哪条命令可用于仅从交换机上删除 VLAN 20？（）A:delete flash:vlan.dat B:no switchport access vlan 20 C:delete vlan.dat D:no vlan 20 答案: no vlan 20

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哪条命令可用于仅从交换机上删除 VLAN 20？（ ）A:delete flash:vlan.dat B:no switchport access vlan 20 C:delete vlan.dat D:no vlan 20 答案: no vlan 20