I just released a new videos which teaches VLANs in the absolute simplest way. This is how I wish VLANs were taught to me when I first started my Networking journey. I have since taught countless students using this format, and the reception has been unanimously positive. Now I’m sharing that method with my readers!
What are VLANs - Youtube video from Practical Networking .net
The video discusses through the following concepts: ccna voice
VLANs provide two major functions:
Break up physical switches into virtual “mini switches“
Extend the virtual “mini switch” to multiple physical switches
VLANs allow your Logical topology to be unconstrained by your Physical topology
Access Ports / Untagged Ports – ports which carry traffic for only ONE VLAN
Trunk Ports / Tagged Ports – ports which carry traffic for MULTIPLE VLANs
All frames traversing a Trunk port must be “tagged” so the receiving switch knows what VLAN to associate that traffic to
802.1q – open standard for how to tag Layer 2 frames
Native VLAN – The one VLAN which traverses a Trunk/Tagged link without a VLAN tag
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