Tag
vlan
- Aug 26, 2026 VLAN Segmentation and the Limits of Layer 2 Isolation How 802.1Q tags create separate broadcast domains on shared hardware, why trunk links and layer 3 boundaries decide whether isolation holds, and where VLAN hopping attacks get their leverage. security
- Sep 2, 2023 802.1Q Tagging and the Four-Byte Insertion Where the VLAN tag sits in a frame, what PCP and DEI carry, how untagged and priority-tagged frames are told apart, and what a trunk port must do. networking