Exhibit:
You work as a network engineer at Domain .com. You study the exhibit carefully. Which catalyst switch configuration would protect a customer network from possible disruption in the case in which an unauthorized switch is added to the network?
A.
Certkiller 1# show run
Hostname Certkiller 1
No spaning-tree optimize bpdu transmission
Spanning-tree extend system-id
Interface fastetethernet 0/1
Switchport mode access
B.
Certkiller 1# show run
Hostname Certkiller 1
No spaning-tree optimize bpdu transmission
Spanning-tree extend system-id
Interface fastetethernet 0/1
Switchport port-security violation restrict
C.
Certkiller 1# show run
Hostname Certkiller 1
Spanning-tree portfast bpduguard default
No spaning-tree optimize bpdu transmission
Spanning-tree extend system-id
Interface fastetethernet 0/1
Spanning-tree gurad root
D.
Certkiller 1# show run
Hostname Certkiller 1
No spaning-tree optimize bpdu transmission
Spanning-tree extend system-id
Interface fastetethernet 0/1
Switchport protected