200-301 Question #317: Real Exam Question with Answer & Explanation

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

Submitted by lukas.cz· Mar 5, 2026Network Access

Question

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

Options

ABPDUfilter
BPortFast
CBackbonefast
DBPDUguard

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.

Topics

#STP PortFast#Spanning Tree Protocol

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