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Which of the following options are true about TDRs? (Select all that apply.)

They can be used to test any kind of network cable: coaxial, telephony or fiber-optic.

TDRs lack visual interfaces.

A TDR transmits a short rise time pulse through the cable that's being tested.

They're the equivalent of OTDRs for metallic cables, such as coaxial or twisted wire pair.



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