Correct option is C
IPv6 (Internet Protocol version 6) addresses are designed to replace the older IPv4 addresses, providing a vastly larger address space.
An IPv6 address is 128 bits in length, compared to the 32-bit length of an IPv4 address.
This increase in address size allows for a virtually unlimited number of unique IP addresses, accommodating the growth of internet-connected devices.
IPv6 addresses are represented as eight groups of four hexadecimal digits, separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334).
The other options (16 bits, 32 bits, and 256 bits) do not correctly represent the length of an IPv6 address.