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Which of the following is used to serve as an emergency backup line to troubleshoot a broadbandconnection on many routers?()
A.DSL
B.POTS
C.VDSL
D.Smart jack
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更多 “ Which of the following is used to serve as an emergency backup line to troubleshoot a broadbandconnection on many routers?() A.DSLB.POTSC.VDSLD.Smart jack ” 相关考题
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