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- Path: sparky!uunet!psgrain!ee.und.ac.za!tplinfm
- From: barrett@daisy.ee.und.ac.za (Alan P Barrett)
- Newsgroups: comp.protocols.tcp-ip.domains
- Subject: Re: Negative caching
- Date: 7 Jan 1993 22:10:36 +0200
- Organization: Dept. Elec. Eng., Univ. Natal, Durban, S. Africa
- Lines: 12
- Distribution: inet
- Message-ID: <1ii2nsINNnsj@daisy.ee.und.ac.za>
- References: <by91Hibayb@atlantis.psu.edu> <1ihlanINNlj9@daisy.ee.und.ac.za> <#gb1Hfjgyb@atlantis.psu.edu>
- NNTP-Posting-Host: daisy.ee.und.ac.za
-
- In article <#gb1Hfjgyb@atlantis.psu.edu>,
- barr@pop.psu.edu (David Barr) writes:
- > Hmm. Does this work?
-
- No. You can make no assumptions about the validity of the domains
- between the one you asked about and the one reported in the SOA record in
- the NXDOMAIN error reply. You know that the intermediate domains don't
- have SOA records but you don't know if they exist. If you asked for the
- SOA record for one of these intermediate domains you might get either
- NOERROR or NXDOMAIN, and until you try it you don't know which it will be.
-
- --apb (Alan Barrett)
-