我也对这个TT9有疑问,Question3 题库的答案是B,In Configuration mode, using the interface port-channel 13, port-channel 23, add switchport trunk allowed vlan 10,200 commands,and then no, R8 T3 k' g2 B7 X! l
shutdown interface fa1/0/1,而switchport trunk allowed vlan这个命令是覆盖的,就会把vlan 20从这个trunk去掉,正确答案应该是D?