A question about BPDU. What would a PortFast BPDU guard port do when it is configured on a port? (Choose two)

Questions BankA question about BPDU. What would a PortFast BPDU guard port do when it is configured on a port? (Choose two)
A question about BPDU. What would a PortFast BPDU guard port do when it is configured on a port? (Choose two) 1ITExamAnswers Staff asked 6 months ago
Question:
A question about BPDU. What would a PortFast BPDU guard port do when it is configured on a port? (Choose two)

  • err-disabled when port receives BPDUs
  • supported only on nontrunking access ports
  • forward when port receives BPDUs
  • supported on trunk ports

Explanation: PortFast BPDU guard prevents loops by moving a nontrunking port into an errdisable state when a BPDU is received on that port. When you enable BPDU guard on the switch, spanning tree shuts down PortFast-configured interfaces that receive BPDUs instead of putting them into the spanning tree blocking state. In a valid configuration, PortFast-configured interfaces do not receive BPDUs. If a PortFast-configured interface receives a BPDU, an invalid configuration exists. BPDU guard provides a secure response to invalid configurations because the administrator must manually put the interface back in service.

Reference: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4000/8-2glx/configuration/guide/stp_enha.html

More Questions: CCNA v3.0 (200-125) Study Guide – Exam Dumps


Related Articles