200-301 · Question #317
Which spanning-tree enhancement avoids the learning and listening states and immediately places ports in the forwarding state?
The correct answer is 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
Question
Which spanning-tree enhancement avoids the learning and listening states and immediately places ports in the forwarding state?
Options
- ABPDUfilter
- BPortFast
- CBackbonefast
- DBPDUguard
How the community answered
(22 responses)- B95% (21)
- C5% (1)
Explanation
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.
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