James Fadden wrote:
Most browsers have their own cache ("mini-cache") which follows its
own rules.
If they can't find the resolution there they ask the operating system
cache (the one that is displayed by ipconfig /displaydns)..
If the operating system doesn't have it, it asks the DNS server.
It's possible she may have been getting success due to pages in the
browser DNS cache, but not in the OS DNS cache. The POP3 server was not likely to be
in the browser cache since it's mainly used by the email program.
Usually the browser cache only retains entries for very short times,
but this is not always the case. IE used to cache for 24 hours, but MS later
reduced that to 30 minutes. Firefox/Mozilla use 1 minute.
The firefox cache can be configured by entering about:config as a
browser address. netwwork.dnsCacheEntries determines the number of addresses
cached.
The default is 20. network.dnsCacheExpiration determines how long
addresses are retained. The default is 60 (seconds).
Thanks. This was with FireFox (and Thunderbird).
Pete
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