DTP (Dynamic Trunking Protocol): How It Works and Why You Should Disable It
DTP lets switches negotiate trunk formation automatically—but this convenience comes with security risks that make disabling it a best practice in production networks.
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VTP Configuration on Cisco Switches: Versions 1, 2, and 3
VTP automates VLAN propagation across switches—but a single switch with a high revision number can wipe all VLANs from your network. Learn how to configure VTPv3, manage revision numbers, and avoid the most dangerous VLAN mistake.
Configuring SVIs (Switch Virtual Interfaces) for Inter-VLAN Routing
SVIs (Switch Virtual Interfaces) are logical VLAN interfaces that enable a Layer 3 switch to route between VLANs and provide management access. Master SVI creation, IP routing enablement, and troubleshooting SVI states.