单选题Which statement is true？（）AAn IPv6 address is 64 b long and is represented as hexadecimal characters.BAn IPv6 address is 32 b long and is represented as decimal digits.CAn IPv6 address is 128 b long and is represented as decimal digits.DAn IPv6 address is 128 b long and is represented as hexadecimal characters
单选题
Which statement is true？（）
A
An IPv6 address is 64 b long and is represented as hexadecimal characters.
B
An IPv6 address is 32 b long and is represented as decimal digits.
C
An IPv6 address is 128 b long and is represented as decimal digits.
D
An IPv6 address is 128 b long and is represented as hexadecimal characters
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