在如上图所示的交换网络中,三台交换机都只有缺省 VLAN1, 三台交换机的互联端口都为 Trunk, 且允许所有 VLAN 通过,三台交换机都开启了全局和端口的 GVRP 功能在交换机 SWA 上创建了 VLAN10, 在交换机 SWC 上创建了 VLAN20, 并且在交换机 SWA 上设置 Ethernetl/0/1 端口的 GVRP 注册模式为 Forbidden, 在三台交换机上査看各 Trunk 端口状下面显示正确的是 ( 选择一项或多项)
A.
[SWA]display interface Ethernet 1/0/1 Ethernet1/0/1 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
B.
[SWB]display interface Ethernet 1/0/1 Ethernet1/0/1 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
C.
[SWB]display interface Ethernet 1/0/2 Ethernet1/0/2 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10,20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
D.
[SWC]display interface Ethernet 1/0/1 Ethernet1/0/1 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10,20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q