A rogue device has connected to the network and has become the STP root bridge, which has caused a network availability issue.
Which two commands can protect against this problem? (Choose two.)
A. switch(config)#spanning-tree portfast bpduguard default
B. switch(config)#spanning-tree portfast bpdufilter default
C. switch(config-if)#spanning-tree portfast
D. switch(config-if)#spanning-tree portfast disable
E. switch(config-if)#switchport port-security violation protect
F. switch(config-if)#spanning-tree port-priority 0
