单选题In a Bridged 1483 network, what Layer 2 encapsulations are passed between the DSL bridge and the ERX?（）Asingle ATM headerBsingle Ethernet headerCATM header followed by a PPP headerDATM header followed by an Ethernet header
单选题
In a Bridged 1483 network, what Layer 2 encapsulations are passed between the DSL bridge and the ERX?（）
A
single ATM header
B
single Ethernet header
C
ATM header followed by a PPP header
D
ATM header followed by an Ethernet header
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