RFC 1348 (rfc1348) - Page 2 of 4

DNS NSAP RRs

RFC 1348                      DNS NSAP RRs                     July 1992


   The backward translation (from NSAP address to DNS name) is
   facilitated by definition of an associated resource record. This
   resource record is known as "NSAP-PTR", and is used in a manner
   analogous to the existing "in-addr.arpa".

   These RRs are intended for use in a proposal [6] by one of the
   members of the NOOP WG to address the next-generation internet.

The NSAP RR

   The NSAP RR is defined with mnemonic NSAP and type code 22 (decimal).

   An NSAP (Network Service Access Protocol) number is a unique string
   to OSI transport service.

   The numbering plan follows RFC 1237 and associated OSI definitions
   for NSAP format.

   NSAP has the following format:

    NSAP 

   All fields are required.

    identifies the number of octets in the  as
   defined by the various national and international authorities.

    enumerates the actual octet values assigned by the
   assigning authority.  Its format in master files is a  syntactically identical to that used in TXT and HINFO.

   The format of NSAP is class insensitive.  NSAP RR causes no
   additional section processing.

   For example:

foo.bar.com.    IN  NSAP   21 47000580ffff000000321099991111222233334444
host.school.de  IN  NSAP   17 39276f3100111100002222333344449876

   The RR data is the ASCII representation of the digits.  It is encoded
   as two , i.e., count followed by characters.

The NSAP-PTR RR

   The NSAP-PTR RR is defined with mnemonic NSAP-PTR and a type code 23
   (decimal).

   Its function is analogous to the PTR record used for IP addresses



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