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Huawei H12-891_V1.0 exam is an advanced-level certification exam that validates the skills and expertise of professionals working with data communication technologies and solutions. HCIE-Datacom V1.0 certification exam is recognized globally and prepares individuals to become experts in designing, implementing, and maintaining data communication networks. Candidates who pass H12-891_V1.0 exam will have a deep understanding of the latest data communication technologies and industry best practices, making them highly sought after by employers around the world.
NEW QUESTION # 38
For the description of firewall security zones, the following statement is correct?
- A. Different security zones of the firewall, the priority can be the same
- B. The same interface of a firewall can belong to different security zones
- C. Different interfaces of the firewall can belong to the same security zone
- D. The built-in security zone of the Firewall can be deleted
Answer: C
NEW QUESTION # 39
Congestion management technology can be used to discard data packets in the buffer queue to prevent the buffer queue from being exhausted.
- A. FALSE
- B. TRUE
Answer: A
Explanation:
* Congestion Management (like WFQ, CBWFQ) controls traffic without discarding packets unless absolutely necessary.
* Congestion Avoidance (e.g., WRED) is responsible for selectively discarding packets to prevent buffer overflow.
* Key Distinction:
* Congestion Management = Traffic queuing and prioritization (no packet loss).
* Congestion Avoidance = Selectively dropping packets (e.g., WRED).
# Reference: Huawei HCIE-Datacom Guide - Congestion Management vs. Avoidance
NEW QUESTION # 40
In MPLSVPN, in order to distinguish between IPv4 prefixes that use the same address space, the RD value is added to the IPv4 address, and the following options are described correctly as ?
- A. RD is encapsulated in the Update message as an extended community attribute of BGP during delivery
- B. RD can be used to control the publication of VPN routing information
- C. After the PE receives an IPv4 route from CE, it adds an RD to the route to IPv4 that translates to a globally unique VPN-IPv4 route and publishes it on the public network
- D. On a PE device, each VPN instance corresponds to an RD value, and the RD value must be unique on the same PE device
Answer: D
NEW QUESTION # 41
Traditional BGP-4 can only manage IP4 unicast routing information, and MP-BGP extends BGP-4 to provide support for multiple network layer protocols. Among them, MP-BGP's support feature for IPv6 unicast networks is called BGP4+, BGP4+ via NextHop The route next hop address information is carried by the attribute.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION # 42
Man-in-the-middle attacks (MITM) or IP/MAC Spoofing attacks are common on intranets and can cause information leakage.
Which configuration method can prevent these attacks?
- A. Configure DHCP snooping to check the CHADDR field carried in a DHCP Request packet.
- B. Limit the maximum number of MAC addresses that can be learned on a switch interface.
- C. Configure association between DHCP snooping and IPSG or DAI on the switch.
- D. Configure the trusted or untrusted interface.
Answer: C
Explanation:
Comprehensive and Detailed Explanation:
# The Best Protection Against MITM and Spoofing Attacks:# (D) Associating DHCP Snooping with IPSG (IP Source Guard) and DAI (Dynamic ARP Inspection) provides complete protection by:
* Blocking rogue DHCP servers.
* Preventing MAC/IP spoofing.
* Ensuring only valid clients access the network.
# Why Not Other Options?# (A) Configuring trusted/untrusted interfaces only helps block rogue DHCP servers, but does not prevent spoofing.# (B) Limiting MAC address learning prevents MAC flooding, but does not stop MITM attacks.# (C) Checking the CHADDR field in DHCP Snooping helps detect spoofed requests, but does not block all MITM scenarios.
# Reference: Huawei HCIE Datacom - Security Mechanisms for Intranet Protection
NEW QUESTION # 43
What are the reasons why the BGP connection is down after it is successfully established ? ( Single choice questions) Single choice
- A. The wrong BGP packet was received.
- B. Open message negotiation failed.
- C. After the BGP connection is established, the keepalive message is not received within the negotiated holdtime time.
- D. The mandatory attribute in the route update packet is missing.
Answer: B
NEW QUESTION # 44
An SRv6 Policy can be either statically configured on a device or dynamically generated by the controller and then delivered to the device.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
Understanding SRv6 (Segment Routing over IPv6) Policies
#What is an SRv6 Policy?
Atraffic engineering (TE) mechanismused inSRv6-enabled networks.
Defines a set ofSegment Routing (SR) pathsthat direct packets through a predefined set of waypoints.
UsesSRv6 SIDs (Segment Identifiers)instead of MPLS labels.
#How Can SRv6 Policies Be Configured?
#Static SRv6 Policy Configuration:
Manually configured by network administrators.
Used inpredictable, fixed network paths.
#Dynamic SRv6 Policy Generation:
Created dynamically by anSDN controller(e.g.,Huawei iMaster NCE).
The controlleranalyzes network conditionsandadjusts paths automaticallybased 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:Usesdynamic SRv6 policiesfor optimal traffic distribution.
5G Transport Networks:UsesSRv6 TE for low-latency service guarantees.
#Reference:Huawei HCIE-Datacom Guide - SRv6 Policy and SDN Integration
NEW QUESTION # 45
Huawei CloudCampus Solution has multiple application scenarios, and iMaster NCE-Campus provides different APIs for each application scenario. Match the following application scenarios with the open APIs provided by iMaster NCE-Campus.
Answer:
Explanation:
Huawei iMaster NCE-Campus provides open APIs for seamless integration with third-party applications and services. Each API serves a specific purpose in managing network security, operations, analytics, and user interactions.
