Which spanning-tree enhancement avoids the learning and listening states and immediately places ports in the forwarding state?

Which spanning-tree enhancement avoids the learning and listening states and immediately places ports in the forwarding state?
A . BPDUfilter
B . PortFast
C . Backbonefast
D . BPDUguard

View Answer

Answer: B

Explanation:

PortFast

Spanning Tree Portfast causes layer 2 switch interfaces to enter forwarding state immediately, bypassing the listening and learning states. It should be used on ports connected directly to end hosts like servers or workstations. Note: If portfast isn’t enabled, DHCP timeouts can occur while STP converges, causing more problems.

https://skminhaj.wordpress.com/2015/03/04/spanning-tree-stp-rstp-mst-enhancements/