In my networking classes, we have always discussed reasons why you would want to TAG any switchports. We also discussed the difference between Access and Trunk ports. I'm sure this is extremely simple, but reviewing VLAN info on switch recently, the previous tech specifically went under VLAN 2 , let's say and defined which ports that were untagged.
In my head, you either applied the VLAN to specific ports or you didn't. I'm a little confused why you would create a VLAN, then specify which ports you wouldn't tag. I really feel like i'm missing something here.
"untagged ethe 1/1/2 to 1/1/5" as an example.
Can anyone elaborate?