Cisco

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

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