Huawei Updated H12-811_V1.0 Exam Questions and Answers by bianca

Comprehensive and Detailed Explanation:

RADIUS (Remote Authentication Dial-In User Service) is a widely used AAA protocol for:

Authentication (verifying user credentials).

Authorization (determining access level).

Accounting (logging user activity).

It uses UDP (ports 1812/1813 or 1645/1646) and is common in enterprise networks.

✅ Reference: HCIA-Datacom Security Guide – AAA & RADIUS Overview

The telnetlib module in Python provides functions to interact with Telnet servers, allowing Python scripts to automate Telnet sessions. This module is widely used in network automation and scripting tasks, where Telnet is used to access and manage network devices remotely​.

Detailed Explanation:RSTP (Rapid Spanning Tree Protocol) employs a synchronization mechanism with the proposal/agreement handshakes to prevent loops during topology changes. By synchronizing states between switches, RSTP avoids temporary loops while quickly transitioning ports to the forwarding state. (Reference: HCIA-Datacom Training Material, RSTP Mechanisms and Synchronization)

Detailed Explanation:The ACL (Access Control List) configuration only permits IP address 172.16.105.2. By applying this ACL to the Telnet server, only devices from this IP can establish a Telnet connection, while all others are denied access. (Reference: HCIA-Datacom Training Material, ACLs and Telnet Access Control)