题目内容
（请给出正确答案）
[主观题]
Which set of commands correctly builds a PPP over Ethernet connection on a DSL connection？（）
A. interface atm 5/1.1 atm pvc 1 0 101 aal5snap encapsulation ppp ppp authentication chap ip unnumbered loopback 1
B. interface atm 5/1.1 atm pvc 1 0 101 aal5snap encapsulation pppoe interface pppoe 5/1.1 encapsulation ppp ppp authentication chap ip unnumbered loopback 1
C. interface atm 5/1.1 atm pvc 1 0 101 aal5snap encapsulation pppoe interface atm 5/1.1.1 encap ppp ppp authentication chap ip unnumbered loopback 1
D. interface atm 5/1.1 atm pvc 1 0 101 aal5snap encapsulation pppoe ppp authentication chap ip unnumbered loopback 1
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