1.2 Virtual LANs
1.2.5 Port-Centric virtual LANs
VLAN membership by port maximizes forwarding performance because:
  • Users are assigned by port 
  • VLANs are easily administered 
  • Security between VLANs is maximized 
  • Packets do not "leak" into other domains 
  • VLANs and VLAN membership are easily controlled across network