IPv6 is the new version of the internet protocol which identifies devices on a network and route data across the internet.

We need IPv6 because its address size is 128-bit compared to IPv4 which size is 32-bit, address count IPv6 is 340 undecillions while IPv4 is 4.3 billion. IPv6 no NAT needed and security is built-in whereas in IPv4 security is optional.

IPv4 has lasted this long due to recycling, sharing and smart allocation of addresses (DHCP): devices do not keep IPs forever, IPs are reused when devices disconnect. Which means the same address can serve many users over time. Furthermore, private IP addresses reduce demand for public addresses and CIDR and subnetting improved efficient…

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