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  1. Home
  2. Huawei Certification
  3. H12-891_V1.0 Exam
  4. Huawei.H12-891_V1.0.v2026-06-05.q295 Dumps
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Question 246

Huawei Open Programmability System (OPS)usesstandard HTTP methodsto accessmanaged objectsand manage network devices.
Which of the followingHTTP methodsis used toconfigure the value of a network device's managed object?

Correct Answer: D
Comprehensive and Detailed Explanation:
#Huawei OPS (Open Programmability System)followsRESTful API principles, usingHTTP methodsfor device management.
#HTTP Methods Used in OPS:
#GET# Retrieves data from the device.
#POST# Creates new data/configurations.
#PUT# Replacesentire configuration objects.
#PATCH#Updates specific fieldsof a configuration object.#(Correct Answer) SincePATCH is used for modifying specific values in managed objects, the correct answer isD.
#Reference:Huawei HCIE Datacom - RESTful API Operations in Huawei OPS
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Question 247

Which of the following is the drop probability of packets exceeding the upper threshold in WRED?

Correct Answer: C
WRED (Weighted Random Early Detection) helps prevent congestion by randomly discarding packets before buffers are full.
Drop Probability Behavior:
Below lower threshold = 0% drop (packets pass normally).
Between lower & upper threshold = Progressively increasing drop probability.
Above upper threshold = 100% drop (probability = 1).
✅ Reference: Huawei HCIE-Datacom Guide - WRED Mechanism
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Question 248

Which of the following roles is NOT a core role in Huawei's Free Mobility solution?

Correct Answer: C
Understanding Huawei's Free Mobility Solution
Huawei's Free Mobility solution is designed to ensure that users can seamlessly access the network regardless of their physical location while maintaining consistent policies.
# Key Components in Free Mobility Solution:1## iMaster NCE-Campus (Answer A - Core Role)
* Manages network policies & user access.
* Implements centralized policy control & orchestration.
2## Policy Enforcement Device (Answer B - Core Role)
* Ensures that user policies (such as QoS, security, VLANs) are applied dynamically.
* Typically a switch or gateway enforcing access control.
3## Policy Control Device (Answer D - Core Role)
* Stores and dynamically assigns policies based on user role & device type.
* Works closely with iMaster NCE-Campus.
# Why is C (Authentication Device) NOT a Core Role?# Authentication devices (such as a RADIUS or AAA server) are not a core component of Huawei's Free Mobility solution.
* They are part of the broader network security framework but not mandatory for Free Mobility.
Real-World Application:
* Used in enterprise & campus networks where employees, guests, and IoT devices need seamless access while maintaining security policies.
# Reference: Huawei HCIE-Datacom Guide - Free Mobility Architecture & Policy Management
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Question 249

ICMPv6 has two types: Error Messages and Information Messages.

Correct Answer: B
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Question 250

HTTP is an application layer protocol for distributed, collaborative, and hypermedia information systems.

Correct Answer: A
✅ Hypertext Transfer Protocol (HTTP) is an application-layer protocol used for:
Accessing web pages and hypermedia content.
Client-server communication over the internet.
Stateless communication with request-response architecture.
Key Features of HTTP:
Application Layer Protocol in the TCP/IP model.
Uses TCP (Port 80) and HTTPS (Port 443) for secure communication.
Supports REST APIs, web applications, and cloud services.
Reference from Huawei HCIE-Datacom Documentation:
Huawei Network Protocol Guide - HTTP and Web Services
HCIE-Datacom Study Material - Application Layer Protocols in TCP/IP Model
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