[单选题]为了阻止交换机环路，交换机上所采用的技术为（）

正确答案 ：B

生成树协议

[单选题]The Ezonexam LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?

正确答案 ：C

Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

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