DNS resolver cache is a cache of all the domain names and their resolved I.P. addresses. It gets added to when you request information from a machine in a domain which your machine doesn't already know the I.P. address of, i.e. there isn't an entry in the DNS cache already.
So to say 'URL requests' is not technically correct since a URL could contain the name of a file, such as a .html file. The URL wouldn't get stored in the DNS cache, however, the hosting machines domain name and I.P. address would be.
I am ashamed to say I don't know how to display the dns cache in linux but in windows you can see it using this command:
Optionally you can pipe that through the 'more' application:
ipconfig /displaydns | more
Last edited by mickyg; 04-25-2006 at 03:33 AM.