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Barracuda Web Application Firewall

VLAN tagging

  • Also known as: Virtual Local Area Network

Method to help identify packets travelling through trunk links. When an Ethernet frame traverses a trunk link, a special VLAN tag is added to the frame and sent across the trunk link. As it arrives at the end of the trunk link, the tag is removed and the frame is sent to the correct access link port according to the switch’s table, so the receiving end is unaware of any VLAN information.