In the VLAN video of CCNA, you mention that only 1 VLAN can only be associated with 1 given port / interface, but you can get around that by doing a DATA VLAN and a VOICE VLAN.
Am I missing something here? From past IT experience, and our current configuration at work, we have numerous access port interfaces that share multiple VLANs. To give you an example, we have a Hyper-V environment where we use the default VLAN 1 for our internal network and we have VLAN 50 for our 2nd domain for the Hyper-V hosts.
This way, we have a untagged VLAN 1, and tagged VLAN 50 on a single port. But if I would want to, I could add yet another tagged VLAN # on the same port / interface. Bear in mind we are currently using HPE ProCurve Switches, but this has to be possible on the CISCO side too besides for the trunk ports.
Can you explain this in more detail?