某公司下设3个部门，为了便于管理，每个部门组成一个VLAN，公司网络结构如图1所示。
[交换机Switch1的部分配置信息]
Switch1(config)tinterface fO/9
Switch1(config-if)switchport mode access
Switch1(config-if)switchport access vlan 11
Switch1(config)interface fO/10
Switch1(config-if)switchport mode access
Switch1(config-if)switchport access vlan 12
Switch1(config)interface fO/17
Switch1(config-if)switchport mode access
Switch1(config-if)switchport access vlan 13
[交换机Switch2的部分配置信息]
Switch2(config)interface fO/6
Switch2(config-if)switchport mode access
Switch2(config-if)switchport access vlan 11
Switch2(config)interface fO/8
Switch2(config-if)switchport modeaccess
Switch2(config-if)switchport access vlan 12
Switch2(config)interface fO/11
Switch2(config-if)switchport mode access
Switch2(config-if)SWitchport access vlan 13
[交换机Switch3的部分配置信息]
Switch3(config)interface fO/3
Switch3(config-if)switchport mode access
Switch3(config-if)switchport access vlan 11
Switch3(config-if)exit
Switch3(config)interface fO/7
Switch3(config-if)switchport mode access
Switch3(config-if)switchport access vlan 12
Switch3(config)interface fO/13
Switch3(config-if)switchport mode access
Switch3(config-if)switchport aocess vlan 13
划分VLAN有哪几种划分方式?