At Mon, 19 Jan 2015 14:16:47 -0800,
Paul Hoffman wrote:
> 
> [...] we wanted people to look over the new version and give
> feedback. Thanks!

  The introduction presents the definition,
  "The DNS is a simple query-response protocol whose messages in both
   directions have the same format."

  Maybe it's just me, but I think a broader definition would be useful
  for "instructional" purposes.  I'm not thinking here only of teaching
  students or professional trainees, but also of persuading management.
  
  From time to time, I've found I needed to describe the DNS in any
  of four different ways, according to the aspect needing emphasis
  in particular circumstances.

  FWIW, I see the DNS as

  - a naming scheme for objects on the Internet;

  - a database representing the names and certain properties of these
    objects;

  - an architecture providing distributed maintenance, resilience,
    and loose coherency for this database; and

  - a simple query-response protocol (as mentioned in the current
    draft) implementing this architecture.

  IHTH
  Niall O'Reilly
  

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