IPv4 (Internet Protocol version 4) is a 32-bit addressing system used to uniquely identify devices on a network.

Elaboration:

• Supports 4.3 billion unique IP addresses (e.g., 192.168.1.1).
• Uses dot-decimal notation (xxx.xxx.xxx.xxx).
• Limited address space led to the development of IPv6.

Example:

A typical IPv4 address looks like this:

192.168.1.1

This is often used for local networks and router configurations.