VLANs and Trunking Explained with 802.1Q Tagging and Native VLAN Security - Network+ N10-009

VLANs and trunking explained step by step for the CompTIA Network+ N10-009 exam. This video breaks down why VLANs exist, the difference between access ports and trunk ports, the anatomy of an 802.1Q tag (TPID, 12-bit VLAN ID, priority bits), the native VLAN gotcha and the double-tagging VLAN hopping attack, voice VLAN and why it is the one exception to the one-VLAN-per-access-port rule, inter-VLAN routing with router-on-a-stick versus a Layer 3 switch using SVIs, and the reserved VLAN ranges (0, 1, 1002-1005, 4095) you need to recognize on exam day.

This is part of the full CompTIA Network+ N10-009 playlist covering every exam objective from Domain 1 networking fundamentals through Domain 5 troubleshooting. The next video in the playlist moves on to Spanning Tree Protocol and why Layer 2 loops bring down entire networks.

Timestamps, chapters, and music credits are added automatically below.

▶ Watch next: Wireless Security WPA2, WPA3, and Enterprise Authentication - Network+ N10-009 https://www.youtube.com/watch?v=ScwNY2VYiZ0