[Techtalk] Question about DNS

[jennyw]

I recently entered some A records into my name server and noticed that some
sites cannot resolve these new names. Usually, these sites are schools
(Stanford and SJSU).

Why is this?  I thought that name resolution info was cached only when a
name was found?  Or DNS doesn't find a server name does it cache that there
is no server and leave it at that for a week or so?  This seems strange,
especially since at Stanford it sometimes takes a couple weeks for things to
work right.

Thanks!

Jen