Identify which of the following is a valid IPv6 address:
Answer with explanationAnswer: Option D
The correct answer is 2631:0:139B::8C0:876A:630C
IPv6 addresses are 128-bit hexadecimal addresses. Therefore, letters such as “G” and “H” contained in the second and third answers are invalid. The fourth answer contains two semi-columns “::”, which is also invalid, as the semi-column can only be used once in an IPv6 address.
More information on IPv6 can be found on Firewall. cx’s analysis of IPv6 Protocol structure and IPv6 subnetting.
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