单选题A user is connected on a DSL line and is using a PPP over Ethernet service.Which network device strips the ATM header from the datagram and investigates the PPP header?（）ADSLAMBDSL modemCERX Edge RouterDcustomer workstation
单选题
A user is connected on a DSL line and is using a PPP over Ethernet service.Which network device strips the ATM header from the datagram and investigates the PPP header?（）
A
DSLAM
B
DSL modem
C
ERX Edge Router
D
customer workstation
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