MSflex1, You have multiple switches. You trunked the switches. You defined the trunk to be an 802.1q trunk. The 802.1q is the encapsulation type for the trunk. You will assign vlans to the trunk. The trunk will flow the vlans from switch1 to switch2. When a topology change occurs, a VTP update will keep both switches in sync. What vlan tagging will do for you is that frame that is transmitted over the trunk is “tagged” with a vlan number.