Difference between secondary and slave dns servers

smallpond smallpond at juno.com
Thu Nov 16 19:19:23 UTC 2006

Kevin Darcy wrote:
> smallpond wrote:
> > voipfc wrote:
> >
> >> What is the difference between secondary and slave dns servers?
> >>
> >> Are they synonyms or are there some subtle diffference between them?
> >>
> >
> > Slave Servers
> > The other authoritative servers, the slave servers (also known as
> > secondary servers) ...
> >
> > from the bind documentation.
> >
> Yeah, they're pretty much synonymous. If there's any subtle difference
> between the two, it's that "slave" is more often seen in a _relational_
> context, i.e. one half of the "master/slave" relationship, whereas
> "secondary" is more often used when describing a whole infrastructure
> (although I have occasionally see the term "primary" being used as a
> synonym for "master").
> Let's not forget, also, that a "slave" server can also serve as a
> "master" to other, downstream slaves, in a "multi-hop" architecture. So
> the use of the term "secondary" gets a little confusing at that point.
> What do we call the downstream slaves? "Tertiaries"? And the slaves
> downstream from those? Calling them all just "slaves" simplifies things.
> - Kevin

I had forgotten about one other important distinction, mentioned here:


It seems that if you want to do business in California, you are better
off with primary/secondary.


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