Which cannot support full-duplexing?
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100BaseT4
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10BaseT
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100BaseTX
A
Correct answer
Explanation
100BaseT4 uses four pairs of Category 3 (or better) cabling. Because it requires three pairs to transmit or receive data simultaneously in one direction, it cannot support full-duplex operation. 10BaseT and 100BaseTX only require two pairs and can operate in full-duplex mode.