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IPv4

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Stands for Internet Protocol Version 4. A numerical address assigned to each device connected to a computer network. IPv4 defines an IP address as a 32-bit number divided into four 8 bit octets, and is usually expressed as a dotted decimal number each ranging from 1 to 254. Eg:

192.168.1.2

With IPv4 you can have a maximum of 4,294,967,296 devices.