Hello everyone, I’d like to understand how do VLAN tags work. I am a kid starting my IT journey in my first job and I found out about VLAN tags but I have no idea what they do. What is the difference between tagged and untagged? Looking forward to your replies 😊
EDIT: Thank you guys so much for all your replies. I’ve read all of them and now I get it ❤️
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Without tags, VLANs are entirely based on physical Ethernet ports. Switches can assign a different VLAN to each port. If a computer wants to be on more than one untagged VLAN, it needs more than one Ethernet port. Each physical Ethernet port has just the one untagged VLAN.
Tags are just an extra value in the Ethernet packet header, outside the IP packet. Tagged packets allow multiple VLANs to go through a single Ethernet port on either a switch or a computer. Packets with no tag belong to the VLAN assigned to the physical port.
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