CCNA Routing and Switching (legacy) — Question 168

Which IPv6 address is valid?

Answer options

• A. 2031:0:130F::9C0:876A:130B
• B. 2001:0db8:0:130H::87C:140B
• C. 2001:0db8:0000:130F:0000:0000:08GC:140B
• D. 2031::130F::9C0:876A:130B

Correct answer: A

Explanation

The correct answer is A because it follows the proper format for IPv6 addresses. Options B and C contain invalid hexadecimal characters (H and G), while option D incorrectly uses two double colons, which is not allowed in IPv6 notation.