Internet Protocol Address [ˈɪn.t̬ɚ.net ˈproʊ.t̬ə.kɑːl ˈæd.res]: a unique identifier to address computers in a network.
Every device which wants to connect to the Internet needs a unique IP Adress. Because in the near future there will be more devices than IP adresses, the old IPv4 standard is going to be replaced by the newer IPv6 standard.
IPv4 address is represented in four groups of three decimal digits, for example: 192.162.1.1
IPv6 address is represented in eight groups of four hexadecimal digits, for example: 2001:0db8:85a3:0000:0000:8a2e:0370:7334
Trivia: You could assign an IPv6 address to every atom of the surface of the earth and still have more than enough addresses left.
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