IPv4 and IPv6 are the two versions of Internet Protocol (IP) used to identify devices on the Internet and route traffic between them.  Here are the key differences between the two: Address Length: IPv4 addresses are 32-bit long, while IPv6 addresses are 128-bit long. This means IPv6 can support a much larger number of unique addresses. Address Notation: IPv4 addresses are represented using four sets of decimal numbers separated by dots (e.g. 192.168.1.1), while IPv6 addresses are represented using eight groups of hexadecimal numbers separated by colons (e.g. 2001:0db8:85a3:0000:0000:8a2e:0370:7334). Header Format: IPv6 has a simplified header format compared to IPv4, which helps reduce processing overhead and increase efficiency. Security: IPv6 has built-in security features, such as IPsec encryption, that were not present in IPv4. Routing: IPv6 has improved routing capabilities compared to IPv4, making it easier to route traffic in large-scale networks. Deployment: IPv4 is widely dep