问题:
A . Full-duplex Ethernet uses CSMA/CD to prevent collisions.
B . Half-duplex Ethernet uses a loopback circuit to detect collisions.
C . A full-duplex Ethernet card allows 20Mbps for data transmission.
D . Full-duplex Ethernet makes use of two pairs of wires for data.
E . An Ethernet hub can operate both half and full duplex simultaneously.
● 参考解析
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