问题
单项选择题
Every host and router on the Internet has an IP address, which encodes its
A．host number
B．host number and socket
C．network number
D．host number and network number
答案
参考答案：D
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Every host and router on the Internet has an IP address, which encodes its
A．host number
B．host number and socket
C．network number
D．host number and network number
参考答案：D