Which three commands can be used to harden a switch? (Choose three.)
A.
switch(config-if)# spanning-tree bpdufilter enable
B.
switch(config)# ip dhcp snooping
C.
switch(config)# errdisable recovery interval 900
D.
switch(config-if)# spanning-tree guard root
E.
switch(config-if)# spanning-tree bpduguard disable
F.
switch(config-if)# no cdp enable