Question

You've enabled Port-Fast on interface F0/1. What command would you enter to enable BPDU Guard in interface configuration mode?

a) spanning-tree portfast bpduguard
b) spanning-tree bpduguard enable
c) spanning-tree portfast bpdu-guard enable
d) spanning-tree bpdu-guard enable

Answer 1

The correct command to enable BPDU Guard in interface configuration mode is 'spanning-tree bpduguard enable'.

Step-by-step explanation:

To enable BPDU Guard for an interface on a network switch after enabling Port-Fast on that interface. In interface configuration mode, the correct command to enable BPDU Guard on an interface that has already had Port-Fast enabled is:

1. spanning-tree bpduguard enable

This command applies the BPDU Guard feature to the interface to protect against potential loop issues that may arise if a network switch is connected to the port, which may then send Bridge Protocol Data Units (BPDUs).