IPv6 (Internet Protocol version 6) is the successor to IPv4 and uses 128-bit addresses represented as eight groups of four hexadecimal digits separated by colons (e.g. 2001:db8::1). This enables approximately 340 undecillion unique addresses. Unlike IPv4, IPv6 has built-in security features (IPSec), better routing efficiency and no need for NAT (Network Address Translation). Germany is one of the countries with high IPv6 adoption.