Free Huawei H12-891_V1.0 Practice Exam with Questions & Answers | Set: 7

Understanding NETCONF < config > Operation Attributes

???? What is NETCONF?

NETCONF (Network Configuration Protocol) is an IETF-standardized protocol for network automation.

Uses XML-based configuration transactions with < config > operations.

???? Common NETCONF < config > Operation Attributes:

✅ A. create → Adds new data but fails if it already exists.

✅ B. delete → Removes the specified data from the configuration datastore.

✅ C. merge → Updates existing data or creates it if it does not exist.

❌ D. remove (Incorrect Choice)

NETCONF does not support remove as an operation.

delete is the correct operation for removing data.

Why is the Answer A, B, C?

✅ NETCONF supports create, delete, and merge, but NOT remove.

Real-World Application:

SDN Controllers & Network Automation: Uses NETCONF to configure devices dynamically.

Huawei iMaster NCE-WAN: Automates device onboarding and template-based configurations.

✅ Reference: Huawei HCIE-Datacom Guide – NETCONF Protocol and Configuration Operations

OSPF (Open Shortest Path First) Router-LSA (Type 1 LSA) describes all directly connected OSPF links of a router and their types. The following link types can appear in a Router-LSA:

Point-to-Point (P-2-P) (B) – Represents a direct connection between two routers.

Virtual Link (Vlink) (C) – Used to connect an area to the backbone (Area 0) when a direct connection is unavailable.

Stub Network (StubNet) (D) – Represents a network with only one exit point (e.g., a loopback interface or passive interface).

Incorrect Option:

TransNet (A) – Incorrect!

Transit networks appear in Network LSAs (Type 2), not Router LSAs.

Reference from Huawei HCIE-Datacom Documentation:

Huawei OSPF Configuration Guide – Router-LSAs and Link Types

HCIE-Datacom Training Material – OSPF LSAs and Topology Advertisement

Comprehensive and Detailed Explanation:

✔ The correct sequence of operations:

Download the file from remote device (/vrpcfg.cfg) → Store as C:\backup.cfg.

Upload the renamed file (backup.cfg) back to the remote device.

✔ Breaking Down the Correct Option (B):

✅ sftp.get( ' /vrpcfg.cfg ' , r ' C:\backup.cfg ' ) → Downloads vrpcfg.cfg from the remote device and renames it backup.cfg in C:\.

✅ sftp.put(r ' C:\backup.cfg ' , ' / ' ) → Uploads backup.cfg back to the remote device.

???? Reference: Huawei HCIE Datacom – Python SFTP File Transfer Using Paramiko

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:

1️⃣ iMaster NCE-Campus (Answer A - Core Role)

Manages network policies & user access.

Implements centralized policy control & orchestration.

2️⃣ 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.

3️⃣ 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

In Huawei’s CloudCampus Solution, when static IPsec VPN is used for WAN interconnection, the following devices are capable of acting as egress gateways for encrypted tunnels:

Access Point (AP)

Router

Switch

This is based on Huawei’s CloudCampus architecture, where all three device types can support VPN tunnel termination depending on the deployment size and use case.

Huawei Datacom Reference:

" In static IPsec VPN networking scenarios, egress devices can be APs, Routers, or Switches depending on the deployment model. This allows flexibility for small, medium, and large-scale branches. "

(Source: HCIE-Datacom V1.0 Training Guide – WAN Interconnection and VPN Chapter)

Understanding HTTP/1.1 Response Structure

???? What is an HTTP Response?

The response is sent from the server to the client after processing an HTTP request.

The structure follows a standardized format:

Elements of an HTTP/1.1 Response:

✅ A. Status Line → Contains protocol version, status code, and reason phrase.

✅ B. Response Body → Contains HTML, JSON, XML, or other content.

✅ C. Response Header → Provides metadata about the response (e.g., Content-Type, Server).

✅ D. Empty Line → A blank line separates headers from the response body.

Example of an HTTP/1.1 Response:

HTTP/1.1 200 OK

Date: Sat, 08 Mar 2025 14:00:00 GMT

Server: Apache/2.4.41 (Ubuntu)

Content-Type: text/html; charset=UTF-8

< html >

< body >

< h1 > Welcome to Huawei Datacom < /h1 >

< /body >

< /html >

Why is the Answer A, B, C, D?

✅ An HTTP response includes a status line, headers, an empty line, and a response body.

Real-World Application:

Web Application Debugging: Helps developers analyze server responses.

API Security: Validates response headers to prevent injection attacks.

✅ Reference: Huawei HCIE-Datacom Guide – HTTP Protocol and Response Headers

Comprehensive and Detailed In-Depth Explanation:

The iMaster NCE-IP controller uses Telemetry to collect real-time device running status information efficiently and with low latency.

Telemetry (A): Enables continuous data streaming to the controller, including network performance and link state information.

Telnet (B): Used for manual device management and not suitable for automated data collection.

BGP-LS (C): Used for distributing link-state information, but not for real-time performance data collection.

IS-IS (D): An IGP protocol, not used for collecting device status.

Comprehensive and Detailed In-Depth Explanation:

Telemetry in a narrow sense refers specifically to the device-side telemetry process, which includes the following key modules:

Data generation (A): The device collects and generates telemetry data, such as performance metrics or operational statistics.

Data push (B): The device actively pushes the collected data to the configured destination (such as a collector or management system) using a data streaming protocol.

Data source (C): The entity on the device that generates or provides the monitored data.

Data subscription (D) is not part of the device-side telemetry; it is related to the management system side, where users subscribe to specific telemetry data streams.

Therefore, the correct answers are A, B, C.

6PE (IPv6 Provider Edge over MPLS) vs. 6VPE (IPv6 VPN Provider Edge over MPLS VPNs)

6PE (IPv6 over MPLS without VPNs):

Uses global IPv6 routing over MPLS.

No VPN instances (VRFs) are created on PEs.

IPv6 addresses cannot be reused across different CEs because all traffic is routed using a single global table.

6VPE (IPv6 over MPLS with VPNs):

Uses MPLS VPN (VRF instances) to provide IPv6 VPN services.

VPN instances (VRFs) are created on PEs to separate customer networks.

IPv6 addresses of CEs can be reused in different VPN instances because each VRF maintains separate routing tables.

Correct Answer Explanation:

✅ C. In 6VPE networking, IPv6 addresses of a CE can be reused.

Since each VPN instance (VRF) maintains its own IPv6 routing table, IPv6 addresses of CEs can be reused across different VPNs.

Incorrect Answer Explanations:

❌ A. In 6PE networking, VPN instances need to be created on PEs.

Wrong! 6PE does not use VPN instances (VRFs); it relies on a global IPv6 routing table.

❌ B. In 6PE networking, IPv6 addresses of a CE can be reused.

Wrong! Since 6PE uses a single IPv6 global routing table, IPv6 addresses cannot be reused.

❌ D. In 6VPE networking, no VPN instance needs to be created on PEs.

Wrong! 6VPE requires VPN instances (VRFs) on PEs to separate customer traffic.

Reference from Huawei HCIE-Datacom Documentation:

Huawei MPLS VPN Configuration Guide – 6PE and 6VPE Deployment

HCIE-Datacom Training Material – IPv6 MPLS Solutions