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  2. IPv4 - Wikipedia

    en.wikipedia.org/wiki/IPv4

    Decomposition of the quad-dotted IPv4 address representation to its binary value. IPv4 uses 32-bit addresses which limits the address space to 4 294 967 296 (2 32) addresses. IPv4 reserves special address blocks for private networks (2 24 + 2 20 + 2 16 ≈ 18 million addresses) and multicast addresses (2 28 ≈ 268 million addresses).

  3. IP address - Wikipedia

    en.wikipedia.org/wiki/IP_address

    Internet Protocol version 4 (IPv4) was the first standalone specification for the IP address, and has been in use since 1983. [2] IPv4 addresses are defined as a 32-bit number, which became too small to provide enough addresses as the internet grew, leading to IPv4 address exhaustion over the 2010s.

  4. List of assigned /8 IPv4 address blocks - Wikipedia

    en.wikipedia.org/.../8_IPv4_address_blocks

    The original list of IPv4 address blocks was published in September 1981. [3] In previous versions of the document, [19] [20] network numbers were 8-bit numbers rather than the 32-bit numbers used in IPv4. At that time, three networks were added that were not listed earlier: 42.rrr.rrr.rrr, 43.rrr.rrr.rrr, and 44.rrr.rrr.rrr.

  5. Classless Inter-Domain Routing - Wikipedia

    en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

    An IP address is part of a CIDR block and is said to match the CIDR prefix if the initial n bits of the address and the CIDR prefix are the same. An IPv4 address is 32 bits so an n-bit CIDR prefix leaves 32 − n bits unmatched, meaning that 2 32−n IPv4 addresses match a given n-bit CIDR prefix. Shorter CIDR prefixes match more addresses ...

  6. Multicast address - Wikipedia

    en.wikipedia.org/wiki/Multicast_address

    Packets destined to administratively scoped IPv4 multicast addresses do not cross administratively defined organizational boundaries, and administratively scoped IPv4 multicast addresses are locally assigned and do not have to be globally unique. The 239.0.0.0 / 8 range may be structured to be loosely similar to the scoped IPv6 multicast ...

  7. How To Find Your IP Address, And Why You Should Know It in ...

    www.aol.com/ip-address-why-know-first-211700667.html

    There are two primary types of IP addresses in use today: IP version 4 (IPv4) and IP version 6 (IPv6). The former has been around since January 1983, and is still the most common. These are 32-bit ...

  8. File:IPv4 address structure and writing systems-en.svg

    en.wikipedia.org/wiki/File:IPv4_address...

    The following other wikis use this file: Usage on de.wikibooks.org Fachinformatik/ Adressierung; Usage on en.wikiversity.org WikiJournal of Science/A Survey on Internet Protocol version 4 (IPv4)

  9. Classful network - Wikipedia

    en.wikipedia.org/wiki/Classful_network

    In the original address definition, the most significant eight bits of the 32-bit IPv4 address was the network number field which specified the particular network a host was attached to. The remaining 24 bits specified the local address, also called rest field (the rest of the address), which uniquely identified a host connected to that network ...