Which option is a valid IPv6 address example?

Which option is a valid IPv6 address example?

• A. 203.0.113.1
• B. 192.0.2.1
• C. 2001:0db8:85a3:0000:0000:8a2e:0370:7334
• D. 255.255.255.0

Answer: (C)

IPv6 addresses use eight groups of hexadecimal digits separated by colons. The example shown has eight groups: 2001, 0db8, 85a3, 0000, 0000, 8a2e, 0370, 7334, and each group is up to four hex digits. This matches the standard IPv6 format exactly, so it’s a valid IPv6 address example. The other options use dots and decimal numbers, which is the IPv4 notation (for instance, 203.0.113.1 and 192.0.2.1). The last one is a common IPv4 subnet mask (255.255.255.0), not an IPv6 address.

IPv6 addresses use eight groups of hexadecimal digits separated by colons. The example shown has eight groups: 2001, 0db8, 85a3, 0000, 0000, 8a2e, 0370, 7334, and each group is up to four hex digits. This matches the standard IPv6 format exactly, so it’s a valid IPv6 address example.

The other options use dots and decimal numbers, which is the IPv4 notation (for instance, 203.0.113.1 and 192.0.2.1). The last one is a common IPv4 subnet mask (255.255.255.0), not an IPv6 address.