IPv4 vs IPv6 addressing: IPv4 uses a 32-bit numeric address written in dot-decimal format (e.g., 192.168.1.1), allowing about 4.3 billion unique addresses. IPv6 uses a 128-bit alphanumeric address written in hexadecimal with colons (e.g., 2001:0db8::1), providing an almost unlimited number of unique addresses with improved efficiency and security. https://www.uninets.com/blog/compare-ipv4-and-ipv6-addressing