单选题Which of the following is true about an IP address if the first bit is a zero?（）AThe address is a Class A address.BThe address is a Class B address.CThe address is a Class C address.DThe address is a Class D address.
单选题
Which of the following is true about an IP address if the first bit is a zero?（）
A
The address is a Class A address.
B
The address is a Class B address.
C
The address is a Class C address.
D
The address is a Class D address.
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