IPv4 - Internet Protocol Version 4

There are two IP address formats- IPv4 and IPv6. IPv4 (Internet Protocol version 4), the older of the two, has been in use since 1982 and is still used by most devices. They use a 32-bit address range, meaning the maximum number of addresses is 2³² (4,294,967,296).

IPv4 addresses are written in quad-dotted notation, meaning four integers that are each separated by a decimal. Each 8-bit integer ranges from 0 to 255.

Examples:

192.168.1.3

67.205.14.209

Say we use x.x.x.x to represent an IPv4 address. Each x must equal a number 0-255.