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Which spanning-tree enhancement avoids the learning and listening states and immediately places ports in the forwarding state?
Correct Answer: B
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/