On what switch ports should BPDU guard be enabled to enhance STP stability?

IT Questions BankCategory: CCNA SecurityOn what switch ports should BPDU guard be enabled to enhance STP stability?

Question:
On what switch ports should BPDU guard be enabled to enhance STP stability?

  • all PortFast-enabled ports
  • only ports that are elected as designated ports
  • only ports that attach to a neighboring switch
  • all trunk ports that are not root ports

Explanation: End-user ports should connect only to end-user devices and not to other switches. To prevent a switch from being added to the network on an end-user port, BPDU guard will immediately put the port into the error disabled state if a BPDU is received on that port. However, if PortFast is not configured on an end-user port, BPDU guard is not activated on that port.

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