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200-301 · Question #1517

Which Rapid PVST+ feature should be configured on a switch port to immediately send traffic to a connected server as soon as it is active?

The correct answer is A. portfast. To enable a switch port connected to a server to immediately enter the forwarding state, bypassing standard STP delays, the portfast feature should be configured.

Submitted by daniela_cl· Mar 5, 2026Network Access

Question

Which Rapid PVST+ feature should be configured on a switch port to immediately send traffic to a connected server as soon as it is active?

Options

  • Aportfast
  • Buplinkfast
  • CBPDU guard
  • Dloop guard

How the community answered

(53 responses)
  • A
    92% (49)
  • B
    4% (2)
  • C
    2% (1)
  • D
    2% (1)

Why each option

To enable a switch port connected to a server to immediately enter the forwarding state, bypassing standard STP delays, the portfast feature should be configured.

AportfastCorrect

PortFast immediately transitions a switch port to the forwarding state upon activation, skipping the Spanning Tree Protocol (STP) listening and learning states, which significantly reduces the time for an end device like a server to become active on the network.

Buplinkfast

UplinkFast is an STP convergence feature designed for switches with redundant links to an upstream device, not for speeding up end-device connectivity.

CBPDU guard

BPDU guard is a security feature that shuts down a port if it receives a Bridge Protocol Data Unit (BPDU), preventing unauthorized switches from affecting the STP topology.

Dloop guard

Loop guard is an STP feature that puts a port into a loop-inconsistent state if BPDUs are no longer received, helping to prevent potential forwarding loops.

Concept tested: Rapid PVST+ PortFast feature

Source: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3560/software/release/12-2_52_se/configuration/guide/swstp.html#wp1074550

Topics

#Rapid PVST+#PortFast#Spanning Tree Protocol#STP optimization

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