Refer to the exhibit. Users complain that they intermittently lose data and connections to important servers. After investigation, you discover that the 802.1Q trunk between Certkiller 1 and Certkiller 3 is down. Even though the HSRP group 11 is being serviced by Certkiller 2, you discover that the SVI for VLAN 11 is in the up state on Certkiller 1. Which three Cisco Catalyst IOS commands should you use on Certkiller 1 to find the source of this problem? (Choose three.)
A.
show interfaces mod/port trunk
B.
show vtp status
C.
show standby vlan 11 brief
D.
show interfaces vlan 11
E.
show spanning-tree vlan 11