[问题4] 阅读下面的配置信息，解释(6)处的命令。 Switeh#vlanSwitch(vlan)#vlan 2 (创建一个VLAN2) VLAN 2 added: Name:VLAN0002 (系统自动命名) Switch(vlan)#vlan 3 name vlan3 {{U}} (6) {{/U}} VLAN 3 added: Name:vlan3 Switch(vlan)#exit