An IPv6 address is how many bits in length?

An IPv6 address is 128 bits in length, which is designed to significantly expand the IP address space compared to its predecessor, IPv4. This means that an IPv6 address is expressed in eight groups of four hexadecimal digits, separated by colons (for example, 2001:0db8:85a3:0000:0000:8a2e:0370:7334). The larger address space allows for a virtually unlimited number of unique IP addresses, accommodating the growing number of devices connected to the internet.

The other lengths listed, such as 64 bits or 32 bits, correspond to other types of IP addresses or subnetting arrangements, but they do not accurately reflect the full length of an IPv6 address. The 256 bits choice is also incorrect, as it exceeds the standard length established for IPv6, which is precisely at 128 bits, ensuring efficient routing and connectivity among network devices.