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802.1X Configuration on Cisco Switches – A Practical Lesson

In this lesson, I will explain how to configure, verify, and troubleshoot 802.1X port-based authentication on Cisco switches. This security feature is crucial for protecting network access at the port level, ensuring that only authenticated devices can connect to your network. Lesson Objectives After completing this lesson, you will

Implementing HSRP for High Availability: A Complete Guide for Network Engineers

Intro Recently, I witnessed a network administrator face every IT professional’s nightmare: a core router failure that brought down their payment processing system for 30 minutes. Standing there, watching thousands of transactions evaporate, I knew there had to be a better way. That’s when I dove deep into

Understanding VLAN Trunking: A Network Admin’s Guide to Cisco Trunks

Introduction Ever had to manage dozens of network segments in a single building? That’s exactly what Sarah, a network administrator at a growing tech startup, faced when her company expanded to three floors. VLANs and trunking became her best friends, and they might become yours, too. What is VLAN

Securing Your Network with Cisco Port Security: A Comprehensive Guide

Introduction Port security is a must-know for any network engineer, especially if you’re prepping for certifications like CCNA, CCNP, or CCIE. You’ve probably heard of it, but how confident are you in setting it up? This guide will give you everything you need, from basic concepts to a

Security Architecture: Protect Data at All Stages

Introduction Security architecture has become a critical framework for safeguarding sensitive information against cyber threats in today’s interconnected world. Understanding the different data states at rest, in transit, and use is essential for implementing robust protection strategies. Whether you’re a cybersecurity professional refining your approach or a business