Huawei Updated H12-891_V1.0 Exam Questions and Answers by millicent

Comprehensive and Detailed In-Depth Explanation:

MACsec (Media Access Control Security)is a security protocol that provides securecommunication over Ethernet links. It operates at the MAC layer (Layer 2) and offers the following key security services:

Integrity Check (B):Ensures that data has not been tampered with during transmission.

User Data Encryption (C):Protects data confidentiality by encrypting the payload.

Data Source Authenticity Verification (D):Confirms that the data originates from a legitimate source by using security associations.

Controllability Check (A)is not a service provided by MACsec. The term "controllability" typically relates to network management and configuration control rather than data security. MACsec primarily focuses on protecting data integrity, confidentiality, and authenticity, rather than controlling network elements or configurations.

Understanding Jinja2 Templates in Huawei SSP Packages

????What is Jinja2?

Jinja2 is atemplating engineused inHuawei SSP (Smart Script Package) automation.

It allowsdynamic configuration generationbased on variables and logic.

????Jinja2 Syntax Basics:

✅{% ... %}→ Used forcontrol structureslike loops and conditions.

✅{{ ... }}→ Used forvariable placeholders.

Example of a Jinja2 Template Using {% ... %} for a Loop:

{% for interface in interfaces %}

interface {{ interface.name }}

description {{ interface.description }}

{% endfor %}

????This template dynamically generates interface configurationsbased on a list of interfaces.

Why is the Answer TRUE?

✅{% ... %} is used for control structures in Jinja2 templates(e.g., loops, if-else statements).

✅Jinja2 templates are widely used in SSP for Huawei network automation.

Real-World Application:

Automated Network Configuration:Uses Jinja2 inHuawei SSP automation scripts.

Data Center & SDN Automation:Dynamically generatesVXLAN, BGP, and OSPF configurations.

✅Reference:Huawei HCIE-Datacom Guide – Jinja2 Templates in SSP Packages

Huawei’sNetwork Access Control (NAC)Portal authentication supports various identity authentication methods for user login via a web page. These include:

Username and password— standard method.

Passcode— one-time password or PIN.

SMS verification code— users receive a dynamic code via SMS for identity verification.

However:

MAC addressauthentication is used inMAC-based authentication, not Portal. MAC authentication allows a device to be authenticated using its MAC address without user interaction (i.e., not via a Portal page).

Correct answer: D. User’s MAC address