IPv6 (Internet Protocol version 6) is a 128-bit addressing system designed to replace IPv4 and support a vast number of unique addresses.

Elaboration:

• Supports trillions of unique IP addresses.
• Uses hexadecimal notation (2001:0db8:85a3::8a2e:0370:7334).
• Provides better security and faster routing.

Example:

A typical IPv6 address looks like this:

2001:0db8:85a3::8a2e:0370:7334

Most modern devices and ISPs now support IPv6.