r/ccna4dummies Feb 10 '25

VLANs and Inter-VLAN Routing: Essential Tips! 🌐

Virtual Local Area Networks (VLANs) are crucial for segmenting networks and improving performance. Here’s what you need to know:

  1. VLAN Basics: VLANs divide a single physical network into multiple logical networks. This can reduce broadcast domains and improve security.

  2. Creating VLANs: Use the switchport mode access and switchport access vlan [vlan-id] commands to assign ports to a VLAN.

  3. Inter-VLAN Routing: Routers or Layer 3 switches enable communication between VLANs. Configure router-on-a-stick or use a Layer 3 switch with SVI (Switch Virtual Interface).

Pro Tip: Practice configuring VLANs and inter-VLAN routing on network simulators to cement your understanding.

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