14.9.11 Packet Tracer - Layer 2 Vlan Security Access

Port Security.

Let’s break down what this lab teaches and why it matters in the real world. Imagine you are responsible for a corporate network. Users are in VLAN 10 (Employees) and VLAN 20 (Guests). The lab presents a simple topology: one multilayer switch (distribution), one layer 2 switch (access), and a few PCs. 14.9.11 packet tracer - layer 2 vlan security

In the world of networking, we often talk about firewalls, ACLs, and encryption. But what happens if an attacker simply unplugs a legitimate user’s laptop and plugs in a rogue device? What if they spoof a VLAN or launch a MAC flood? Port Security

On any port that should not be a trunk (i.e., all end-user ports), explicitly turn off trunking: Users are in VLAN 10 (Employees) and VLAN 20 (Guests)

Move the native VLAN to an unused, "dead-end" VLAN.