多选题Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?（）AFull-duplex Ethernet uses CSMA/CD to prevent collisions.BHalf-duplex Ethernet uses a loopback circuit to detect collisions.CA full-duplex Ethernet card allows 20Mbps for data transmission.DFull-duplex Ethernet makes use of two pairs of wires for data.EAn Ethernet hub can operate both half and full duplex simultaneously.
多选题
Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?（）
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.
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