What is IPv6?
IPv6 (Internet Protocol version 6) is the most recent version of the Internet Protocol, designed to replace IPv4 by providing a vastly larger address space of 128-bit addresses, supporting approximately 340 undecillion unique addresses.
How Does IPv6 Work?
IPv4 uses 32-bit addresses (such as 192.168.1.1) and supports roughly 4.3 billion unique addresses — a pool that has been essentially exhausted due to the explosive growth of internet-connected devices. IPv6 uses 128-bit addresses written in hexadecimal notation (such as 2001:0db8:85a3::8a2e:0370:7334), providing an almost inexhaustible supply of addresses. This removes the need for NAT (Network Address Translation), allowing every device to have its own globally unique address.
Beyond the larger address space, IPv6 includes improvements such as simplified header format for faster routing, built-in IPsec support for security, better multicast support, and stateless address autoconfiguration (SLAAC) that allows devices to configure their own addresses without a DHCP server. Migration from IPv4 to IPv6 is ongoing, with most modern hosting providers, CDNs, and internet service providers supporting dual-stack (IPv4 + IPv6) connectivity.