[单选题]NAT可以被用于完成多种功能，以下不属于其功能的是：（）

正确答案 ：D

内部网络流量控制

[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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