TECH: Netscape error message

[Susan Burstein <sburstei@CSUNET.CTSTATEU.EDU>]

I have started having difficulty with my Netscape recently.  Addresses
that I have often reached both through entering a url and through my
bookmark file cannot be found.  The message from Netscape is as follows:

Netscape is unable to locate the server (server address).  The
server does not have a DNS entry.  Check the server name in the URL
and try again.

Another problem I am having is getting the message to ignore or
cancel a  url request.  If I hit ignore 4 or 5 times, I usually
manage to get to the address, but not always.

Any ideas as to what is going on?
What is a DNS entry?

TIA

Susan Burstein
Portland Middle School, Portland, CT
sburstei@csunet.ctstateu.edu
portland@connix.com