VLANs (Virtual Local Area Network) are virtualization in our LANs segments, for example:   We have one switch with 24 ports, if we created 2 vlans, 10 and 20, and ADD ports 1 to 12 in vlan 10 and ports 13 to 24 in vlan 20 ...   After this moment, we have 2 logical switches, it one with 12 ports, one of then in ports 1 to 12 and other in ports 13 to 24, because in this scenario one PC in port 7 don't communicate with other pc in port 20, in our case.     In this ilustration below, one scenario without VLANs...       In this ilustration below, one scenario with VLANs implementeded...       Regards Douglas Rodrigues           ... View more