2.1.c Implement and Troubleshoot VLAN

Section 2.1.c Implement and Troubleshoot VLAN

 

We cannot discuss VLANs until we learn the dot1q tag in depth.

 

The dot1q header comes before the ethertype field in ethernet.

It is a 4 byte value used to denote these 3 fields:
802.1P (class of service/layer 2 qos)
DEI: Drop eligible indicator
ID: vlan membership