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  2. Classless Inter-Domain Routing - Wikipedia

    en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

    A subnet mask encodes the same information as a prefix length but predates the advent of CIDR. In CIDR notation, the prefix bits are always contiguous. Subnet masks were allowed by RFC 950 [6] to specify non-contiguous bits until RFC 4632 [5]: Section 5.1 stated that the mask must be left contiguous. Given this constraint, a subnet mask and ...

  3. List of SMTP server return codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SMTP_server_return...

    The Basic Status Codes have been in SMTP from the beginning, with RFC 821 in 1982, but were extended rather extensively, and haphazardly so that by 2003 RFC 3463 rather grumpily noted that: "SMTP suffers some scars from history, most notably the unfortunate damage to the reply code extension mechanism by uncontrolled use.

  4. List of RFCs - Wikipedia

    en.wikipedia.org/wiki/List_of_RFCs

    This is a partial list of RFCs (request for comments memoranda). A Request for Comments (RFC) is a publication in a series from the principal technical development and standards-setting bodies for the Internet, most prominently the Internet Engineering Task Force (IETF).

  5. Noel Chiappa - Wikipedia

    en.wikipedia.org/wiki/Noel_Chiappa

    He is acknowledged [clarification needed] in several other RFC's, such as RFC-826, RFC-919, RFC-950 and others. [6] [7] [8] [citation needed] He has worked extensively on the Locator/Identifier Separation Protocol (LISP).

  6. Subnet - Wikipedia

    en.wikipedia.org/wiki/Subnet

    Creating a subnet by dividing the host identifier. A subnetwork, or subnet, is a logical subdivision of an IP network. [1]: 1, 16 The practice of dividing a network into two or more networks is called subnetting.

  7. Internet Standard - Wikipedia

    en.wikipedia.org/wiki/Internet_Standard

    For example, in 2007 RFC 3700 was an Internet Standard (STD 1) and in May 2008 it was replaced with RFC 5000. RFC 3700 received Historic status, and RFC 5000 became STD 1. The list of Internet standards was originally published as STD 1 but this practice has been abandoned in favor of an online list maintained by the RFC Editor.

  8. Internet layer - Wikipedia

    en.wikipedia.org/wiki/Internet_layer

    The internet layer is a group of internetworking methods, protocols, and specifications in the Internet protocol suite that are used to transport network packets from the originating host across network boundaries; if necessary, to the destination host specified by an IP address.

  9. IPv4 - Wikipedia

    en.wikipedia.org/wiki/IPv4

    In 1993, based on this work, RFC 1517 introduced Classless Inter-Domain Routing (CIDR), [7] which expressed the number of bits (from the most significant) as, for instance, /24, and the class-based scheme was dubbed classful, by contrast. CIDR was designed to permit repartitioning of any address space so that smaller or larger blocks of ...