Electing the root Only one switch can be the root bridge. From the start all switches announce themselves as the root, when a switch hears of a superior BPDU it stops announcing itself as the root and instead forwards the
VLAN – Notes
Private VLANs Commonly used in SP networks to put users in common subnet but no direct forwarding of packets between customers in same VLAN. Enforce security by forcing traffic to go through router instead of switched locally. There are three