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【单选题】
以下关于 IP 地址的描述中,错误的是 。A.
连接到互联网的每一台主机或路由器都有一个 IP 地址。
B.
原则上互联网上的任何两台主机与路由器不会有相同的 IP 地址。
C.
如果一台主机通过多个网卡分别连接到多个网络，必须为每个接口分配一个 IP 地址。
D.
如果一条线路互联两台路由器，一条线路的两个端口可以共用一个 IP 地址。
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