A.The Outer.1Q tag represents customer VLAN ID and inner.1Q tag represents Provider VLAN (PVLAN )
B.It is an effective way to achieve VLAN transparency between Provider and enterprise customer bytunneling one ser of VLAN tags inside a second VLAN tag
C.The Outer.1Q tag represents Service VLAN (PVLAN) and inner.1Q tag represents customer VLAN
D.QinQ is a way to hide native VLAN which can conflict with Provider native VLAN