ENG
MGT
PRD
BUS
ENG
MGT
PRD
BUS
BUS
BUS
ENG
ENG
PRD
PRD
MGT
MGT
VLAN 100
VLAN 200
VLAN 300
VLAN 400
So you successfully VLANed your Building by Department with 1 switch
Occasionally they are going to need to talk to each other, How do you do that?
How does a regular LAN talk to another LAN? Use the same method.