls exchange VGMP packetsto maintain state synchronization.
These packets are encapsulatedwithin UDPfor transport.
Thedefault UDP port for VGMP is 512.
Why is the Answer 512?
#Huawei firewalls use UDP port 512 by default for VGMP communication.
#This ensures that VGMP heartbeats and synchronization messages are correctly processed.
Real-World Application:
Enterprise Firewalls:VGMP ensuresfailover between active and standby firewalls.
Carrier-Grade Firewalls:UsesVGMP with HRP to achieve zero-downtime firewall redundancy.
#Reference:Huawei HCIE-Datacom Guide - VGMP and HRP High Availability Mechanisms
質問 # 46
An LSR (Label Switching Router) supports various label retention modes. Which of the following statements regarding the liberal mode are correct?
- A. An LSR reserves all labels distributed by its neighbor.
- B. The liberal mode requires more memory and label space.
- C. This label retention mode saves memory and label space.
- D. An LSR retains labels from a neighboring LSR only when the neighbor is its next hop.
正解：A、B
解説：
Understanding MPLS Label Retention Modes
In MPLS (Multiprotocol Label Switching), a Label Switching Router (LSR) can operate in one of two label retention modes:
1## Liberal Label Retention Mode (LLRM)
* Stores all labels received from neighbors, even if they are not immediately used.
* Advantage: Fast convergence during link failures.
* Disadvantage: Consumes more memory & label space.
2## Conservative Label Retention Mode (CLRM)
* Only keeps labels for the best next-hop path.
* Advantage: Saves memory & label space.
* Disadvantage: Slower convergence when topology changes.
Why are C and D Correct?
# C. An LSR reserves all labels distributed by its neighbor.
* Correct: In Liberal Mode, the router accepts and stores all labels received, even for non-best paths.
# D. The liberal mode requires more memory and label space.
* Correct: Since the router keeps all labels, it requires higher memory & storage.
Why are A and B Incorrect?
# A. An LSR retains labels from a neighboring LSR only when the neighbor is its next hop.
* Incorrect: This describes Conservative Mode, not Liberal Mode.
# B. This label retention mode saves memory and label space.
* Incorrect: Liberal Mode consumes more memory, not less.
Real-World Application
* Liberal Mode is used in large-scale MPLS networks where fast failover is critical.
* Conservative Mode is preferred in memory-constrained environments.
# Reference: Huawei HCIE-Datacom Study Guide - MPLS Label Retention Modes
質問 # 47
Regarding the BGP/MPLS IP VPN network architecture, what is the error described below?
- A. sites can be accessed each other through vPNs, and a site can only belong to a VPN
- B. P devices only need basic MPLS forwarding capabilities and do not maintain VPN-related information
- C. BGP/MPLSIPVPN network architecture consists of CE (Customer Edge), PE (Provider Edge) and P (Provider), of which PE and P Is a carrier device, CE is BGP/MPLSIPVPN with Household equipment
- D. Under normal circumstances, CE devices are not aware of the presence of VPN, and CE devices do not need to support MPLS MP-BGP, etc
正解：A
質問 # 48
As shown in the figure, PE1 establishes an EVPN peer relationship with each of PE2 and PE3. When the network is initialized, CE1 sends an ARP request packet.
Which of the following statements are correct about how a PE processes the packet?
- A. PE3 forwards the packet to CE1.
- B. When forwarding the packet to PE3, PE1 needs to add the BUM traffic label allocated by PE3 to the packet.
- C. PE2 forwards the packet to CE1.
- D. PE1 sends a MAC/IP advertisement route carrying the MAC address of CE1.
正解：A、B、D
解説：
Understanding EVPN (Ethernet VPN) and ARP Request Handling
#What is EVPN?
EVPN (Ethernet VPN) is aBGP-based control plane for VXLANthat improvesLayer 2 & Layer 3 network scalability.
Eliminatesflood-and-learn behaviorusingBGP MAC/IP advertisement routes.
#Why is an ARP Request Sent?
WhenCE1 (192.168.1.1/24) wants to communicate with CE2 (192.168.1.2/24), it sends anARP requestto discover the MAC address of CE2.
#How Does EVPN Process the ARP Request?
1##PE1 receives the ARP request from CE1.
2##PE1 sends a MAC/IP advertisement route (Type 2 EVPN route) to inform PE2 and PE3 of CE1's MAC address.
3##PE1 forwards the ARP request as BUM (Broadcast, Unknown unicast, and Multicast) traffic to PE2 and PE3.
4##PE3 (Designated Forwarder - DF) forwards the packet to CE2.
5##PE2 (Non-DF) does NOT forward the packet to avoid loops.
Analysis of the Answer Choices:
#A. When forwarding the packet to PE3, PE1 needs to add the BUM traffic label allocated by PE3 to the packet.
