n the case of Ethernet transport， which two types of attachment circuits does L2TPv3 support？ （）
- A、port tunneling on the Ethernet subinterface
- B、VLAN tunneling on the Ethernet trunk
- C、port tunneling on the Ethernet interface
- D、VLAN tunneling on the Ethernet VLAN subinterface
- E、port tunneling on the Ethernet trunk
正确答案:C,D
答案解析:有
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