[多选题]Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet? (Select two answer choices.)

正确答案 ：BD

Half-duplex Ethernet uses a loopback circuit to detect collisions.

Full-duplex Ethernet makes use of two pairs of wires for data.

解析：解析：Explanation:

[单选题]把指定端口添加到VLAN的命令是：()

正确答案 ：D

switch port

[单选题]在地址转换中，()用来规定哪些数据包需要进行地址转换

正确答案 ：B

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