How To Assign Ip Addresses

In 1981, the addressing specification was revised with the introduction of classful network architecture.

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The IP address space is managed globally by the Internet Assigned Numbers Authority (IANA), and by five regional Internet registries (RIRs) responsible in their designated territories for assignment to end users and local Internet registries, such as Internet service providers.Of this number, some addresses are reserved for special purposes such as private networks (~18 million addresses) and multicast addressing (~270 million addresses).IPv4 addresses are usually represented in dot-decimal notation, consisting of four decimal numbers, each ranging from 0 to 255, separated by dots, e.g., IPv4 addresses may be presented in various hexadecimal, octal, or binary representations.The gap in version sequence between IPv4 and IPv6 resulted from the assignment of version 5 to the experimental Internet Stream Protocol in 1979, which however was never referred to as IPv5.IP networks may be divided into subnetworks in both IPv4 and IPv6.Two versions of the Internet Protocol are in common use in the Internet today.The original version of the Internet Protocol that was first deployed in 1983 in the ARPANET, the predecessor of the Internet, is Internet Protocol version 4 (IPv4).For example, is considered an IP address, while is considered a network address.Both IP and network addresses are accompanied by their subnet mask, which is used to define how large or small the network is.Among other technical changes, each version defines the format of addresses differently.Because of the historical prevalence of IPv4, the generic term IP address typically still refers to the addresses defined by IPv4.


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