VLANs in Depth - Access Ports, Trunks, and Native VLANs Explained
Hello all,
It's time to dive back into network architecture fundamentals! Between balancing work tasks and setting up lab scenarios in Packet Tracer, I've been spending a ton of time working through the Cisco CCNA 200-301 domains. As I study and lab out these concepts, I want to document what I'm learning, breaking down core networking concepts into practical, hands-on guides.
Let's kick things off with one of the absolute bedrock building blocks of enterprise switching: Virtual Local Area Networks (VLANs).
Mastering VLANs is easily one of the most critical milestones for anyone studying for the CCNA or managing campus networks. It isn't just about memorizing CLI command syntax; it's about deeply understanding how Ethernet frames are tagged, how switches handle traffic across trunk links, and how to write clean configuration lines that prevent network loops and security vulnerabilities.