What is a valid IPv6 address?
Click on the arrows to vote for the correct answer
A. B. C. D.C
Option A is not a valid IPv6 address. It is a MAC address, which is used to identify network interfaces at the link layer of network communication.
Option B is not a valid IPv6 address. It is an IPv4 address, which uses a 32-bit address space and is being replaced by IPv6 due to its limited address space.
Option C is a valid IPv6 address. IPv6 uses a 128-bit address space and is written as eight groups of four hexadecimal digits, separated by colons. Leading zeros in each group can be omitted, but at least one digit must be present in each group. In this example, the address is 2001:0db8:3000:2215:0000:0000:aaaa:1111, where each group represents a 16-bit value.
Option D is not a valid IPv6 address. It is a format of IPv4 address with dot-decimal notation, but it is not written correctly. IPv4 addresses use a 32-bit address space and are written as four decimal numbers, each ranging from 0 to 255, separated by dots. In this example, the address has too many digits and uses leading zeros, which are not allowed.
Therefore, the correct answer is C, which represents a valid IPv6 address.