1. Authentication and authorization # Third-party authentication API
* This API is used to integrate third-party authentication systems, such as:
* LDAP (Lightweight Directory Access Protocol)
* RADIUS (Remote Authentication Dial-In User Service)
* OAuth/OpenID authentication
* It ensures secure user identity verification, access control, and single sign-on (SSO) in CloudCampus networks.
2. Network O&M # Infrastructure API
* The Infrastructure API provides tools for network monitoring, diagnostics, and automated management.
* It is used for:
* Device status monitoring
* Network topology visualization
* Fault detection and real-time alerts
* Performance optimization
3. LBS (Location-Based Services) # LBS API
* The LBS API enables applications to access location data collected by the network.
* It is used for:
* Tracking users or assets within a campus network
* Heatmap generation and movement analytics
* Geo-fencing and location-based policies
4. Crowd profiling # VAS API
* VAS (Value-Added Services) API is designed for advanced analytics and business intelligence.
* It supports:
* User behavior analytics
* Demographic profiling
* Marketing strategies based on network usage patterns
Reference from Huawei HCIE-Datacom Documentation:
* HCIE-Datacom Training Guide - CloudCampus Solution
* Huawei iMaster NCE-Campus API Documentation
* Huawei CloudCampus Solution Whitepaper - Open API and Use Cases
NEW QUESTION # 46
Which of the following technologies can be used to measure performance based on actual service traffic in Huawei's CloudWAN solution?
- A. TWAMP
- B. iFIT
- C. BGP FlowSpec
- D. Telemetry
Answer: B
Explanation:
Understanding Performance Measurement in Huawei CloudWAN
Huawei CloudWANenables intelligent traffic management,real-time network monitoring, and automated operations.
#Traditional Performance Monitoring Methods
TWAMP (Two-Way Active Measurement Protocol)# Measureslatency and jitterby injecting test traffic.
Telemetry# Providesreal-time network visibility, butdoes not measure actual service traffic performance.
BGP FlowSpec# Used forDDoS mitigation, not performance measurement.
#iFIT (In-situ Flow Information Telemetry)
#iFIT is a next-generation performance monitoring technologythat measures:
Real service traffic performance (latency, jitter, packet loss) in real time.
Packet forwarding behavior at each hop without injecting synthetic traffic.
Path delay and service degradation detection.
Why is Answer D Correct?
#iFIT provides real-time network performance monitoring based on actual service traffic.
#Unlike TWAMP, iFIT does not require probe packets, reducing overhead.
Real-World Application:
5G Transport Networks:Ensureslow-latency paths for ultra-reliable services.
CloudWAN Optimization:Detects network congestionwithout affecting user traffic.
#Reference:Huawei HCIE-Datacom Guide - iFIT and Intelligent Performance Monitoring
NEW QUESTION # 47
IS-IS supports the processing and computation of IPv6 routes by adding ATLPs to carry IPv6 addresses and reachability information.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION # 48
As shown in the figure, the neighbor relationship between R1 and R2 has just been established, and the database synchronization process between R1 and R2 is correct.
- A. R1 sends the packet of R2 as the CSNP packet. The message sent by
- B. R1 to R2 is the Hello message.
- C. R1 to R2 is an LSP packet. The message sent by
- D. The message sent by R1 to R2 is a PSNP message
Answer: A
NEW QUESTION # 49
When the load is an ICMPv6 message, what is the numeric value of the Next Header field in the IPv6 header if the presence of an extended header is not taken into account?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A,B,C
NEW QUESTION # 50
Which of the following messages does the BGP protocol support?
- A. Open
- B. Hello
- C. Update
- D. Keepalive
Answer: A,C,D
NEW QUESTION # 51
In the IS-IS broadcast network type, when establishing an adjacency relationship, if the router interface priority is set to 0, it will not participate in the dis election
- A. False
- B. True
Answer: A
NEW QUESTION # 52
Network managers can use CAR technology in traffic policing. What of the following technologies can be applied in CAR?
- A. Double barrel single speed
- B. Double barrel two-speed
- C. Three barrels of single quick
- D. Single barrel single speed
Answer: A,B
NEW QUESTION # 53
In addition to indicating priority, the DSCP value can also indicate the drop probability. Which of the following DSCP values is set with the highest drop probability?
- A. AF43
- B. AF12
- C. AF11
- D. AF10
Answer: A
Explanation:
Understanding DSCP & Assured Forwarding (AF) Classes
* DSCP (Differentiated Services Code Point) is used for QoS (Quality of Service) classification in IP packet headers.
* Assured Forwarding (AF) classes provide four traffic classes (AF1x, AF2x, AF3x, AF4x).
* Each AF class has three drop precedence levels (Low = 1, Medium = 2, High = 3).
A screenshot of a computer AI-generated content may be incorrect.
Analysis of Options:
* AF43 (Answer A) # Class 4, High Drop (Highest priority, highest drop probability) #
* AF10 (Answer B) # Class 1, Low Drop (Lowest priority, lowest drop probability) #
* AF12 (Answer C) # Class 1, Medium Drop Probability #
* AF11 (Answer D) # Class 1, Low Drop Probability #
Why AF43?
* Highest priority traffic within AF Class 4.
* Highest drop probability (x3) means packets are dropped first under congestion.
* Used for premium but non-essential services (e.g., bulk data transfer, backups).
# Reference: Huawei HCIE-Datacom Guide - QoS & DSCP Marking
NEW QUESTION # 54
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