Correct:
BUM (Broadcast, Unknown Unicast, Multicast) traffic in EVPNis encapsulated with aspecial labelassigned by the receiving PE.
PE1adds the BUM traffic label for PE3before sending the ARP request.
#B. PE1 sends a MAC/IP advertisement route carrying the MAC address of CE1.
Correct:
EVPN Type 2 MAC/IP advertisement routesare sent to inform other PEs of CE1's MAC/IP binding.
#C. PE2 forwards the packet to CE1.
Incorrect:
PE2 is the Non-Designated Forwarder (Non-DF)anddoes NOT forward BUM trafficto avoid loops.
#D. PE3 forwards the packet to CE1.
Correct:
PE3 is the Designated Forwarder (DF) for this segment, meaning itforwards the ARP request to CE2.
#Reference:Huawei HCIE-Datacom Guide - EVPN BGP MAC/IP Advertisement and BUM Traffic Handling Real-World Application:
Data Center Interconnect (DCI):EVPN prevents excessiveARP floodingacross VXLAN networks.
Enterprise Campus Networks:UsesEVPN VXLAN to scale Layer 2 connectivity across multiple locations.
質問 # 49
As shown in figure, Clent1, C lent2 and Clent3 are simultaneously clients of RR1. Ri introduces 10 routes. It is assumed that the RGP is configured correctly. The neighbor relationship has been established, how many route entries exist in the BGP routing table of the most clIient3?
- A. 0
- B. 1
- C. 2
- D. 3
正解：A
質問 # 50
There is a concept of FEC-Forwarding Equivalence Class in MPLS, so what criteria can FEC not allocate based on?
- A. Destination Address
- B. Class of Service
- C. Application Protocol
- D. Fragment offset
正解：D
質問 # 51
What designs in the router can improve the reliability of the router?
- A. Dual-engine design
- B. Issu Design
- C. Module hot-swappable design
- D. Dual power supply design
正解：A、D
質問 # 52
Regarding the description of VRRP Fast Switching, the error is ?
- A. Use VRRP to monitor BFD sessions or EFM features, either in BPD sessions or EFM session states After the change, the VRRP module is notified to achieve fast VRRP switching
- B. A VRRP backup group cannot monitor Peer BFD, Link BFD, and Normal BFD
- C. at the same time If you configure to monitor multiple BFDs at the same time Then the various configurations are interrelated and may have an impact
- D. When a VRRP backup group monitors normal BFD, when the BFD state changes, the active-standby state is changed by modifying the backup group priority
正解：B、C
質問 # 53
When deploying BGP/MPLS IPVPN, OSPF's VPN route tag is not present
The extended properties of MP-BGP are passed only locally, only locally, and only meaningful on routers that receive MP-BGP routes and generate OSPF LSAs.
- A. FALSE
- B. TRUE
正解：B
質問 # 54
A VGMP packet is encapsulated with a UDP header and a VGMP header. By default, a VGMP packet uses UDP port _____.
正解：
解説：
512
Explanation:
Understanding VGMP (Virtual Gateway Management Protocol)
# What is VGMP?
* VGMP (Virtual Gateway Management Protocol) is used in Huawei firewalls to manage hot standby (HRP - Hot Standby Routing Protocol).
* Ensures that the active and standby firewalls synchronize their states for high availability.
# How Does VGMP Work?
* The Active and Standby firewalls exchange VGMP packets to maintain state synchronization.
* These packets are encapsulated within UDP for transport.
* The default UDP port for VGMP is 512.
Why is the Answer 512?
# Huawei firewalls use UDP port 512 by default for VGMP communication.# This ensures that VGMP heartbeats and synchronization messages are correctly processed.
Real-World Application:
* Enterprise Firewalls: VGMP ensures failover between active and standby firewalls.
* Carrier-Grade Firewalls: Uses VGMP with HRP to achieve zero-downtime firewall redundancy.
# Reference: Huawei HCIE-Datacom Guide - VGMP and HRP High Availability Mechanisms
質問 # 55
Router RL runs the OSPF protocol and uses the display ip routing-tabe command to view the router RL's routing table , the following information about OSPF in the routing table is described correctly as ?
- A. In the routing table, the routing table entries identified by the OSPF identifier can only be learned through the 3 types of LSAs to
- B. In the routing table, Route table entries identified with the "O_ASE identifier can only be learned through routing introduction
- C. In the routing table, used The 'OSPF' identifier identifies a route table entry that can only pass a Type 1 LSA
- D. In the routing table, the routing table entries identified with the 'OSPF identifier' can be learned through the 1/2/3/5 LSA to
正解：B
質問 # 56
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最新のH12-891_V1.0実際の無料試験問題は更新された276問あります：https://www.jpntest.com/shiken/H12-891_V1.0-mondaishu
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