which command enables root guard on a cisco switch?

exams 300-115 300-115 exam 0 Comments

which command enables root guard on a cisco switch?
A . switch(config-if)# spanning-tree guard root
B . switch(config)# spanning-tree guard root
C . switch(config-if)# spanning-tree guard-root
D . switch(config)# spanning-tree root guard
E . switch(config-if)# spanning-tree root guard

Answer: A