IPv6
In plain terms
The newer IP version with a vastly larger address space.
Going deeper
IPv6 uses 128-bit addresses, providing a practically unlimited supply to replace IPv4's exhausted pool, with built-in improvements. Adoption is ongoing.
Under the hood
No NAT needed and simplified headers; coexists with IPv4 during gradual transition.
Examples
2001:db8::1, modern networks, IoT scale, address-exhaustion fix.
Think of it like...
Like upgrading to a phone system with enough numbers for every grain of sand on Earth.