Definition of Ipv6

The main improvement brought by IPv6 is a much larger address space that allows greater flexibility in assigning addresses. IPv6 is able to support 2¹²⁸ (about 3.4×10³⁸) addresses, or approximately 5×10²⁸ addresses for each of the roughly 6.5 billion people alive today. It was not the intention of IPv6 designers, however, to give permanent unique addresses to every individual and every computer. Rather, the extended address length eliminates the need to use network address translation to avoid address exhaustion, and also simplifies aspects of address assignment and renumbering when changing providers.