As I understand it (and that is questionable):
This pertains to Cisco equipment.
1-Switch traffic on a port, configured in access mode with a static VLAN, is tagged with a VLAN field before being sent out the trunk port?
2-Control traffic is untagged. Untagged frames are "tagged" with the PVID of the Native VLAN?
3-The purpose of trunking is to allow multiple VLAN traffic across the same link?
4-The native VLAN is for legacy or untagged LAN traffic. The purpose is to allow any untagged traffic or traffic not associated with a VLAN to use the trunk link and still communicate with the network?
Is that right?