I built a network in the lab with multiple PCs and switches and everything pings fine without VLANs. So why bother? What real problem do VLANs solve? My instructor says they're essential but I don't see why when the flat network already works.
I'm studying VLANs and I understand what a VLAN is, but the difference between trunk and access ports confuses me. When do I use each one? And what's this native VLAN thing? Why does it matter? A plain English explanation would be amazing.
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