Enthusiast

These two rfc written November 1987 – Obsoletes: RFCs 882, 883, 973 – QUESTION – Have these been updated – OR are they still the current rfc on the topic of ‘Domain Names‘ ?

http://tools.ietf.org/html/rfc1034

http://tools.ietf.org/html/rfc1035

A host can participate in the domain name system in a number of ways,

depending on whether the host runs programs that retrieve information from the domain system, name servers that answer queries from other hosts, or various combinations of both functions. The simplest, and perhaps most typical, configuration is shown below:

                 Local Host                        |  Foreign
                                                   |
    +---------+               +----------+         |  +--------+
    |         | user queries  |          |queries  |  |        |
    |  User   |-------------->|          |---------|->|Foreign |
    | Program |               | Resolver |         |  |  Name  |
    |         |<--------------|          |<--------|--| Server |
    |         | user responses|          |responses|  |        |
    +---------+               +----------+         |  +--------+
                                |     A            |
                cache additions |     | references |
                                V     |            |
                              +----------+         |
                              |  cache   |         |
                              +----------+         |