esercizio 4 Published October 10, 2015March 30, 2016 by Franco Corapi http://computhttp://computernetworkingnotes.com/switching-vlan-stp-vtp-dtp-ether-channels/switch-port-security.htmlernetworkingnotes.com/switching-vlan-stp-vtp-dtp-ether-channels/switch-port-security.html