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Different nodes on the same IP network
are identified by their IP
address. For example, each network interface on the computer on which
you are reading this text will have a different IP address, as will
every remote interface on the network to which your computer is connected.
There are two IP address formats in common use. Currently the huge majority of remote addresses use the IPv4 format, which is a 32-bit number, but is most often written as four separate octets (8-bit numbers) separated by a dot. For example “192.168.0.32”.