单选题Which of the following is a valid IP address in the public addressing scheme?（）A10.20.1.1B168.192.10.1C233.10.20.1D172.20.10.1
单选题
Which of the following is a valid IP address in the public addressing scheme?（）
A
10.20.1.1
B
168.192.10.1
C
233.10.20.1
D
172.20.10.1
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