Network Working Group                                          J. Postel
Request for Comments: 920                                    J. Reynolds
                                                                     ISI
                                                            October 1984

                          Domain Requirements


Status of this Memo

   This memo is a policy statement on the requirements of establishing a
   new domain in the ARPA-Internet and the DARPA research community.
   This is an official policy statement of the IAB and the DARPA.
   Distribution of this memo is unlimited.

Introduction

   This memo restates and refines the requirements on establishing a
   Domain first described in RFC-881 [1].  It adds considerable detail
   to that discussion, and introduces the limited set of top level
   domains.

The Purpose of Domains

   Domains are administrative entities.  The purpose and expected use of
   domains is to divide the name management required of a central
   administration and assign it to sub-administrations.  There are no
   geographical, topological, or technological constraints on a domain.
   The hosts in a domain need not have common hardware or software, nor
   even common protocols.  Most of the requirements and limitations on
   domains are designed to ensure responsible administration.

   The domain system is a tree-structured global name space that has a
   few top level domains.  The top level domains are subdivided into
   second level domains.  The second level domains may be subdivided
   into third level domains, and so on.

   The administration of a domain requires controlling the assignment of
   names within that domain and providing access to the names and name
   related information (such as addresses) to users both inside and
   outside the domain.













 


RFC 920                                                     October 1984
Domain Requirements


General Purpose Domains

   While the initial domain name "ARPA" arises from the history of the
   development of this system and environment, in the future most of the
   top level names will be very general categories like "government",
   "education", or "commercial".  The motivation is to provide an
   organization name that is free of undesirable semantics.

   After a short period of initial experimentation, all current
   ARPA-Internet hosts will select some domain other than ARPA for their
   future use.  The use of ARPA as a top level domain will eventually
   cease.

Initial Set of Top Level Domains

   The initial top level domain names are:

      Temporary

         ARPA  =  The current ARPA-Internet hosts.

      Categories

         GOV  =  Government, any government related domains meeting the
                 second level requirements.

         EDU  =  Education, any education related domains meeting the
                 second level requirements.

         COM  =  Commercial, any commercial related domains meeting the
                 second level requirements.

         MIL  =  Military, any military related domains meeting the
                 second level requirements.

         ORG  =  Organization, any other domains meeting the second
                 level requirements.