An engineer need to implement a solution that prevents loops from occurring accidentally by connecting a switch to interface Ethernet1/1. The port is designated to be used for host connectivity. Which configuration should be implemented?
A. switch# configure terminal switch(config)# interface Ethernet1/1 switch(config-if)# spanning-tree bpduguard enable
B. switch# configure terminal switch(config)# interface Ethernet1/1 switch(config-if)# spanning-tree guard loop
C. switch# configure terminal switch(config)# interface Ethernet1/1 switch(config-if)# spanning-tree loopguard default
D. switch# configure terminal switch(config)# interface Ethernet1/1 switch(config-if)# spanning-tree bpdufilter enable
