Networks, Cables, OSI, and TCP Models
CSMA/CD, Switching, and VLANs
Trunking, DTP, and Inter-VLAN Routing
Router and Switch Security
Network Address Translation
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A trunk is a switch port that can carry multiple traffic types, each tagged with a unique VLAN ID. As data is switched across the trunk port or trunk link, it is tagged (or coloured) by the egress switch trunk port, which allows the receiving switch to identify that it belongs to a particular VLAN.