问答题

硬件地址是物理层和数据链路层使用的物理地址，而IP 地址是网络层使用的逻辑地址。

答案：网际组管理协议（IGMP）

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A．It is profit based
B．It considers the time value of money
C．It is cash flow based
D．It doesn't measure the potential impact on shareholder wealth

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