rfc 1123

from The Free On-line Dictionary of Computing (8 July 2008)
RFC 1123

   <networking, standard> The {RFC} "Requirements for Internet
   Hosts Application and Support" which clarifies or changes the
   specification of protocols given in earlier RFCs.

   RFC 1123 defines the terms "MUST", "SHOULD", "MAY",
   "unconditionally compliant", "conditionally compliant".
   Capitals are used to emphasise that the official definition of
   the word is being used.

   MUST or REQUIRED means an absolute requirement for
   conformance.

   SHOULD or RECOMMENDED means the item can be ignored under
   certain circumstances, although the full implications should
   be understood.

   MAY or OPTIONAL means the implementor can choose, usually
   depending on whether it is needed or not.

   Something "unconditionally compliant" meets all the MUST and
   SHOULD requirements, "conditionally compliant" meets all the
   MUST requirements and "not compliant" - does not meet some
   MUST requirement.

   For example, RFC 1123 amends RFC952 to say software MUST
   handle either a letter or a digit as the first character of a
   {hostname}.

   {(rfc:1123)}.

   (1996-01-13)
    

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