200-301: Cisco Certified Network AssociateDemo

By Cisco · Question Mode

QuestionQ1143

Network Access

What is the primary effect of the spanning-tree portfast command?

  • A It immediately enables the port in the listening state.
  • B It immediately puts the port into the forwarding state when the switch is reloaded.
  • C It enables BPDU messages.
  • D It minimizes spanning-tree convergence time.
Explanation

spanning-tree portfast causes an edge port to skip the normal spanning-tree listening and learning delays and transition to forwarding immediately when the link comes up. Its main purpose is to reduce the startup delay experienced on access ports, thereby minimizing spanning-tree convergence time for connected end devices.

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